TANKLESS DROP-IN REPLACEMENT BOILER

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This utility patent application claims the benefit of U.S. Ser. No. 63/713,984 filed Oct. 30, 2024, with the United States Patent and Trademark Office (“USPTO”). That provisional application is titled “Tankless Drop In Replacement Boiler System,” and is incorporated herein in its entirety by reference.

COPYRIGHT NOTICE

A portion of the disclosure of this patent document contains material which is subject to copyright protection. The Applicant makes no objection to the facsimile reproduction of the patent as published by the United States Patent and Trademark Office, but otherwise reserves all copyright rights whatsoever.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

FIELD OF DISCLOSURE

The present disclosure relates generally to the heating of non-combustible fluids. More specifically, the present disclosure relates to tankless fluid boiler systems for heating water for residential and commercial clients.

BACKGROUND OF THE DISCLOSURE

Tank-based boiler systems are used for heating aqueous fluids and, in many cases, for generating steam. Conventional tank-based boiler systems are often bulky, requiring significant space for installation, use, and attachment of auxiliary components. This limits the ability to repair and replace parts, particularly in buildings, boiler rooms, and machinery spaces with spatial constraints. The size and configuration of boiler systems can restrict their adaptability to different heating loads and often necessitate custom alterations for replacement or repair, all of which have an ability to increase costs associated with installation, maintenance, and operation of said systems.

Conventional tank-based systems are generally not modular, limiting compatibility with components provided by various manufacturers. Replacement of specific components often requires extensive changes to an existing boiler room infrastructure, assuming one can find the appropriate replacement parts. Moreover, the inherent heating capacity of conventional tank-based systems can be limited by their storage volume and design, making them impractical for applications with fluctuating or high-demand heating needs.

Accordingly, a need exists for a boiler system for residential and commercial applications that does not rely upon a large tank for heating. A need further exists for a tankless boiler system that is both compact and adaptable, addressing the shortcomings of existing tank-based systems. Still further, a need exists for a boiler system comprising at least some modular components.

SUMMARY OF THE DISCLOSURE

A fluid boiler system is first provided herein. The fluid boiler system is preferably a fluid boiler system that is used for heating an aqueous fluid, such as potable water.

In one aspect, the fluid boiler system first comprises an elongated housing. The housing may be, for example, a six-sided housing. Optionally, the housing may embody a substantially rectangular or a substantially square profile. Preferably, the housing includes one or more removeable panels to facilitate access to internal components.

The fluid boiler system also includes a water line. The water line extends through the housing, such as through one or more of the removable panels. In this embodiment, the water line includes both a cold water inlet disposed proximate a first end of the water line and a heated fluid outlet disposed at a second, opposing end of the water line.

Further, the fluid boiler system may include a gas line, with the gas line also extending into the housing. The gas line includes a gas inlet, and a gas burner disposed along the gas line within the housing. The gas burner is configured to introduce gas, such as natural gas, liquified natural gas (LNG), liquified petroleum gas (LPG), and other suitable combustion fuels, into the fluid boiler system to heat water along the water line.

The fluid boiler system may also comprise a fresh air intake. The fresh air intake is configured to supply oxygen, i.e., ambient air, into the housing. In one embodiment, the fresh air intake may further comprise a damper to control a flow rate of intake air into the system. An exhaust air outlet is also provided. Optionally, an exhaust fan facilitates movement of air from the exhaust air outlet and to an external environment via a vent. In an alternate embodiment, the system may comprise an intake fan, wherein the intake fan draws ambient air into the housing to create a positive internal pressure, which forces exhaust air out of the housing via the exhaust air outlet. An intake fan motor capable of speed modulation controls an amount of air entering the system, a resulting pressurization level within the housing, and removal of exhaust from the housing.

The fluid boiler system may additionally comprise a condensate drain. The condensate drain may reside at a base of the housing such that particulates, distillates, and other by-products of the heating process can be drained and removed from the fluid boiler system.

The fluid boiler system may also include a control module. The control module, which may be either removeable or non-removable, is connectable to the housing via one or more fasteners and attaches near a top portion of the housing such that it is accessible and viewable by an operator. The control module may further include a programmable or non-programmable controller, with the controller being configured to regulate operational parameters of the fluid boiler system, e.g., gas flow rate into and out of the system, water flow rate into the system, heated fluid flow rate out of the system, fresh air flow rate into the system, heated fluid outlet temperature and pressure, and various other operational parameters depending on demand and heat-load of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a fluid boiler system of the present disclosure, in one embodiment.

FIG. 2 shows a front elevation view of the fluid boiler system of FIG. 1.

FIG. 3 shows an enlarged, perspective view of a portion of the fluid boiler system of FIGS. 1 and 2.

FIG. 4 shows a rear elevation view of the fluid boiler system of FIG. 1.

FIG. 5 shows a top plan view of the fluid boiler system of FIG. 1.

FIG. 6 shows an enlarged, elevation view of a portion of the fluid boiler system of FIG. 1.

FIG. 7 shows a first front perspective view of internal components of the fluid boiler system of FIG. 1. The one or more removeable panels have been removed for illustrative purposes.

FIG. 8 shows a tankless fluid boiler, in an alternate embodiment. In this embodiment, a single removeable panel is shown. It is to be understood that additional removeable panels may be present in this embodiment; however, said additional removeable panels have been removed for illustrative purposes.

DETAILED DESCRIPTION OF SELECTED EMBODIMENTS

Embodiments of the present disclosure are provided herein; however, it is to be understood that the disclosed embodiments are merely examples and are not necessarily limited to features and limitations described herein. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to understand the present disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this disclosure belongs.

Wherever the phrase “for example,” “such as,” “including,” and the like are used herein, the phrase “and without limitation” is understood to follow unless explicitly stated otherwise. Similarly “an example,” “exemplary,” and the like are understood to be non-limiting.

The term “about,” when used in connection with a numerical value, refers to the actual given value, and to the approximation to such given value that would reasonably be inferred by one of ordinary skill in the art, including approximations due to the experimental and/or measurement conditions for such given value.

The terms “comprising,” “including,” “having,” “involving,” (and similarly “comprises,” “includes,” “has,” and “involves”), and the like may be used interchangeably and have the same meaning. Specifically, each of the terms is defined consistent with the common United States Patent Law definition of “comprising” and is therefore interpreted to be an open term meaning “at least the following,” and is also interpreted not to exclude additional features, limitations, aspects, etc. Thus, for example, “a device having components a, b, and c” means that the device includes at least components a, b, and c. Similarly, the phrase “a method involving steps a, b, and c” means that the method includes at least steps a, b, and c.

