How To 6a Roof Around A Box Fan

Leave the drill bit sticking through the roof so you can find the hole.

How to 6a roof around a box fan. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. The motors and bearings on box fans have a tendency to go bad. Lay the fan down on a flat surface with the exposed face up. Some means for collection such as an exhaust fan grease box must be provided.

Box fans work by having a set of fan blades attached on the shaft of a small motor. Box fans placed in or near windows can help draw in cool air from outside or pull warm air out of a room depending on how they are placed. If the blades face the window screen the fan helps pull. Tape strips of plastic tarp using duct tape to the sides top and bottom of the fan to cover the seam between it and the attic wall.

Trace the outline of the box with a pencil to mark the hole. With the 2x4 and box assembled hold them between the joists so the outlet box presses against the back of the ceiling. Seal the exhaust duct to the fan box with approved metal tape or mastic. Grasp the blades firmly and lift slowly to remove them.

If there is a c clip pry it off first. Seal holes in the fan housing with caulk sealing putty or metal tape. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Get the trade secrets from the jet fan man who has installed around 13 000 attic fans since 1983.

Let the caulk set for the amount of time specified in the instructions that accompany it. Here is how to fix a box fan. Using a saw cleanly cut all a hole in the ceiling drywall no more than 1 inch larger in diameter than the fan box. Start in the attic and drill a hole through the roof in the desired vent location.

A grease pipe is usually positioned towards the roof slope to provide single point drainage of water and residue. Apply the caulk again. Seal around the exterior fan duct vent with caulk or a pre made exterior wall gasket. Apply caulk from a caulking gun around the fan where it meets the wall.

Box fans work by having a set of fan blades attached on the shaft of a small motor. Try to keep it close to the fan location. Cut a 2x4 to this length and attach a new fan rated outlet box to the midpoint using deck screws. The motors and bearings on box fans have a tendency to go bad.

How to fix a box fan. Install the fan then seal around the fan with caulk or canned spray foam. It can be placed directly under the exhaust fan trough or an adapter and pipe can be used to carry the water and.