Auxiliary exhaust system

Details Auxiliary exhaust system Auxiliary exhaust system

1983-01-21

1984-12-11

Favors, Edward G.

Furnaces

Draft regulators

Stack

110162, 110163, 126 80, 126293, 126312, 169 54, 236 45, 236 96, 431 20, F23L 1716, F23N 300

Patent

active

044871376

ABSTRACT:
An auxiliary exhaust system for use with a flue includes a conduit communicating at one end with an opening formed in the flue wall and a blower operable to introduce auxiliary air into the flue through the conduit. The conduit is angled so that the auxiliary air enters the flue with a velocity component extending in the downstream direction of the flow of the products of combustion to aid in venting the combustion unit. A damper located within the conduit operates an on-off switch in a blower control circuit which starts and stops the blower when the damper is opened and closed, respectively. The blower control circuit also includes an automatic combustion control which is responsive to flue temperature to increase the speed of the blower whenever the flue temperature is below a predetermined value and to decrease the blower speed whenever the flue temperature is above a predetermined value. The blower includes an access port which enables a fire extinguishing chemical to be introduced into the flue.

REFERENCES:
patent: 2014187 (1935-09-01), Neff
patent: 2497944 (1950-02-01), Jendresen
patent: 4335704 (1982-06-01), Wingstrom et al.
patent: 4341267 (1982-07-01), Lagasse
patent: 4341344 (1982-07-01), Russell

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