How To Install An Attic Gable Fan

If your attic uses soffit vents at the bottom and gable vents at the top for ventilation having a gable vent fan drawing air into the attic would not be the best solution since it would tend to create positive pressure in the attic which could reverse the natural air flow that occurs when heat rises up through the soffit vents and out through the gable vents.

How to install an attic gable fan.

Those made for roof installations and those intended to be mounted in a gable wall. To save time use an existing roof or gable vent to install your new attic fan. This way you don t have to cut a brand new hole but simply make the hole for the vent larger so it can accommodate the fan. Roof fans are mounted on plastic or sheetmetal bases that serve as flashing.

Gable fans fit into the gable vent and can be set to operate only within. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. There are two basic attic fan designs. Installing an attic fan over a gable vent 1.

Drill a hole into the perimeter of the circle just drawn on the plywood using a saber saw and cut out the circle. You will also save on air conditioning bills. Mount fan image zoom mount a gable fan by driving screws through the mounting flanges into framing members. Even if your roof already has ridge vents and plenty of ventilation built in it s a good idea to install gable fans or roof fans to help blow hot humid air out of the attic.

What you need step 1. Measure the distance between the studs on the left and right side of your vent. Find a piece of plywood that s at least as wide as the distance between the studs. Attach to power image zoom shut off power to the circuit and run code approved cable to a nearby junction box.

Center the gable attic fan over the hole and attach the mounting brackets with screws. Setting the fan on the plywood will ensure that the fan blades will not be obstructed by walls. You re going to be mounting the. Use a tape measure to get an accurate.