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.

How to install roof ventilation fan.

Then cut out the circle with a reciprocating saw and mount the fan over the cutout using a drill. It can be controlled by a thermostat or moisture monitor. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. 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. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. 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.

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an. Attic ventilation fans also tend to be quite energy efficient in terms of their own operation. A powered exhaust vent is much like a roof mounted exhaust fan. When the fan is securely mounted carry it over to the vent and nail.

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. Photos 1 6 show how it s done. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. See below for a shopping list and tools subscribe.

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. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Pricing for attic fan installation varies depending on fan type and its location. To save time use an existing roof or gable vent to install your new attic fan.

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