Furnace Intake And Exhaust Separation

This is roughly the equivalent of running a bathroom exhaust fan into your furnace s combustion chamber.

Furnace intake and exhaust separation.

Never pitch the exhaust pipe down ward toward the outdoors. Supplying makeup air can help natural draft appliances by compensating the effect of the powered exhaust appliances and equipment in the house including fireplaces exhaust fans ventilation systems clothes dryers and similar appliances and equipment. The exhaust pipe has two 90 degree fittings at the top of the pipe which gives a 180 degree turn and the exhaust opening is pointed straight down. You can capture that heat with a high efficiency condensing furnace.

Since the exhaust pipe is running on a sidewall the fan works together with the furnace. Also known as the induced draft fan this one has a fan that is located on the end of the pipe. The furnace in the furnace room is accessible for service. It will draw in air for the combustion and then expel the fume outside.

My carrier furnace has two pvc pipes that go through the basement wall and up the side of the house. Intakes must be protected against rain and pest entry with durable rust and rodent proof materials. Wall intakes must also be 10 feet from any exhaust fan discharge outlet unless that outlet is 3 feet or more above the intake location. This is another affordable option for the heating solution.

A gas furnaceneeds approximately thirty feet of air for every foot of gas used. At the top of the pvc pipe the intake has one 90 degree fitting so the opening is pointed straight out to the side of the vertical pipe. Intakes should not be located directly above any wall exhaust or vent. Provide at least a 1 4 inch per foot upward pitch for horizontal exhaust vent piping to allow the condensate to drain back down into the furnace.

High efficiency condensing furnaces should not be vented into a chimney. However these combustion gases contain residual heat that is lost through the ventilation. Irc 2006 section m1602 2. The easy answer is oxygen is a key element in combustion therefore your furnace needs air.

3 wire nuts 1 snap bushing 1 snap plug 1 wire tie 1 condensate trap 1 condensate.