Gas-fired heaters with burners which operate without secondary a

Details Gas-fired heaters with burners which operate without secondary a Gas-fired heaters with burners which operate without secondary a

1997-09-18

1999-03-02

Dority, C.

Liquid heaters and vaporizers

Stand boiler

And condition responsive feature

122 17, 126361, 431329, F22B 500

Patent

active

058757392

ABSTRACT:
A gas-fired burner apparatus includes a porous combustion surface disposed in a combustion chamber substantially sealed to prevent entry of secondary air. A subatmospheric pressure is maintained in the combustion chamber by a natural or aspirated draft. The subatmospheric pressure cooperates with an aspirating flow of fuel to the burner apparatus to provide an increased flow of primary combustion air which reduces the combustion temperature and the emission of pollutants. Alternatively, the subatmospheric pressure may be used to achieve a given flow of primary combustion air with a reduced combustion surface area. Water heater and room heater applications of the burner apparatus are illustrated.

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