The term “natural gas,” when used in connection with the present disclosure, refers to any type of gas that may be used as a heating medium within the fluid boiler systems as disclosed. Natural gas may include methane gas, propane gas, ethane gas, or combinations thereof, and may optionally include a measure of mercaptan or other additives for odorization.

The term “oxygen,” when used in connection with the present disclosure, refers to ambient air and its general composition, which may include gasses such as oxygen, nitrogen, carbon dioxide, and other trace gases. The term “oxygen” does not necessarily mean pure oxygen but rather the breathable air in the environment that supports combustion in the fluid boiler systems as disclosed.

Turning back to the present disclosure, the present disclosure relates generally to heating non-combustible fluids or aqueous fluids. More specifically, the present disclosure relates to tankless boiler systems for the heating of potable water for residential and commercial clients.

In one embodiment, the boiler system first comprises a housing. The housing is designed to provide structural support while ensuring ease of installation, maintenance, and adaptability. The housing may have an elongated geometry, and may comprise a six-sided or other polygonal enclosure. Beneficially, the housing comprises one or more removable panels that facilitate access to internal components. The one or more removable panels allow for efficient servicing of internal components without need for extensive disassembly. Furthermore, by providing one or more removeable panels on a front, right, left, and/or back side of the tankless boiler system, maintenance on the system may be conducted from all sides in the event that the boiler system is installed proximate other devices within a boiler room.

The panels may be fabricated from durable, corrosion-resistant materials suitable for high-temperature environments. Examples include aluminum, steel, or other metal alloys. Additionally, the housing may include adjustable leveling mechanisms, allowing it to be positioned on sloped or uneven surfaces, such as pitched floors in commercial boiler rooms. To enhance safety and functionality, the housing may incorporate integrated insulation to reduce heat loss and noise during operation. Further still, strategically placed ventilation openings may regulate airflow into and out of the system, ensuring optimal combustion efficiency while preventing overheating and providing an egress for potentially trapped combustible gases within the system. A compact and modular design of the housing enables drop-in replacement of existing boiler systems with minimal modifications, making it suitable for a wide range of residential and commercial applications. Further still, the compact and modular design of the housing may embody a smaller overall profile when compared to conventional tank-based boiler systems, thus allowing the presently disclosed systems to be retrofitted more easily in boiler rooms with spatial constraints.

The fluid boiler system also comprises a water line. The water line extends through a panel of the housing. The water line defines a cold water inlet and a heated fluid outlet. The cold water inlet is designed to facilitate seamless integration with existing plumbing systems, for example, existing feed water lines installed within a commercial boiler room may be directly connectable to the cold water inlet which may feature a 1 ½″ brass swing check valve oriented horizontally to ensure unidirectional flow and to prevent backflow of heated water into the cold water supply. The system may be designed with adjustable connections, enabling use of various pipe nipple lengths and unions to accommodate different installation configurations while maintaining required clearance distances for code compliance. The heated fluid outlet, which may also be equipped with a 1 ½″ female adapter, enables easy connection to existing hot water distribution networks without necessitating building-wide water shutoffs. Advantageously, these quick-connect features of the presently disclosed boiler systems permit rapid installation and ease of maintenance when compared to bulky, often oversized, conventional tank-based systems. In an alternate embodiment of the presently disclosed subject matter, one or more tankless boiler systems may be configured to work conjunctively or in series. In this embodiment, a heated fluid outlet of a first tankless boiler system may serve as a cold water inlet for a second tankless boiler system. In this configuration, a temperature of the water entering the second tankless boiler system will be greater than a temperature of the water entering the first tankless boiler system. This arrangement permits the second tankless boiler system to be set at a different heated fluid outlet temperature and, by receiving pre-warmed water from the first tankless boiler system, minimizes a temperature differential it must overcome. Consequently, water can be incrementally heated from the first to the second system, facilitating dual-output temperature functionality while also enabling production of hotter outlet water from the second system when compared to the first.

Additionally, the water line may include an internal recirculation loop. One or more flow sensors may be incorporated to optimize water flow efficiency and temperature consistency. A first-in, last-out piping configuration at each of one or more heat exchangers ensures equal flow distribution, eliminating a need for a linking cable between heat exchangers and thereby simplifying installation and operation.

To further enhance performance, an internal return pipe radiator restricts a portion of the heated water flow, maintaining a stable temperature differential (ΔT) while promoting efficient mixing and minimizing pressure drops. The system may also incorporate a temperature and pressure relief valve to ensure safe operation by discharging excess pressure or overheated water.

Further still, the fluid boiler system further comprises a gas line. The gas line also extends into the housing. The gas line defines a gas inlet in fluid communication with a gas source. In the present embodiment, the gas line receives natural gas as a primary fuel source for combustion. The system is configured to accommodate various gaseous fuels, including methane, ethane, propane, or combinations thereof, with an optional measure of mercaptan for odorization.

The gas line may be constructed from any suitable material designed to withstand system pressures, temperatures, and flow rates. For example, the gas line may be constructed from 1″ stainless steel piping to ensure durability and resistance to corrosion while supporting a range of BTU demands from, for example, 0 to 399,999 BTUs. A 1″ stainless steel gas manifold may be vertically affixed inside a top portion of the housing, with two sets of T-fittings designed to regulate proper volume and flow for multiple heat exchanger configurations. The system may further incorporate a 1″ stainless steel union at a rear upper right side of the housing, allowing for ease of installation and secure connection to existing gas infrastructure within, for example, a commercial boiler room, restaurant mechanical room, or hotel mechanical space. In an alternate configuration, an external gas manifold, e.g., a manifold positioned outside the housing, may be used to receive a single fuel source and distribute the fuel to the one or more heat exchangers within a single housing or distribute fuel to one or more tankless boiler systems each with one or more heat exchangers. In a further embodiment, each of the one or more heat exchangers of a given system may receive a respective gas line to permit dual-temperature functionality of the system via the one or more heat exchangers contained within the housing.

