Patent ID: 7766006

Claim:
A dual fuel vent free gas heater comprising: two regulators arranged in parallel flow paths and in flow communication with a fuel line extending to a thermostatic control valve; the thermostatic control valve having an injector fuel outlet line feeding a multi-positional manual fuel control valve, said multi-positional manual control valve comprising a control block with a single control cylinder that is rotatable between a first angular position to feed a first injector fuel supply line or second angular position to feed a second injector fuel supply line; a gas burner having a plurality of gas outlet ports, said plurality of gas outlet ports being in flow communication with at least a first pilot flame burner; a first and a second fuel injector, said first fuel injector being in flow communication with the first injector fuel supply line and said second fuel injector being in flow communication with the second injector fuel supply line, said first and second fuel injectors being in flow communication with an interior of said gas burner via a gas burner inlet, said first and said second fuel injectors each having an injection angle with respect to the gas burner inlet other than 0°; and said first injector fuel supply lines and said first injectors each having a composition and configuration for transporting a first type of fuel at desired flow rates, said second injector fuel supply line and said second injector each having a composition and configuration for transporting a second type of fuel at desired flow rates, said first type of fuel being different from said second type of fuel.