Method and apparatus for reducing nitrogen dioxide (NO2)...

Details Method and apparatus for reducing nitrogen dioxide (NO2)... Method and apparatus for reducing nitrogen dioxide (NO2)...

2005-10-11

2005-10-11

Gravini, Stephen (Department: 3749)

Combustion

Timer, programmer, retarder or condition responsive control

With test circuit checking or analyzing flame sensing...

C431S078000

Reexamination Certificate

active

06953335

ABSTRACT:
An apparatus for reducing nitrogen dioxide emissions in a flueless heating appliance or heater includes a heat-exchanger for exchanging heat contained in fumes produced by the combustion of a fuel in the heating appliance. A heating appliance or heater without a fume flue includes a burner supplied with a gaseous fuel, an evacuator for discharging into an environment outside the heater fumes produced by combustion of the fuel, and a heat-exchanger for receiving the fumes from the burner and sending them to the evacuator. A method for reducing nitrogen dioxide emissions in a flueless heating appliance, supplied with a gaseous fuel, includes removing heat in a controlled manner from fumes produced by the combustion of the fuel so as to minimize the conversion of NO into NO2 in the fumes.

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