Infrared space heater

In a space heater, the combination of, a vertical axis chimney constructed of material which transmits radiant heat, a bottom structure closing the bottom of said chimney, a top structure substantially closing the top of said chimney and having an exhaust port, means securing said bottom and top structures against the respective extremeties of said chimney to thereby form a closed chamber with said exhaust port for the flue gases at the top, an infrared gas burner centrally positioned within said chamber and presenting a radiating surface from which heat is radiated through said chimney with the products of combustion being discharged from said burner into said chamber and thence through said exhaust port, means to provide fresh air to said burner along a flow path which subjects the fresh air to the heating action of the flue gases, means forming a plenum chamber through which the heated fresh air passes to said burner, and means to supply fuel gas to said burner along a heat-exchange path with the fresh air passing to said burner to cause the temperature of the fuel gas to approach that of the fresh air when flowing to said burner.

In a space heater, the combination of, a vertical axis chimney having a heat-radiating wall constructed of material which transmits radiant heat, a bottom structure closing the bottom of said chimney, top structure substantially closing the top of said chimney and having an exhaust port for the flue gases at the top, said top and bottom structures closing the extremeties of said chimney and forming a closed chamber, means rigidly mounting said chimney and said top and bottom structures to form a compact unit, an infrared gas burner positioned within said chamber and presenting a heat-radiating surface from which heat is radiated through said heat-transmitting wall of said chimney with the products of combustion being discharged from said burner into said chamber and thence through an exhaust port, means to provide fresh air to said burner, means forming a plenum chamber through which the heated fresh air passes to said burner, and means to supply fuel gas to said burner along a heat-exchange path with the fresh air passing to said burner to cause the temperature of the fuel gas to approach that of fresh air when flowing to said burner.

A space heater comprising, a substantially cylindrical, vertical axis gas burner structure of the type through which a combustible mixture of fuel gas and air is discharged while being ignited so as to produce intense heat radiation throughout a heat-radiating zone which is exposed radially outwardly with respect to said axis, means forming a substantially cylindrical, closed chamber surrounding said burner and having a substantially common axis with said burner and including a vertical wall portion which extends upwardly coextensive with and substantially parallel to said heat-radiating zone, said wall structure being of radiant heat transmitting material whereby radiant heat passes radially outwardly through said wall structure in a uniform manner from said heat-radiating zone and out of said chamber, means to supply a mixture of fuel gas and air in proportions to provide substantially complete combustion without excess oxygen, said means forming said chamber including a base through which said mixture of fuel gas and air is delivered to said inlet port of said burner and a top construction providing an exhaust port for flue gases whereby said chamber provides a flue in which the products of combustion pass upwardly and discharge heat by conduction.