A gas burner is disposed along the gas line within the housing. The gas burner is configured to heat water along the water line. To protect the system from contaminants, a 1″ stainless steel drip leg may be installed at a bottom portion of the manifold to capture debris from external gas supply lines. The gas manifold transitions from 1″ T-fittings to ¾″ stainless steel piping, which extends downward within the enclosure to each gas burner. Each ¾″ gas feed line may be equipped with an individual shut-off valve, enabling precise gas pressure adjustments and independent isolation of each heat exchanger. The one or more gas burners per system, optimized for efficient combustion, utilize a fresh air intake and may include a gas pilot for reliable and/or remote ignition. In an alternate embodiment, the gas line may be configured to accommodate a secondary inlet gas connection, allowing for dual-temperature operation and independent fuel supply to multiple burners when required.

The fluid boiler system may further comprise a fresh air intake. The fresh air intake is configured to supply oxygen into the housing. The fresh air intake ensures proper combustion by delivering a controlled supply of oxygen to the one or more gas burners, optimizing efficiency while minimizing emissions. The fresh air intake may be pre-piped within the housing (alternatively referred to herein as an enclosure), with all heat exchanger air intakes combined into a single manifold for ease of installation. For example, a 3″ rubber “Fernco” coupling may be provided at the fresh air intake connection, allowing for quick installation or conversion to a glued-style fitting as needed.

In addition, the presently disclosed boiler systems may further comprise an exhaust air outlet. The exhaust air outlet may optionally include an exhaust fan. The exhaust air outlet may be similarly pre-piped, combining the exhaust from each heat exchanger into a unified manifold that directs combustion byproducts safely out of the one or more systems. In one embodiment, a high-efficiency exhaust fan may be integrated into the exhaust air outlet to regulate airflow, prevent backpressure, and maintain safe operating conditions. The exhaust air outlet may be designed to accommodate various venting configurations, including room air venting, concentric venting, or common venting, ensuring compatibility with different installation environments.

Those of ordinary skill in the art will understand that the term “room air venting” refers to a ventilation method that uses air from the space in which the tankless fluid boiler system is installed to support combustion. Room air venting typically involves the intake of air directly from a surrounding area and may require compliance with ventilation and air exchange standards to ensure sufficient airflow for safe and efficient operation of the system.

The term “concentric venting” refers to a venting configuration in which a smaller vent pipe is positioned concentrically inside a larger vent pipe. The smaller, inner vent pipe is used to exhaust combustion gases from the tankless fluid boiler system, while the larger, outer vent pipe simultaneously draws in fresh air for combustion. This design provides a sealed, compact, and efficient venting solution that minimizes air exchange with the surrounding environment.

The term “common venting” refers to a venting configuration in which multiple tankless fluid boiler systems are connected to a shared vent or flue. Common venting facilitates collective exhaustion of combustion gases from multiple systems through a single venting pathway and are designed to meet industry standards for backflow prevention, draft control, and system efficiency.

The boiler systems may also include a condensate drain and a drain valve. The condensate drain manages moisture generated during combustion. In one embodiment, each of the one or more heat exchangers features an individual condensate drain line that merges into a larger 1″ PVC manifold, which exits through a front lower portion of the enclosure. A union fitting at the condensate drain allows for multiple drainage configurations to ensure proper water flow and prevent buildup. The drain valve is strategically placed to facilitate easy maintenance, allowing for controlled removal of accumulated condensate without disrupting system operation. Furthermore, by being affixed at the front lower portion of the enclosure, the condensate drain more easily facilitates removal of condensate and other dense particulates from the system via gravity. Stated differently, condensate and particulates having a density greater than that of the feed water and the heated water may settle at the bottom portion of the enclosure and thus can be evacuated from the system by opening or throttling the drain valve affixed to the condensate drain line.

In the present embodiment, a control module may be affixed to the housing. In this embodiment, the control module may further comprise a controller configured to regulate operational parameters of the fluid boiler system, wherein water is heated on-demand without the use of a storage tank via the fluid boiler system. The control module provides precise regulation of key system functions, including ingress gas flow, gas burner cycling and operation, ingress water flow, egress water flow, water temperature, pressure levels, and operational cycles. Each of the one or more heat exchangers within the system may be equipped with its own individual external control display screen, ensuring redundancy and enabling independent adjustments if needed. In one embodiment, the display screens may be mounted at an angled position on an upper front portion of the enclosure for easy readability. The control module supports both manual and programmable operation, allowing users to configure temperature setpoints, monitor system diagnostics, and manage freeze protection features. For example, an 18/8 “Romex” low-voltage wiring harness may be installed within the enclosure, connecting the control modules while providing extra wiring capacity for redundancy and future servicing needs. Additionally, the system incorporates automatic flame failure detection, pressure monitoring, and overcurrent protection to enhance safety and reliability. An electrical power supply is routed through a 120 V, 50/60 Hz, 20 Amp outlet located at a bottom front portion of the enclosure, with an option to separate or combine power sources for increased redundancy. Further still, the one or more control modules may be configured with a diagnostic port connection such that the user may connect a diagnostic tool directly to the system for preventative maintenance, system status, and operational control.

In one embodiment, the fluid boiler system further comprises at least one shut-off valve. The shut-off valve may be positioned along the water line proximate the cold water inlet to facilitate maintenance and emergency shutdown procedures. In the present embodiment, the at least one shut-off valve may be configured to close in response to a signal from the controller when a threshold temperature within the housing or water line has been reached or exceeded. This safety feature helps prevent overheating, ensuring stable operation of the system throughout various load requirements. Further still, the shut-off valve may comprise a multi-position valve, permitting throttling and enhanced control of feed water into the system.

In an alternate embodiment, the control module is configured to allow users to set operational parameters, including a threshold temperature, a threshold pressure, or both. The control module provides real-time monitoring and adjustment capabilities, enabling precise control of system functions.

In one embodiment, the fluid boiler system further comprises at least one relief valve. The relief valve may be designed to mitigate excess pressure and temperature fluctuations, enhancing safety and reliability of the system. In the present embodiment, the at least one relief valve is positioned along the water line proximate the heated fluid outlet. The valve is configured to open automatically when a predefined threshold pressure or temperature is reached or exceeded. This feature helps prevent potential damage to the system and ensures continuous, safe operation. In an alternate embodiment, the one or more relief valves may be a normally-closed, manual-style relief valve. When the threshold temperature or threshold pressure is exceeded, the normally-closed, manual-style relief valve opens, permitting egress of pressurized fluid out of the system. When the temperature and/or pressure of the fluid returns to safe operating conditions, the normally-closed, manual-style relief valve closes and thus permits continuous operation of the system under its normal operating conditions.

