ClassID:

157877

F24D12/02 - CPC Classification

Classification description:

Other central heating systems having more than one heat source

Recent Application in this class:
#1
20260153253
2026-06-04

HYBRID HEATING SYSTEM WITH HUMIDITY CONTROL

#2
20260055901
2026-02-26

THREE-PIPE THERMAL NETWORK

#3
20250146676
2025-05-08

HEAT SUPPLY NETWORK FOR A PROCESS PLANT, AND METHOD FOR OPERATING SUCH A HEAT SUPPLY NETWORK

#4
20250116436
2025-04-10

MULTI-ENERGY COUPLED COOLING/HEATING SYSTEM FOR BUILDINGS IN LONG-TERM COOLING REGION AND OPERATION METHOD

#5
20240019831
2024-01-18

SYSTEM FOR OPTIMIZING THERMAL ENERGY GENERATION FROM MULTIPLE ENERGY SOURCES

#6
20230204225
2023-06-29

NETWORKED BOILER SYSTEM

#7
20230003420
2023-01-05

SYSTEMS, APPARATUS, AND METHODS FOR REMOTE CONTROL OF A PLURALITY OF HEATING DEVICES

#8
20220196251
2022-06-23

Device and method for converting solar PV energy into thermal energy storage using combined heat-pump and resistive heating elements in water heater

#9
20220107095
2022-04-07

Micro-combined heat and power system with exterior generator and heating system compatibility and method of use

#10
20220097484
2022-03-31

Fluid heating system

#11
20210262708
2021-08-26

Heat pump and method for controlling operation of boiler based on temperature of fluid

#12
20210239370
2021-08-05

Heat pump and method for controlling compressor based on operation of boiler

#13
20210239326
2021-08-05

Energy-saving system using electric heat pump to deeply recover flue gas waste heat from heat power plant for district heating

#14
20210190328
2021-06-24

COMBINED HEATING AND COOLING SYSTEM

#15
20210123607
2021-04-29

THERMALLY ENHANCED HEATING

#16
20210095896
2021-04-01

Building Designs and Heating and Cooling Systems

#17
20210055004
2021-02-25

FUEL-FIRED APPLIANCE WITH THERMOELECTRIC-POWERED ELECTRIC HEATING DEVICE

#18
20200318836
2020-10-08

System and method for controlling a variable-speed appliance circulator

#19
20200049426
2020-02-13

Flue Gas Energy Recovery System and Method

#20
20190219308
2019-07-18

ENERGY CHASSIS AND ENERGY EXCHANGE DEVICE

#21
20190137189
2019-05-09

Stratifier for tank-type water heater

#22
20190137116
2019-05-09

Fuel cell heater system

#23
20190107295
2019-04-11

Device and Method For Configuring a Multivalent Energy Supply Installation

#24
20190086102
2019-03-21

Hot-water supply unit and hot-water supply system

#25
20190024947
2019-01-24

Building designs and heating and cooling systems

#26
20180372343
2018-12-27

Water heating system including multi-function heat source apparatus

#27
20180356105
2018-12-13

Modeling method of combined heat and power optimal dispatching model

#28
20180216834
2018-08-02

Manifold, a buffer tank comprising the manifold, and a method for operating a heat exchange system

#29
20180135869
2018-05-17

Fuel-fired appliance with thermoelectric-powered secondary electric heating

#30
20180135868
2018-05-17

Modulation control of hydronic systems

#31
20180119965
2018-05-03

MULTI-PIPE-SWITCHING HEAT EXCHANGE APPARATUS

#32
20180112891
2018-04-26

Water heating system

#33
20180080664
2018-03-22

Multiway valve with bypass circuit

#34
20170248039
2017-08-31

Co-generation system and associated method

#35
20170241650
2017-08-24

METHOD AND APPARATUS FOR COMBINED HEAT AND POWER GENERATION

#36
20170241649
2017-08-24

HEAT STORING AND HEAT TRANSFER SYSTEMS

#37
20170234550
2017-08-17

Combined hot water and air heating and conditioning system including heat pump

#38
20170211821
2017-07-27

Networked boilers and control method

#39
20170167735
2017-06-15

System and method of controlling condensing and non-condensing boiler firing rates

