157847 ⎘
Central heating systems employing combinations of heat transfer fluids covered by two or more of groups -
Sub-classes:AUTOMATICALLY SWITCHING A COMBI RADIATOR
#2Air heating apparatus
#3AIR HEATING APPARATUS
#4Heating system, kit and method of using
#5CLOSED LOOP HEATING SYSTEM
#6Combined space conditioning or heating and water heating system
#7Air handler unit including a smart valve
#8Method of controlling a variable delivery pump fitted to a heating system
#9Rooftop hydronic heating unit
#10GROUND-TO-AIR HEAT PUMP SYSTEM
#11SECONDARY HEATING AND COOLING SYSTEM
#12METHOD FOR THE TRANSPORT OF HEAT ENERGY AND APPARATUS FOR THE CARRYING OUT OF SUCH A METHOD
#13Secondary heating system
#14Heat source for radiant heating system