How To Seal An Attic Fan For Winter

Stick the spray foam nozzle in the hole with it and give it a quick squirt.

How to seal an attic fan for winter.

Weatherstrip the bottom and weight as needed. Measure the height and width of the. Remove the grate from the attic fan. Seal penetrations in the attic to stop free air flow.

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. A hard wire runs directly from the. Another way to seal off an attic fan is to use thick plastic and insulation. This is also my preferred approach to the attic stairs that don t seal worth a darn.

Turn off the electricity to attic fan by unplugging or by disconnecting the hard wire from the junction box. When you turn the fan on high the house will be pressurized like an inflated balloon. Set the grate aside. Seal nail penetrations and around electrical hvac and chimney penetrations.

Checking the seal once a week will ensure continual protection against losing heat through your attic fan. Insulation can help reduce this heat exchange keeping your energy bills lower in winter. How to close an attic vent during the winter. Find the lighting electrical box for each room and cover it with a dose of spray foam.

Find electrical wires that are penetrating the ceiling. When using plastic make sure the attic fan is properly sealed on all edges. Tape cardboard around the fan to cover large gaps. 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.

The whole house fan is installed inside the attic between the living space and ceiling. Build a box that goes over the whole fan on the attic side in the winter time. Whole house fans work on the principle of removing the hot and humid air out of the house. 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.

Duct board foil stiff fiberglass foil is probably the best material if you can find it use aluminum foil duct tape for the joints. 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. The velcro seal on the ceiling would be a good supplement to this solution. You are not trying to shove foam down the wall but rather make an air tight cap on top.