How To Install Roof Ventilation Fan

It can be controlled by a thermostat or moisture monitor.

How to install roof ventilation fan.

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. 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. Photos 1 6 show how it s done. Whole house fans tend to have higher overall costs than attic ventilation fans. But before you cut any holes plan the locations of the attic vents.

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. When the fan is securely mounted carry it over to the vent and nail. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.

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. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Then cut out the circle with a reciprocating saw and mount the fan over the cutout using a drill. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

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. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. On average labor costs run between 100 300 and the fan itself may range from as little as 50 to more than 500.

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.