The tube-fired radiant heating system is of the type where an elongated tube is heated by hot gases of combustion which are passed. The heated tube radiates heat to the space to be heated therethrough.
A burner is provided at one end of the tube to burn an air/fuel mixture. The products of combustion are forced through the tube by means of a blower provided at the tube inlet. Burning takes place within the tube. A tubular stream of air is constantly passed over the flame to protect the tube from the high heat of combustion.