How To Seal An Attic Fan For Winter

And the extra heat is not just a summer concern come winter hot attic air can melt snow on the roof during the day only to refreeze when temperatures drop overnight creating ice dams that lead.

How to seal an attic fan for winter.

1 measure the widest part of the whole house fan working inside the room where the fan is located and not. The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows. Duct board foil stiff fiberglass foil is probably the best material if you can find it use aluminum foil duct tape for the joints. When you turn the fan on high the house will be pressurized like an inflated balloon.

Measure the height and width of the. Set the grate aside. Insulation can help reduce this heat exchange keeping your energy bills lower in winter. The whole house fan is installed inside the attic between the living space and ceiling.

A hard wire runs directly from the. Another way to seal off an attic fan is to use thick plastic and insulation. Weatherstrip the bottom and weight as needed. And just as you can feel the air from a leaky balloon you ll be able to confirm leaks in the attic by feeling the draft with your hand.

Find the lighting electrical box for each room and cover it with a dose of spray foam. Turn off the electricity to attic fan by unplugging or by disconnecting the hard wire from the junction box. Whole house fans work on the principle of removing the hot and humid air out of the house. Remove the grate from the attic fan.

Seal penetrations in the attic to stop free air flow. This is also my preferred approach to the attic stairs that don t seal worth a darn. It helps to cool your home temperatures and the attic by approximately 30 degrees. Checking the seal once a week will ensure continual protection against losing heat through your attic fan.

In addition to the attic ventilation solutions above there are more steps you can take to prevent moisture issues in your attic and help maintain proper attic ventilation throughout the winter. Tape cardboard around the fan to cover large gaps. Stick the spray foam nozzle in the hole with it and give it a quick squirt. Find electrical wires that are penetrating the ceiling.

You are not trying to shove foam down the wall but rather make an air tight cap on top. The hinge allows to lid to be blown open by the fan when operating which means you won t have to crawl in the attic over the blown in insulation to open close the lid seasonally. When using plastic make sure the attic fan is properly sealed on all edges. How to close an attic vent during the winter.