In an alternate embodiment, the fluid boiler system may include a recirculation loop, which may also be referred to as an internal recirculation loop. The recirculation loop enhances water flow efficiency by redirecting a portion of the heated fluid back to the cold water inlet. This configuration improves heating consistency, reduces wait times for hot water, and optimizes system performance. As noted previously, the brass swing check valve affixed to the cold water inlet ensures unidirectional flow and prevents backflow of heated water into the cold water supply.

In one embodiment, the control module comprises a graphical user interface (GUI). The GUI is designed to allow an operator to adjust the output temperature of the fluid boiler system. Such interface provides an intuitive display of system parameters, alerts, and operational settings, enabling precise control and real-time monitoring.

In the present embodiment, the gas burner may further comprise a gas pilot. The gas pilot provides a reliable ignition source, ensuring consistent burner operation and reducing startup time. This feature enhances fuel efficiency and system responsiveness. In certain embodiments, the gas pilot may comprise either a hot-surface ignitor or an electronic ignitor, as these options generally offer superior efficiency and performance compared to a traditional gas pilot, which is less efficient and therefore not preferred.

In one embodiment, the fluid boiler system further comprises one or more flow sensors disposed proximate to or within the cold water inlet. Such sensors are in fluid communication with the controller and are configured to measure flow rate of feed water entering the system. The collected data is used to optimize heating cycles, regulate water pressure, and enhance overall efficiency.

In the present embodiment, the fluid boiler system may also include an electrical power supply and one or more valves to control the flow of gas through the gas inlet. The power supply provides energy for system components, including the control module, sensors, and electronic controls. The gas control valves are designed to regulate fuel flow with precision, ensuring efficient and safe combustion.

In an alternate embodiment, the fluid boiler system comprises an opening along the housing, an intake air fan positioned near the opening, and a heating element disposed proximate to the intake air fan. This configuration allows for pre-warming of intake air before combustion, improving efficiency and reducing thermal shock within the housing.

In contrast to conventional tank-based systems, the presently disclosed tankless boiler systems do not require an anode rod because the water is heated on-demand as it passes through the system rather than being stored. This key advantage eliminates concerns related to corrosion of welds, joints, and linings that are typically addressed in tank-based systems through use of at least one anode rod.

In a second embodiment of the presently disclosed subject matter, a fluid boiler system comprises a housing having a top, bottom, front, back, first side, and opposing second side, configured to enclose and support internal components of the fluid boiler system. The housing may include one or more removable panels to facilitate maintenance and component access. A water line may extend through the housing, comprising a cold water inlet and a heated fluid outlet. The cold water inlet integrates a 1 ½″ brass swing check valve installed inside or proximate the enclosure to allow for a seamless drop-in replacement with existing plumbing infrastructure. The heated fluid outlet may be similarly equipped with a 1 ½″ female adapter to enable the use of various pipe nipple lengths, ensuring compliance with clearance requirements and ease of connection to existing hot water distribution systems. Additionally, the system may further include an internal recirculation loop that enhances heating efficiency by redirecting a portion of the heated fluid back to the cold water inlet. A water flow control system, comprising a flow sensor and an electronic bypass control, monitors and adjusts a flow rate to, within, and out of the system dynamically based on heating or load demands.

A gas line extends into the housing, featuring a gas inlet that supplies fuel to one or more gas burners disposed along the gas line within the housing. The gas burners are designed to heat water efficiently as feed water moves through the system. In this embodiment, a secondary gas inlet connection may be present, allowing for dual-temperature functionality via multiple heat exchangers. This secondary gas inlet provides an independent gas supply to each of the one or more gas burners, ensuring optimal heating performance under variable load conditions. A gas manifold may consist of a 1″ stainless steel pipe with multiple T-fittings that transition to ¾″ stainless steel feed lines, each equipped with an individual shut-off valve for precise gas control. To protect the gas burners from contaminants, a 1″ stainless steel drip leg may be installed at a bottom of the manifold to capture debris from external gas supply lines.

To ensure proper combustion, the fluid boiler system may further comprise a fresh air intake that delivers oxygen into the housing. The intake system may feature an inlet air filter to prevent dust and debris from entering the housing and the one or more heat exchangers disposed within the housing. In one embodiment, a vent system is integrated to regulate airflow dynamically, optimizing combustion efficiency while maintaining safe operating temperatures. In an alternate embodiment, the system may comprise an intake fan, wherein the intake fan draws ambient air into the housing to create a positive internal pressure, which forces exhaust air out of the housing via an exhaust air outlet (described below). An intake fan motor capable of speed modulation controls an amount of air entering the system, a resulting pressurization level within the housing, and removal of exhaust from the housing.

As referenced above, the system may further comprise the exhaust air outlet to expel combustion byproducts, with at least one exhaust fan positioned on the side of the housing to direct air safely out of the system. The exhaust system may utilize, for instance, a 3″ rubber “Fernco” coupling, allowing for flexible installation or conversion to a glued fitting as needed. The fluid boiler system also includes a condensate drain and a drain valve to manage moisture produced during combustion. Each of the one or more heat exchangers has an individual condensation drain line that merges into a larger, 1″ PVC manifold, which exits at a bottom front portion of the enclosure for efficient, gravity-assisted drainage.

The system may further include one or more heat exchangers residing within the housing, designed to maximize thermal efficiency and provide uniform heating performance. A first-in, last-out piping configuration ensures equal water flow distribution across multiple heat exchangers, eliminating a need for a linking cable to manage communication between the one or more heat exchangers. Each of the one or more heat exchangers may be equipped with an internal flush valve, allowing for independent maintenance and cleaning without disrupting system operation. Additionally, a return pipe radiator may be incorporated to regulate temperature fluctuations and improve efficiency by partially restricting hot fluid flow, reducing ΔT between the inlet and outlet fluid flows, and ensuring consistent heating output.

The present embodiment may also comprise a control module affixed to the housing, providing centralized regulation of system functions. The control module may include a display screen and one or more user-operable buttons, enabling real-time monitoring and adjustments. Unlike simpler control interfaces, this embodiment allows both manual and programmable operation, providing automatic control over system parameters such as temperature and flow rate adjustments. A graphical user interface (GUI) enables precise temperature setpoint configurations, system diagnostics, and operational monitoring. Each of the one or more heat exchangers features an independent, external control display screen for redundancy, ensuring continued operation even if one module requires servicing. The control module may be connected via an 18/8 “Romex” low-voltage wiring harness, which includes extra wiring capacity for future redundancy or repairs. Further still, the control module may also be equipped with remote capabilities, allowing the operator to monitor and adjust system functionality without manipulating the control module affixed locally at the system.

