The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5.
Blow hot air into attic form closet.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
Insulated attic fan door newer attic fans have insulated doors that close in 30 seconds when the fan s not operating.
Of clearance from class b flues 2 in.
In the winter months you will be injecting hot air into the room compounding the problem.
The condenser in your air conditioner works hard to get rid of heat and pressurize refrigerant for the return trip through your house.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
But it gets worse.
Put it in an attic full of blown insulation and you re.
What we need to do is exhaust the warm air from the room not inject air.
From masonry chimneys to any combustible material including insulation.
Kadin2048 i writes i don t think that condensation in the attic is really a problem in my area the attic is so hot it s almost certainly warmer near the peak than the exhaust air from the ac but in some areas or if you were using the ac to cool a particularly hot room like a server closet on a cool day it very well might be a problem.
Because the pipe gets hot building codes require 1 in.