Gas water heater

Details Gas water heater Gas water heater

2006-08-16

2009-12-22

Wilson, Gregory A (Department: 3749)

Liquid heaters and vaporizers

Flue

Vertical

C122S013010

Reexamination Certificate

active

07634977

ABSTRACT:
A gas water heater includes a power burner, a flue tube, an exhaust plenum, and a draft hood. The flue tube includes a portion that describes at least a 360° loop. Products of combustion are forced through the flue tube under the influence of the power burner, and enter the exhaust plenum. In the exhaust plenum, the pressure of the products of combustion drops such that the products of combustion flow into the draft hood substantially entirely under the influence of natural convection. In one embodiment, the power burner fires down into the flue tube through a side wall of the water heater, the loop of the flue tube is near the bottom of the water heater, and the plenum is in the top of the water heater.

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