How To Install Roof Ventilation Fan

It can be controlled by a thermostat or moisture monitor.

How to install roof ventilation fan. Blades spin within the unit to expel air from the attic until the right temperature or moisture level is reached at which point it will automatically shut off. A powered exhaust vent is much like a roof mounted exhaust fan. To install an attic fan over a gable vent in your attic trace the body of the fan onto a piece of plywood that s wide enough to mount on the studs on each side of the vent. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an.

Whole house fans tend to have higher overall costs than attic ventilation fans. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them. Pricing for attic fan installation varies depending on fan type and its location. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Photos 1 6 show how it s done. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. 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.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Adding attic vents is a simple matter of cutting holes and installing vents. Then cut out the circle with a reciprocating saw and mount the fan over the cutout using a drill.

But before you cut any holes plan the locations of the attic vents. Attic ventilation fans also tend to be quite energy efficient in terms of their own operation. To save time use an existing roof or gable vent to install your new attic fan. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

On average labor costs run between 100 300 and the fan itself may range from as little as 50 to more than 500.