How To Seal Attic Fan For Winter

Turn off the electricity to attic fan by unplugging or by disconnecting the hard wire from the junction box.

How to seal attic fan for winter.

How to close an attic vent during the winter. This allows plenty of blown in insulation cellulose fiberglass rockwool etc to be installed in the attic without falling into the whole house fan. Set the grate aside. When you re done sealing your attic bypasses push the insulation back into place with an old broom handle or stick as you back out of the attic.

If you are creative you can also use spray foam to glue your boxes together. If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the opening. Measure the height and width of the. 1 measure the widest part of the whole house fan working inside the room where the fan is located and not.

Remove the grate from the attic fan. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. Checking the seal once a week will ensure continual protection against losing heat through your attic fan. In my opinion the best solution would be to build a box out of rigid insulation board that has a hinged lid.

Insulation can help reduce this heat exchange keeping your energy bills lower in winter. Off the shelf products are available but would have cost me more however it would have significantly reduced my time in the attic. Notch a hole for your wire and spray foam around the bottom and any gaps in the box.