| 摘要 |
A radiant heater system of the type having an radiant energy emitter conduit extending at least partly through the area to be heated. The radiant heater system furthe r including a burner for burning fuel thereby forming combustion products, said burner connected to an inlet end of the emitter and further including an air intake sleeve for controlling the amount of combustion air available to said burner, and a blower sized to provide dilution air communicating with said burner wherein the dilution air cools the combustion products proximate said inlet end thereby reduces the emitter temperature proximate said inlet end. The heater further adapted to vary the emissivity of said emitter along at least a portion of the length of the emitter in order to control the amount of radiant heat emitted by the emitter as a function of the distance along the emitter.
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