Gas-fired heater with carbon dioxide detector

A portable gas-fired infrared heater comprising:

• a housing, said housing comprising
• a handle adapted for transporting the heater, and
• an air inlet;
• a regulator;
• a burner assembly mounted within the housing, said burner assembly comprising
• a fuel valve adapted to control communication with a fuel source,
• a venturi for mixing air from the air inlet and fuel from the fuel valve into a fuel-air mixture;
• a radiant surface, said radiant surface
• recessed into the housing,
• disposed at an angle to vertical, and
• comprising a rear face;
• a plenum chamber adjacent to said radiant surface, said plenum chamber
• in communication with said radiant surface, and
• adapted to distribute said fuel-air mixture onto the rear face of the radiant surface;
• and
• a carbon dioxide detector system,
• said carbon dioxide detector system adapted to shut off the fuel valve in response to detection of a predetermined level of carbon dioxide.

A portable gas-fired radiant heater comprising:

• a housing;
• a fuel source;
• a fuel connection fitting;
• an air inlet;
• a burner assembly mounted within the housing, said burner assembly comprising
• a fuel valve adapted to control communication with said fuel source
• a radiant surface in the housing, said radiant surface adapted to function as a combustion site;
• and
• an automatic shutoff mechanism operatively associated with the burner assembly for shutting off the fuel valve in response to a detection of a predetermined level of carbon dioxide.