An electrical power supply for the system may be routed through a dedicated 120 V, 50/60 Hz, 20 Amp outlet located at the bottom front portion of the housing. This power configuration allows for either a single external power source or separate power circuits for redundancy. Additional safety mechanisms include flame failure detection, overcurrent protection, and pressure monitoring. These features ensure stable operation, prevent hazardous conditions, and enhance longevity of system components.

In a third embodiment of the presently disclosed subject matter, a fluid boiler system comprises a tankless fluid boiler system designed to heat water on-demand without the use of a storage tank. The system includes a housing with one or more removable panels for maintenance and access, wherein the housing further comprises a top, bottom, front, back, first side, and opposing second side. The one or more removable panels provide ease of servicing, facilitating access to internal components such as one or more burners, gas lines, and heat exchangers while maintaining structural integrity and thermal insulation. A compact design of the housing ensures compatibility with existing installations, reducing a need for extensive modifications during retrofitting. Further still, internal framing may be disposed within the housing to further provide rigidity and strength to the system and support internal components.

The presently disclosed fluid boiler system further comprises an inlet gas connection arrangement for supplying natural gas to the gas burners associated with each heat exchanger. In one embodiment, a single inlet gas connection supplies natural gas to a 1″ stainless steel manifold, which then distributes the gas to each burner via multiple ¾″ gas feed lines, with each feed line equipped with its own shut-off valve. This configuration, which is the preferred embodiment, supports dual-temperature functionality by supplying the respective gas feed lines to the heat exchangers, thereby allowing them to operate at different temperatures. Alternatively, the system may be configured so that each heat exchanger receives natural gas either through its own dedicated inlet gas connection or via an independent manifold distribution system. In every configuration, a gas pilot assembly is affixed inline with the gas supply to ensure reliable ignition, and a flame failure monitoring system integrated into the control modules features an alarm function to alert users in the event of burner ignition failure or gas supply interruption.

To further support efficient combustion, the system includes a fresh air intake that delivers oxygen into the housing, ensuring an optimal air-to-fuel ratio. The fresh air intake may further comprise an adjustable airflow control, allowing the system to adapt to varying operating conditions. Further still, the fresh air intake may also be equipped with an inlet air filter to capture dust, debris, and other suspended particles from entering the system. Exhaust gases are expelled through at least one exhaust fan, which directs combustion byproducts safely out of the housing. The fluid boiler system further incorporates at least two vents, which may be configured as PVC connections, room air venting, concentric venting, or common venting, depending on installation requirements. This flexible venting design ensures compliance with diverse environmental and building code standards.

A water flow control system may also be present, comprising at least one water flow sensor and an electronic water control module. This system dynamically adjusts flow rates to optimize heating efficiency and maintain a consistent temperature of the heated fluid output from the system. The cold water inlet integrates a 1 ½″ brass swing check valve, ensuring unidirectional flow and preventing backflow of heated fluid into the feed water supply. At least one temperature relief valve and at least one pressure relief valve are positioned along the heated fluid outlet to prevent excessive pressure buildup and thermal overload, discharging water safely when necessary. Further still, sensors affixed to the cold water inlet may communicate with the control module to facilitate efficient ingress of feed water and seamless egress of heated fluid to connected systems.

The control module is affixed to the housing and includes a display screen with one or more user-operable buttons, enabling real-time monitoring and manual or automatic operation of the system. Each of the one or more heat exchangers may have its own dedicated external control module, allowing for independent adjustments of temperature, pressure, and flow rate. The control modules communicate via an 18/8 “Romex” low-voltage wiring harness, which provides redundancy in case of component failure. Additionally, the system may include a second control module, enhancing redundancy and allowing each module to regulate one or multiple heat exchangers within the housing. Further still, the one or more control modules may be removeable from the system for ease of replacement and service.

For safety and reliability, the fluid boiler system of the present disclosure may incorporate automatic freeze protection, preventing damage to internal components during low-temperature or start-up conditions. A variable-speed combustion fan with speed monitoring ensures efficient burner operation, while an overcurrent detection system prevents electrical failures by automatically shutting down the system if abnormal power fluctuations are detected. The electrical power supply is configured for a 120 V, 50/60 Hz, 20 Amp connection, with options for redundant wiring to enhance reliability. Alternate electrical supply configurations may also be employed to conform with building and installation codes, foreign building codes, and system requirements.

Turning to the figures, FIG. 1 shows a perspective view of a fluid boiler system 100, in one embodiment. The fluid boiler system 100 is designed for on-demand heating of aqueous fluids and is constructed in a compact, modular format ideally suited for commercial applications such as restaurants, hotels, and other facilities where space efficiency and rapid hot water delivery are critical. A housing 102 provides a protective enclosure and structural support for internal components of the system 100. The housing 102—alternatively described as an elongated housing or an enclosure—is preferably a six-sided structure with a substantially rectangular profile. Fabricated from durable, corrosion-resistant materials, the housing 102 incorporates integrated insulation and adjustable leveling feet 114, enabling installation on uneven or sloped surfaces, surfaces commonly found in boiler rooms and machinery spaces. A first removable panel 104 and a second removable panel 106 are incorporated into the housing 102 to permit ready access for maintenance and inspection; these panels 104, 106 are secured by one or more removable panel fasteners 105, ensuring that an operator can remove them easily without extensive disassembly.

In FIG. 1, the aqueous fluid—such as water—enters the fluid boiler system 100 via a cold water inlet 108 located above a bottom portion 116 of the housing 102, such as through removeable panel 106. The cold water inlet 108 is designed for seamless integration with existing plumbing systems and is equipped with a cold water swing check valve 109 that ensures unidirectional flow by preventing backflow of heated fluid. The cold water swing check valve 109 may also regulate a flow of feed water into the system 100. The fluid then travels through a water line, which comprises the cold water inlet 108 and a heated fluid outlet 130, toward one or more heat exchangers (shown at 150 and 152 in FIG. 7), where it is heated before being delivered to connected fixtures via the heated fluid outlet 130.

Shown proximate the cold water inlet 108 are a condensate drain line 110 and a temperature and pressure drain line 112. The condensate drain line 110 removes moisture and particulate having a density greater than the aqueous fluid, while the temperature and pressure drain line 112 discharges excess pressure or thermal by-products, thus maintaining optimal system balance. The housing 102 is further stabilized by the one or more adjustable feet 114 affixed to the bottom 116 of the enclosure 102.

