Patent ID: 7980850

Claim:
A radiant panel heater comprising: a housing having a back wall, an opposed heat radiating front wall and at least one side wall connecting said back wall with said heat radiating front wall and having a combustion oxidant inlet and an exhaust gas outlet; a combustion chamber wall disposed within said housing at a distance from said heat radiating front wall, forming a combustion space between said combustion chamber wall and said heat radiating front wall and forming an oxidant plenum between said combustion chamber wall and said back wall the oxidant plenum in fluid communication with said combustion oxidant inlet; an exhaust gas plenum wall disposed entirely within said oxidant plenum, forming an exhaust gas plenum between said exhaust gas plenum wall and said combustion chamber wall and forming an exhaust gas plenum outlet, and an exhaust gas conduit providing fluid communication between said exhaust gas plenum outlet and said exhaust gas outlet; an oxidant permeable distributor wall disposed within said oxidant plenum between said exhaust gas plenum wall and said back wall, forming an oxidant preheat plenum between said oxidant permeable distribution wall and said exhaust gas plenum wall; a nozzle mix burner nozzle extending through a nozzle opening formed by each of said back wall, said oxidant permeable distributor wall and said exhaust gas plenum wall for receiving said burner nozzle and having a fuel inlet, a primary oxidant inlet, a swirler disposed in the primary oxidant inlet and a fuel/oxidant mixture outlet in fluid communication with said combustion space; a primary combustion oxidant conduit providing fluid communication between said oxidant preheat plenum and said primary oxidant inlet; exhaust gas fluid communication means for providing fluid communication between said exhaust gas plenum and said combustion space; and secondary oxidant fluid communication means for providing secondary oxidant from said oxidant preheat plenum to said exhaust gas plenum for mixing with exhaust gases in said exhaust gas plenum for completing combustion.