How Roof Ventilation Fan Works

This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner.

How roof ventilation fan works. How an attic fan works. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. These fans are designed to remove excess heat from your attic which in theory is supposed to lessen the load on the air conditioning in your home.

Air flows in through the soffit vents and out through the roof vents. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. Apply a bead of asphalt roof cement on the bottom of the vent. They can help you save a lot of money on your energy bills as you may not have to use air conditioning if the weather isn t too hot.

Vents come in various styles. There are several different types of attic ventilation systems but most of them feature small vents soffit and gable which draw in cool air along with a primary fan that pushes air outside. Intake vents located at the lowest part of the roof under the eaves allow cool. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh.

Slide the vent under the shingles so they cover the top half of the vent flange. The lower half of the flange sits on top of the shingles. Attic fans exhaust hot air from your attic to the outside. If you don t know how your roof vents work or if you re unsure about your attic ventilation in general you should talk to a roof inspector about your current system and any inherent weaknesses that may be at work.

An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Nail the lower corners with roofing nails and tar the heads. Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof.

Ventilation helps maintain a healthy attic space both for your roof and for your family. Attic fans work on the principle of pushing out the attic s hot air and replacing it with cool air from outside. If there are not enough soffit gable or ridge vents a powerful attic exhaust fan can pull the air from your home through the ceiling if it is not perfectly sealed off. We chose rectangular hooded roofing vents and rectangular soffit vents because they re easy to install.