Moving upward along the housing 102 from its bottom portion 116 to its top portion 118 (as seen in FIGS. 1 and 2), a first removable controller 120 and a second removable controller 122 are shown. The removeable controllers 120, 122 provide operational controls and system monitoring. The first removable controller 120 may serve as a primary user interface and enables rapid adjustments to system settings. Stated differently, in the present embodiment, the first removeable controller 120 may be classified as a parent controller, whereas the second removeable controller 122 may be classified as a child controller. In alternate embodiments, both the first removeable controller 120 and the second removeable controller 122 may be classified as master controllers for each of its respective heat exchangers (shown at 150 and 152 in FIG. 7). One or more user-operable buttons (shown at 121 in FIG. 3)—positioned on or adjacent to the controllers 120, 122—permit precise, immediate input from the operator, while a screen (shown at 123 in FIG. 3), which may be integrated within the controllers 120, 122, displays critical system parameters such as temperature and pressure. The controllers 120, 122 function interactively to ensure optimal system performance and can be easily maintained or replaced via manipulating the one or more removable controller fasteners (shown at 125 in FIG. 3).

Also positioned at the top portion 118 of the housing 102 is a temperature and pressure relief valve 124 that continuously monitors operating conditions; it automatically discharges water or reduces pressure when preset safety thresholds are exceeded, thereby protecting the system 100 from over-temperature and over-pressurization events. The fresh air intake 126 supplies a consistent, controlled volume of oxygen essential for efficient combustion, and the exhaust connection 128 channels combustion by-products away from and out of the fluid boiler system 100. The heated fluid outlet 130 is calibrated to deliver heated fluid at a consistent temperature to connected systems, such as dishwashers, sinks, or showers in a restaurant or hotel, while a gas inlet 132 provides a secure, steady supply of fuel for combustion. An electrical box 134 houses and protects sensitive control circuitry and wiring, and a temperature and pressure drain connection 136 facilitates removal of excess water and byproducts during maintenance and over-pressurization events. The temperature and pressure drain connection 136 is connected inline with the temperature and pressure relief valve 124 such that, in instances where excess pressure or temperature are automatically bled from the system 100, the temperature and pressure relief valve 124 opens and allows the excess water to exit through the temperature and pressure drain connection 136. The temperature and pressure drain connection 136 is further connected to the temperature and pressure drain line 112, which discharges the excess water safely from the system 100. This is more clearly shown in FIG. 7.

Moreover, the system 100 may integrate a transceiver within an internal control board (described in FIG. 8) that communicates through one or more wireless networks; this transceiver allows the operator to monitor system operation remotely, turn the system 100 on or off, adjust parameters, receive alerts for abnormal conditions (such as overheating, underheating, blockages, loss of pressure, or improper flow rates), and schedule maintenance without needing to physically access the system 100, an advantage for installations located in remote machinery rooms or behind commercial structures.

FIG. 2 shows a front elevation view of the fluid boiler system 100. In this view, the housing 102 is depicted with its removable panels 104, 106 secured by the one or more removable panel fasteners 105. The cold water inlet 108 and its associated swing check valve 109 are clearly positioned near the bottom portion 116 of the housing 102. The cold water inlet 108 may enter the housing 102 through removeable panel 106. The condensate drain line 110 and the temperature and pressure drain line 112 are prominently visible, ensuring that moisture and excess pressure are efficiently expelled. The adjustable feet 114 are located along the bottom portion 116 of the enclosure, while the top portion 118 supports the temperature and pressure relief valve 124, the fresh air intake 126, and the exhaust connection 128, all of which contribute to safe and efficient operation of the system 100.

Also in FIG. 2, the first and second removable controllers 120, 122 are affixed to a front of the housing 102. These controllers 120, 122 incorporate one or more user-operable buttons 121 and integrated screens 123 to provide an intuitive interface for the operator to monitor and adjust system settings in real time. The temperature and pressure relief valve 124 continues to regulate safety by maintaining optimal operating conditions, while the fresh air intake 126 and the exhaust connection 128 work in tandem to manage ingress and egress airflow necessary for efficient combustion within the system 100.

FIG. 3 shows an enlarged, perspective view of a portion of the fluid boiler system 100 as seen in FIGS. 1 and 2. In this detailed view, the top portion 118 of the housing 102 is displayed along with the first removable controller 120. The controller 120, with its buttons 121 and screen 123, facilitates precise control over system parameters. It is securely mounted by one or more removable controller fasteners 125, which also allow for easy replacement in the event of failure. This modularity supports scalability; additional controllers, such as controller 122, can be incorporated to manage further functionalities, such as those required by multiple heat exchangers.

FIG. 4 shows a rear elevation view of the fluid boiler system 100. In this view, the back 138 of the housing 102 is visible, along with a third removable panel 140, a fourth removable panel 142, and a fifth removable panel 144. Panels 140, 142, 144 are secured to the back 138 of the housing 102 via one or more removable panel fasteners 105, ensuring that the system 100 remains accessible for maintenance. The one or more adjustable feet 114 support the housing 102 at the bottom portion 116, and the temperature and pressure relief valve 124 is positioned at the top portion 118 to safeguard the system 100 by regulating critical parameters and discharging excess fluid and pressure. The fresh air intake 126 and the exhaust connection 128 are also visible in this view, providing effective ingress of intake air and expulsion of exhaust gases from the system 100.

FIG. 5 shows a top plan view of the fluid boiler system 100 as defined by the top portion 118 of the housing 102 (not shown in FIG. 5). Here, the temperature and pressure relief valve 124 monitors system safety, while the fresh air intake 126 and the exhaust connection 128 are arranged to promote optimal air circulation for efficient combustion. The heated fluid outlet 130 permits discharge of heated fluid out of the system 100 to connected end devices, and the gas inlet 132 marks an entry point for the fuel. The electrical box 134 and the temperature and pressure drain connection 136, as described above in reference to FIG. 1, are also shown.

FIG. 6 shows an enlarged, elevation view of a portion of the fluid boiler system 100 of FIG. 1. More specifically, FIG. 6 shows removable panel 106 which resides above the bottom portion 116 of the housing 102 (not shown in FIG. 6). In this view, the cold water inlet 108 is depicted along with its cold water swing check valve 109, which modulates ingress of aqueous fluid into the system 100. The condensate drain line 110 and the temperature and pressure drain line 112, which connects to the temperature and pressure relief valve 124 via the temperature and pressure drain connection 136, function together to remove accumulated by-products and over-pressurized fluid from the system 100. The one or more adjustable feet 114 are positioned near the bottom portion 116 of the housing 102, providing a stable base for the entire assembly.

