Abstract: A modular support system for outdoor radiant tube heaters includes a frame defined by hollow beams for receiving fuel and electrical lines and supporting electrical heaters posts for supporting the beams and saddles for interconnecting the beams and mounting them on posts.

Abstract: A modular support system for outdoor radiant tube heaters includes a frame defined by hollow beams for receiving fuel and electrical lines and supporting electrical heaters posts for supporting the beams and saddles for interconnecting the beams and mounting them on posts.

Abstract: A radiant tube heater includes a housing and a burner tube extending outwardly therefrom for carrying products of combustion from the housing. When less heat is required, unless air from the blower is reduced, there is too much air for complete combustion of the fuel and excess air mixes with combustion gases causing cooling in the burner tube. This problem is solved by providing a short flame tube in the inlet end of the burner tube for receiving the flame. Excess air flow around the flame tube is heated. Thus, it is necessary to reduce only the supply of fuel to the burner.

Abstract: A radiant tube heater assembly includes a housing containing a blower and a burner, which is aligned with an opening in the housing through which a flame and products of combustion flow into a U-shaped burner tube. The closed downstream end of the burner tube is in close proximity to the housing. In order to prevent or reduce the likelihood of the products of combustion entering the blower, an exhaust tube is mounted in a downstream leg of the burner tube and extends outwardly through the U-shaped outer end of the tube remote from the housing.

Abstract: A radiant tube heater assembly includes a housing containing a blower and a burner, which is aligned with an opening in the housing through which a flame and products of combustion flow into a U-shaped burner tube. The closed downstream end of the burner tube is in close proximity to the housing. In order to prevent or reduce the likelihood of the products of combustion entering the blower, an exhaust tube is mounted in a downstream leg of the burner tube and extends outwardly through the U-shaped outer end of the tube remote from the housing.

Abstract: A radiant tube heater includes a housing and a burner tube extending outwardly therefrom for carrying products of combustion from the housing. When less heat is required, unless air from the blower is reduced, there is too much air for complete combustion of the fuel and excess air mixes with combustion gases causing cooling in the burner tube. This problem is solved by providing a short flame tube in the inlet end of the burner tube for receiving the flame. Excess air flow around the flame tube is heated. Thus, it is necessary to reduce only the supply of fuel to the burner.

Abstract: A variable input, radiant tube heater includes the usual housing containing a burner tube, a reflector connected to the housing, a fuel line into the housing and a pressure regulator in the fuel line. The blower is operated by a 24 volt motor and a transformer remote from the heater. Fuel flow is regulated by a regulator including a valve in the fuel line, a valve operator and an electrical control connected to the operator. For outdoor use heaters are supported by a modular frame including hollow beams, posts for supporting the beams and saddles for interconnecting the beams and mounting them on posts.