F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
126/21, 110/69
F23L 17/00 (2006.01) F24C 15/00 (2006.01)
Patent
CA 1299041
ABSTRACT OF THE DISCLOSURE POWER VENT A power vent for a furnace or the like comprises an air inlet tube having axially opposed ends; one end has an air intake opening which will normally locate outdoors; the opposed end connects to the inlet of a blower, with the outlet of the blower connecting to a vent tube. The flue of the furnace connects to the air inlet tube intermediate the ends thereof. The vent tube may suitably locate coaxially within the inlet tube. The system will normally be sized such that the ratio of fresh air to flue gas Is from about 5:1 to about 50:1, and residence times between the flue entry to the air inlet tube and the blower outlet are low, of the order of 0.01 second, thereby reducing the incidence of condensation and icing in the power vent. The system may be balanced, for example by varying the area of the air intake opening, whereby negative pressures within the furnace are avoided, thereby increasing the efficiency of furnace operation.
613068
Ridout & Maybee Llp
Vebteck Research Inc.
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