#40
20170138639
2017-05-18

Building designs and heating and cooling systems

#41
20170138612
2017-05-18

HEAT AND ENERGY RECOVERY AND REGENERATION ASSEMBLY, SYSTEM AND METHOD

#42
20170130971
2017-05-11

Networked boiler system and method

#43
20170122576
2017-05-04

Gas fired modular blower control and associated methodology

#44
20170122573
2017-05-04

Geothermal system having a flow vector assembly

#45
20170067652
2017-03-09

Hybrid heat pump system

#46
20170059187
2017-03-02

Solar Energy Attic Air Heat Reservoir System

#47
20170045238
2017-02-16

METHOD FOR OPERATING A HEAT PUMP WATER HEATER APPLIANCE

#48
20170003036
2017-01-05

Apparatus and method for heating air at an air treatment device

#49
20160341434
2016-11-24

Air conditioning system

#50
20160273784
2016-09-22

METHOD FOR AUTONOMOUS OPERATION OF RADIATOR AND APPLIANCE MICROBOILER

#51
20160265794
2016-09-15

Heat pump water heater and control method thereof

#52
20160245552
2016-08-25

Building designs and heating and cooling systems

#53
20160061508
2016-03-03

Apparatus and method for hybrid water heating and air cooling and control thereof

#54
20160061502
2016-03-03

Apparatus and method for hybrid water heating and air cooling and control thereof

#55
20160054008
2016-02-25

Water heater having a waterway changeover control apparatus and method for operating the same

#56
20150377495
2015-12-31

METHOD FOR AUTONOMOUS OPERATION OF RADIATOR AND APPLIANCE MICROBOILER

#57
20150338109
2015-11-26

AUXILIARY HEATING ASSEMBLY FOR USE WITH RESIDENTIAL AIR HANDLERS

#58
20150316295
2015-11-05

Energy chassis and energy exchange device

#59
20150219370
2015-08-06

Heat pump apparatus

#60
20150219343
2015-08-06

Air conditioning system

#61
20150219342
2015-08-06

Air conditioning system

#62
20150168018
2015-06-18

Building-integrated solar thermal micro-channel absorber and method of manufacturing thereof

#63
20150159914
2015-06-11

Solar energy system

#64
20150159885
2015-06-11

Solar energy system

#65
20150122901
2015-05-07

Wear-leveling for components of an auxiliary heat source

#66
20150107537
2015-04-23

Recovery system of waste heat from flue gas

#67
20150104725
2015-04-16

Combined fuel cell and boiler system

#68
20150090803
2015-04-02

Air conditioning system

#69
20150069756
2015-03-12

Combined power and heating station

#70
20150064408
2015-03-05

Method for manufacturing shaped product with maintained isotrophy

#71
20140252100
2014-09-11

Gas fired modular blower control and associated methodology

#72
20140238466
2014-08-28

Toland's heating system

#73
20140203093
2014-07-24

Multi-tank water heater systems

#74
20140203092
2014-07-24

COMMUNICATING THERMOSTAT RECOVERY ALGORITHM

#75
20140137851
2014-05-22

Common venting system for water heaters and method of controlling the same

#76
20140102124
2014-04-17

Hybrid heating system

#77
20140083648
2014-03-27

DEDICATED OUTDOOR AIR SYSTEM WITH PRE-HEATING AND METHOD FOR SAME

#78
20140041406
2014-02-13

Broadband heat pump system

#79
20130337354
2013-12-19

Power generation system and method of operating the same

#80
20130328322
2013-12-12

Non-to-minimally fractionalized biomass-fueled renewable energy

#81
20130319014
2013-12-05

Room air conditioner having a liquid-to-air heat exchanging device with peltier elements

#82
20130299600
2013-11-14

WATER HEATER HAVING IMPROVED TEMPERATURE CONTROL

#83
20130291809
2013-11-07

Domestic combined heat and power system

#84
20130248609
2013-09-26

Heating system and method for controlling a heating system

#85
20130219894
2013-08-29

Heating system—modular

#86
20130180266
2013-07-18

Heat pump system with auxiliary heat exchanger

#87
20130099014
2013-04-25

System and method of controlling condensing and non-condensing boiler firing rates

#88
20130061821
2013-03-14

COMBUSTION APPARATUS

#89
20130048745
2013-02-28

Modulation control of hydronic systems

#90
20130037019
2013-02-14

WATER HEATER WITH INTERMITTENT ENERGY SOURCE

#91
20130019816
2013-01-24

FUEL-FIRED WATER HEATER WITH AIR DRAFT INDUCER AND FLUE HEAT EXCHANGER

#92
20130014530
2013-01-17

HEAT RECOVERY SYSTEM

#93
20120271466
2012-10-25

System and method for controlling hydronic systems having multiple sources and multiple loads

#94
20120248212
2012-10-04

Methods and Systems for Controlling a Hybrid Heating System

#95
20120210732
2012-08-23

Arrangement for air conditioning rooms and heat pump unit for use in the arrangement