FIG. 7 shows a first front perspective view of the internal components of the fluid boiler system 100, configured in a first embodiment featuring two heat exchangers 150, 152. In this view, cold water (supply fluid or the aqueous fluid) enters via the cold water inlet 108 with its associated swing check valve 109 ensuring unidirectional flow of cold water supply into the system 100 while also preventing backflow of heated fluid intended to exit the system 100 via the heated fluid outlet 130. The fluid then travels through the water line toward the heat exchangers 150, 152, where it is heated in coils via one or more gas burners (not shown) before being delivered to downstream fixtures (e.g., sinks, showers, dishwashers in restaurants or hotels) via the heated fluid outlet 130. The condensate drain line 110 and the temperature and pressure drain line 112 facilitate removal of condensate and excess pressure from the system 100, respectively, during both normal operation and during periods of maintenance by the operator. Vertical limits of the system 100 are defined by the bottom 116 and top 118 portions of the housing 102 (removed for illustrative purposes). The temperature and pressure relief valve 124, which comprises part of the water line and is connectable to the heated fluid outlet 130, continuously monitors and regulates system conditions, while the fresh air intake 126 and the exhaust connection 128 ensure a proper air-to-fuel ratio for efficient combustion by the one or more gas burners disposed along the gas line (not shown) within the system 100. Although not shown in the present figure, it is to be understood that the fresh air intake 126 may comprise an inlet air valve and an intake air fan to draw fresh, ambient air into the system 100.

Centrally located are two heat exchangers—the first heat exchanger 150 and the second heat exchanger 152 —designed to receive the supply fluid from the cold water inlet 108 and to transfer heat from the combustion of fuel to the fluid. These heat exchangers 150, 152 are powered by a 120 V internal power supply 160, and an internal return line 162 recirculates the heated fluid back through the system 100, enhancing efficiency and modulating an outlet temperature of the heated fluid by mixing the heated fluid with supply fluid as needed. Intermediate supports 170, 172 and internal framing 174 reinforce the structural integrity and precise alignment of the internal components within the system 100. Lastly, the temperature and pressure drain connection 136 is shown affixed to the top portion 118 of the fluid boiler system 100 and serves in discharging excess fluid and pressure via the temperature and pressure drain line 112 when the temperature and pressure relief valve 124 opens.

FIG. 8 shows a tankless fluid boiler system 200 in an alternate embodiment. In this embodiment, the fluid boiler system 200 is provided with one or more removable panel fasteners 205 that secure one or more removable panels, such as a first, rear removeable panel 240 or panels 104, 106, 140, 142, 144 as described above, for easy access during maintenance. It is to be understood that additional removeable panels may be affixed to the tankless fluid boiler system 200 of the present embodiment; however, such additional removeable panels have been removed for illustrative purposes and to show various internal components of the fluid boiler system 200. Vertical limits of a housing 202 are defined by a bottom 216 and a top 218 portion. An internal control board 220 may be utilized to coordinate system operations by processing signals from various sensors, controllers, and at least one transceiver. The transceiver communicates with a remote device via one or more wireless networks, allowing an operator to monitor system operation, remotely power the system 200 on or off, adjust parameters, and receive alerts regarding abnormal conditions such as overheating, underheating, blockages, loss of pressure, or improper flow rates. The temperature and pressure relief valve 224 continuously monitors operating conditions and regulates safety by discharging excess water or reducing pressure within the system 200. A fresh air intake 226 and an exhaust connection 228, shown proximate the top portion 218 of the housing 202, collaborate to manage combustion airflow efficiently. A back 238 of the enclosure 202 is shown with the first, rear removable panel 240 which offers further access to internal components. It is to be understood that additional removeable panels may be affixed to the housing 202 via the one or more removeable panel fasteners 205, however, such panels have been removed for illustrative purposes. A single heat exchanger—heat exchanger 250—is strategically positioned to transfer thermal energy from the combustion of natural gas to the aqueous fluid. Additionally, an internal (radiator) return line 262 recirculates the heated fluid back through the system 200, while an intermediate support 272 and internal framing 274 secure the assembly, ensuring robust structural integrity.

The fluid boiler systems 100, 200 operate based on various heating output and load requirements and are adaptable to different configurations, sizes, and heat loads to meet specific user needs. The fluid boiler system may be designed as a stand-alone device, a replacement device, or a retrofit device. Further still, the fluid boiler system of the present disclosure may be adapted for residential use. Additionally, the fluid boiler systems disclosed herein may be configured in a variety of arrangements, including multiple systems employed concurrently, in series, in parallel, or in other tandem configurations, to achieve specific heating requirements.

The fluid boiler systems 100, 200 may feature adjustable components to accommodate a variety of installation requirements, internal flush valves for individual heat exchanger maintenance, an internal return pipe radiator for optimized hot fluid flow and temperature control, temperature and pressure relief mechanisms, condensation drain piping, and individual, external control display screens for each of the one or more heat exchangers. Systems 100, 200 are engineered, designed, and manufactured to ensure ease of installation, operational efficiency, redundancy in system components, and minimal modifications to existing infrastructure.

As previously stated, detailed embodiments of the presently disclosed subject matter are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the subject matter that may be embodied in various forms. It will be appreciated that many modifications and other variations stand within the intended scope of this subject matter as claimed below. In addition, “a” does not mean “one and only one;” “a” can mean “one and more than one.”

While the disclosure provides certain specific embodiments, the presently disclosed subject matter is not limited to those embodiments. A person of ordinary skill in the art will appreciate from the description herein that modifications can be made to the described embodiments and therefore that the specification is broader in scope than the described embodiments. All examples are therefore non-limiting.

EXEMPLARY EMBODIMENTS

Embodiment 1: A fluid boiler system comprising an elongated housing, a water line extending through the housing, wherein a cold water inlet is disposed at a first end of the water line and a heated fluid outlet is disposed at a second, opposing end of the water line, a gas line extending into the housing, the gas line having a gas inlet and a gas burner disposed along the gas line within the housing, and wherein the gas burner is configured to heat water along the water line. The fluid boiler system of the present embodiment further comprising a fresh air intake configured to supply oxygen into the housing, an exhaust air outlet, the exhaust air outlet further comprising an exhaust fan, a condensate drain and respective drain valve, and a control module affixed to the housing, the control module comprising a controller configured to regulate operational parameters of the fluid boiler system, wherein water is heated in real time without use of a storage tank.

