Heating system

Claim 1

A heating system having communicating means leading to space to be heated comprising means defining a closed compartment with at least one gas burner assembly disposed in the compartment, said burner assembly having a high heat conducting and radiating flue gas discharge wall facing the interior of said compartment, said wall containing multiple perforations, a heating coil in said compartment at least in closely adjacent radiant heat exchange with said wall and extending planar to and substantially the length of said wall, a holding coil in said compartment positioned separate from and inwardly of said heating coil and connected at one end to one end of said heating coil, a heat collector coil disposed in an enclosure in said space to be heated connected to said ducting, means for forcing air to be heated over said heat collector coil into said ducting, a heating liquid supply conduit connecting the other end of said holding coil to one end of said heat collector coil, a heating liquid return conduit connecting the other end of said heat collector coil to the other end of said heating coil, thus providing a closed circuit between and including said coils containing a heating liquid, a motor driven pump in said supply line adapted when actuated to force liquid from said holding coil toward said heat conduit, means responsive to a drop in the temperature in said heat collector coil below a predetermined lower value for energizing said burner and actuating the pump to circulate heating fluid through said circuit and for stopping such circulation and inactivating the burner when that temperature raises to a predetermined higher value, said heating and holding coils being subject to direct heating from said burner and there being means at said compartment for forcing hot flue gases from said burner through said holding coil before exhaust.