#96
20120192577
2012-08-02

Wear-leveling for components of an auxiliary heat source

#97
20120160472
2012-06-28

Method for controlling a parallel operation of a multi-water heater

#98
20120135321
2012-05-31

Boiler unit

#99
20120103280
2012-05-03

VARIABLE FLOW HEATING SYSTEM WITH HEATING ACCESSORIES PLACED IN SERIES

#100
20120103279
2012-05-03

METHOD AND APPARATUS FOR DRAINING CONDENSATE FROM A GAS WATER HEATER EXHAUST SYSTEM

#101
20120095614
2012-04-19

ELECTRONIC CONTROL DEVICE AND METHOD FOR BOILER SYSTEM

#102
20120091214
2012-04-19

Controller for recreational-vehicle heating system

#103
20120090598
2012-04-19

Water heater having a waterway changeover control apparatus and method for operating the same

#104
20120085339
2012-04-12

System to Lower Emissions and Improve Energy Efficiency on Fossil Fuels and Bio-Fuels Combustion Systems

#105
20120018129
2012-01-26

TEMPERATURE ADJUSTING APPARATUS, FLUID SUPPLY SYSTEM, HEATING SYSTEM, INSTALLATION METHOD OF TEMPERATURE ADJUSTING APPARATUS, AND FLUID SUPPLY METHOD

#106
20110296838
2011-12-08

HEAT SOURCE MACHINE

#107
20110272117
2011-11-10

Energy chassis and energy exchange device

#108
20110265974
2011-11-03

METHODS AND EQUIPMENT FOR HEATING AND COOLING BUILDING ZONES

#109
20110265972
2011-11-03

METHODS AND EQUIPMENT FOR GEOTHERMALLY EXCHANGING ENERGY

#110
20110265502
2011-11-03

HIGH-EFFICIENCY HEAT PUMPS

#111
20110265499
2011-11-03

CONTROLS FOR HIGH-EFFICIENCY HEAT PUMPS

#112
20110203788
2011-08-25

Hot water supply apparatus and heat medium control method

#113
20110203576
2011-08-25

Heat generator group with jet pump flow circuit control

#114
20110192393
2011-08-11

Building-integrated solar thermal micro-channel absorber and method of manufacturing thereof

#115
20110180023
2011-07-28

Burner for the Combustion of Hydrogen on a Catalyst and Boiler for said Burners

#116
20110172830
2011-07-14

System and method for controlling hydronic systems having multiple sources and multiple loads

#117
20110083462
2011-04-14

DEVICE FOR OBTAINING HEAT

#118
20110082593
2011-04-07

System and method for controlling hydronic systems having multiple sources and multiple loads

#119
20110077781
2011-03-31

System and method for controlling hydronic systems having multiple sources and multiple loads

#120
20110073669
2011-03-31

APPARATUS AND METHOD FOR ENERGY RECOVERY

#121
20110067650
2011-03-24

WATER HEATER MODULE HAVING DETACHABLE HEAT EXCHANGER

#122
20110067436
2011-03-24

Air conditioning system

#123
20110048404
2011-03-03

HEATING SYSTEM

#124
20110048016
2011-03-03

Energy-recovery system for a production plant

#125
20110030673
2011-02-10

Hot water supply system

#126
20110024513
2011-02-03

Diverter valve and heating system

#127
20110016898
2011-01-27

HEATER

#128
20110005253
2011-01-13

Absorption heat pump with a thermally insulating dividing wall

#129
20100330512
2010-12-30

Multi-boiler and control method thereof for preventing back flow of exhaust gas

#130
20100326622
2010-12-30

METHODS AND EQUIPMENT FOR GEOTHERMALLY EXCHANGING ENERGY

#131
20100326099
2010-12-30

HIGH-EFFICIENCY HEAT PUMPS

#132
20100319378
2010-12-23

Hot-water storage type hot-water supply device and hot-water storage type heating and hot-water supply device

#133
20100293982
2010-11-25

Heating and air-conditioning installation with a heat pump, the installation including at least one heat transfer fluid distributor unit with coupling to a plurality of heat collection and delivery circuits

#134
20100281899
2010-11-11

Gas-fired heat pump water heater

#135
20100251973
2010-10-07

Fluid heating system

#136
20100199975
2010-08-12

Solar thermal collector cabinet and system for heat storage

#137
20100187320
2010-07-29

METHODS AND SYSTEMS FOR RECOVERING AND REDISTRIBUTING HEAT

#138
20100186926
2010-07-29

Wasted heat recovery

#139
20100178043
2010-07-15

Cogeneration system using surplus electrical current

#140
20100114384
2010-05-06

CONTROLS FOR HIGH-EFFICIENCY HEAT PUMPS

#141
20100108290
2010-05-06

METHODS AND EQUIPMENT FOR HEATING AND COOLING BUILDING ZONES

#142
20100083950
2010-04-08

SOLAR ENERGY WATER HEATING SYSTEM

#143
20100065040
2010-03-18

Heating and cooling system

#144
20100047645
2010-02-25

COGENERATION SYSTEM

#145
20100031820
2010-02-11

Apparatus and method for energy recovery

#146
20100018668
2010-01-28

CO2 BASED DISTRICT ENERGY SYSTEM

#147
20100003552
2010-01-07

SOFC power system with A/C system and heat pump for stationary and transportation applications

