A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing...http://www.google.com.au/patents/US7766006?utm_source=gb-gplus-sharePatent US7766006 - Dual fuel vent free gas heater
