Furnace Intake And Exhaust Separation

Irc 2006 section m1602 2.

Furnace intake and exhaust separation.

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. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber. 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. Also known as the induced draft fan this one has a fan that is located on the end of the pipe.

My carrier furnace has two pvc pipes that go through the basement wall and up the side of the house. The furnace in the furnace room is accessible for service. 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. Intakes must be protected against rain and pest entry with durable rust and rodent proof materials.

However these combustion gases contain residual heat that is lost through the ventilation. Never pitch the exhaust pipe down ward toward the outdoors. This is another affordable option for the heating solution. You can capture that heat with a high efficiency condensing furnace.

Furnace intake and exhaust pvc. 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. High efficiency condensing furnaces should not be vented into a chimney.

Intakes should not be located directly above any wall exhaust or vent. This is roughly the equivalent of running a bathroom exhaust fan into your furnace s combustion chamber. Since the exhaust pipe is running on a sidewall the fan works together with the furnace. Exhaust outlet ml193df combustion air intake inside of house exhaust combustion outlet air intake outside of house ml193df shipping and packing list package 1 of 1 contains 1 assembled ml193df unit 1 bag assembly containing the following.

It will draw in air for the combustion and then expel the fume outside.