Embodiment 2: The fluid boiler system of Embodiment 1, wherein the housing comprises at least one removable panel to facilitate access to internal components, and the control module comprises a graphical user interface.

Embodiment 3: The fluid boiler system of any one of the preceding Embodiments, wherein the gas line receives natural gas.

Embodiment 4: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises at least one shut-off valve.

Embodiment 5: The fluid boiler system of any one of the preceding Embodiments, wherein the at least one shut-off valve resides along the water line proximate the cold water inlet, and is configured to close in response to a signal from the controller that a threshold temperature within the housing or in the water line has been reached or exceeded.

Embodiment 6: The fluid boiler system of any one of the preceding Embodiments, wherein the control module is configured to provide operational setting of the threshold temperature and the threshold pressure.

Embodiment 7: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises at least one relief valve.

Embodiment 8: The fluid boiler system of any one of the preceding Embodiments, wherein the at least one relief valve resides along the water line proximate the heated fluid outlet, and is configured to open automatically when (i) the threshold pressure in the water line has been reached or exceeded, (ii) the threshold temperature within the housing or in the water line has been reached or exceeded, or (iii) both.

Embodiment 9: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises a recirculation loop.

Embodiment 10: The fluid boiler system of any one of the preceding Embodiments, wherein the graphical user interface is configured to allow an operator to adjust an output temperature of the fluid boiler system.

Embodiment 11: The fluid boiler system of any one of the preceding Embodiments, wherein the gas burner comprises a gas pilot.

Embodiment 12: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises one or more flow sensors disposed proximate the cold water inlet and in fluid communication with the controller, the one or more flow sensors configured to measure the flow of water into the fluid boiler system.

Embodiment 13: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises an electrical power supply, and one or more valves to control the flow of gas through the gas inlet.

Embodiment 14: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises an opening along the housing, an intake air fan positioned proximate the opening along the housing, and a heating element disposed proximate the intake air fan configured to warm the air discharged by the intake air fan as the air enters the housing.

Embodiment 15: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system comprises a housing having a top, bottom, front, back, first side, and opposing second side, a water line extending through the housing, the water line having a cold water inlet and a heated fluid outlet, a gas line extending into the housing, the gas line having a gas inlet and one or more gas burners disposed along the gas line within the housing, wherein the one or more gas burners is configured to heat water along the water line. The fluid boiler system of the present Embodiment further comprising a fresh air intake configured to supply oxygen into the housing, wherein the fresh air intake further comprises an inlet air filter, an exhaust air outlet, and wherein the exhaust air outlet further comprises an exhaust fan. Further, the fluid boiler system comprises a secondary gas inlet connection, a condensate drain, a drain valve, an electrical power supply, one or more control modules affixed to the housing, the one or more control modules further comprising a display screen and one or more user-operable buttons, wherein the one or more control modules is configured to cycle operation of the fluid boiler system based on specific heat loads, flow rates, and operational requirements, and a water flow control system, the water flow control system further comprising a water flow sensor and an electronic bypass control, wherein water is heated in real time without use of a storage tank.

Embodiment 16: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises one or more heat exchangers residing within the housing.

Embodiment 17: The fluid boiler system of any one of the preceding Embodiments, wherein the secondary gas inlet (i) permits dual temperature functionality via the one or more heat exchangers, and (ii) provides individual natural gas supply to the one or more internal gas burners.

Embodiment 18: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises at least one exhaust fan residing along a wall of the housing configured to direct air out of the housing.

Embodiment 19: The fluid boiler system of any one of the preceding Embodiments, wherein the one or more control modules is capable of (i) manual operation, and (ii) programmable operation for automatic temperature, pressure, and flow control to, within, and out of the housing of the fluid boiler system.

Embodiment 20: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises a tankless fluid boiler system, the tankless fluid boiler system comprising a housing having one or more removable panels for maintenance and access to internal components, the housing further comprising a top, bottom, front, back, first side, and opposing second side. The fluid boiler system of the present Embodiment further comprising an inlet gas connection and a secondary inlet gas connection to supply natural gas into the housing, one or more gas burners disposed along a gas line, a fresh air intake, a cold water inlet, a heated fluid outlet, at least one exhaust fan, a water flow control system comprising at least one water flow sensor, at least one electronic water control module, a temperature and pressure relief valve, a control module with a display screen and one or more user-operable buttons, automatic freeze protection, flame failure detection, and pressure monitoring systems, an electrical power supply, and a combustion fan with speed monitoring and overcurrent detection capabilities, wherein water is heated in real time without use of a storage tank.

Embodiment 21: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises a second control module, each of the control modules capable of individually controlling one or more heat exchangers contained within the housing, and further capable of manual and automatic operation to regulate output temperature, pressure, and flow rate of the heated fluid.

Embodiment 22: The fluid boiler system of any one of the preceding Embodiments, wherein the flame failure monitoring system further comprises an alarm function displayable on the one or more control modules.

Embodiment 23: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises one or more gas pilot assemblies affixed inline with the inlet gas connection, the secondary inlet gas connection, and the one or more gas burners.

Embodiment 24: The fluid boiler system of any one of the preceding Embodiments, wherein the system incorporates an overcurrent detection system to prevent electrical failures.

Embodiment 25: The fluid boiler system of any one of the preceding Embodiments, wherein the fluid boiler system further comprises at least two vents residing along the housing.

Embodiment 26: The fluid boiler system of any one of the preceding Embodiments, wherein the at least two vents are selected from a combination of a PVC connection, room air venting, concentric venting, and common venting.

Embodiment 27: The fluid boiler system of any one of the preceding Embodiments, wherein the one or more control modules further comprise a transceiver that communicates through one or more wireless networks, and wherein the transceiver allows an operator to monitor and adjust the system remotely.

Embodiment 28: The fluid boiler system of any one of the preceding Embodiments, wherein the transceiver is contained within the housing of the fluid boiler system, and the transceiver is in electrical or wireless communication with the one or more control modules.

Embodiment 29: The fluid boiler system of any one of the preceding Embodiments, wherein the transceiver is capable of communicating among one or more fluid boiler systems, and wherein the one or more fluid boiler systems work together to produce heated fluid.

Embodiment 30: The fluid boiler system of any one of the preceding Embodiments, wherein the transceiver permits remote control and remote monitoring of the one or more fluid boiler systems.