#148
20100001087
2010-01-07

Variable output heating control system

#149
20090320503
2009-12-31

Cogeneration system

#150
20090295157
2009-12-03

Cogeneration system

#151
20090293862
2009-12-03

Solar thermal collector cabinet and system for heat storage

#152
20090287355
2009-11-19

System and method for controlling hydronic systems having multiple sources and multiple loads

#153
20090277618
2009-11-12

CONDENSATE HEAT EXCHANGER

#154
20090229268
2009-09-17

COGENERATION SYSTEM

#155
20090224062
2009-09-10

Increased efficiency heating system method and apparatus for concrete production

#156
20090205266
2009-08-20

Modularized Self-sustaining Building System

#157
20090180765
2009-07-16

Multiple-power-selection heat storage device

#158
20090159718
2009-06-25

Building designs and heating and cooling systems

#159
20090159259
2009-06-25

Modular heat pump liquid heater system

#160
20090159076
2009-06-25

SOLAR ENERGY SAVING SYSTEM USING GAS AND ELECTRICITY AS COMPENSATION

#161
20090151654
2009-06-18

Water heater

#162
20090144754
2009-06-04

Bios routine avoidance

#163
20090125150
2009-05-14

System and method for control of heat system operation by changing a switching set point of operation

#164
20090120923
2009-05-14

Water heater of endorsement with ionized ignition and electronic control of temperature, for solar heaters of the type thermosiphon

#165
20090120616
2009-05-14

Energy re-claimer

#166
20090050077
2009-02-26

Mutually convertible boiler between normal type and condensing type

#167
20080261093
2008-10-23

Heat and power system combining a solid oxide fuel cell stack and a vapor compression cycle heat pump

#168
20080179416
2008-07-31

MODULATION CONTROL OF A HYDRONIC HEATING SYSTEM

#169
20080179415
2008-07-31

Hydronic heating system

#170
20080149301
2008-06-26

Reducing cost of heating and air-conditioning

#171
20080105755
2008-05-08

High-thermal-mass hydronic furnace

#172
20080054082
2008-03-06

Climate control system including responsive controllers

#173
20080023565
2008-01-31

Hot water supply system

#174
20080023564
2008-01-31

Method And Apparatus For Centrally Controlling A Hybrid Furnace, Heater, And Boiler System Installation

#175
20080022946
2008-01-31

Combined hot water supply system

#176
20070295830
2007-12-27

Modular boiler control

#177
20070246555
2007-10-25

Heat Conveyance System

#178
20070158048
2007-07-12

External flue heat exchangers

#179
20070144458
2007-06-28

Cascade unit for a heating system with two or more heating boilers

#180
20070137641
2007-06-21

Combination heat recovery—solar collector

#181
20070068162
2007-03-29

Control system and control method for cogeneration system

#182
20070051820
2007-03-08

Heat recovery apparatus

#183
20070044501
2007-03-01

Temperature control in a space served by multiple HVAC equipment

#184
20070028611
2007-02-08

Domestic combined heat and power assembly

#185
20060144347
2006-07-06

Heat exchanger suitable for a boiler, and a boiler including such a heat exchanger

#186
20050284946
2005-12-29

Cogeneration system and energy supply system

#187
20050230491
2005-10-20

Multi-stage boiler system control methods and devices

#188
20050230490
2005-10-20

Multi-stage boiler staging and modulation control methods and controllers

#189
20050224073
2005-10-13

Fireplace augmented chimney heat exchange system

#190
20050193412
2005-09-01

Potable water heater and method of using same

#191
20050161521
2005-07-28

System and method for hydronic space heating with electrical power generation

#192
20050150650
2005-07-14

Heat pump control system and method of operating to provide automatic backup heating modes

#193
20050100851
2005-05-12

Fuel cell system for generating electric energy and heat

#194
18894032
2025-08-05

Collaborative optimization method, system, equipment and storage medium for electric and heating networks and building user

#195
18106397
2023-11-07

Process for providing residential heating comfort during winter months without using fossil fuels as an energy source

#196
17822014
2024-12-10

HVAC apparatus, method, and system

#197
17193695
2024-10-22

System and method for heat and energy recovery and regeneration

#198
14199336
2018-09-11

HVAC apparatus, method, and system