How Roof Ventilation Fan Works

Intake vents located at the lowest part of the roof under the eaves allow cool.

How roof ventilation fan works.

As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burners and into the home. Attic fans exhaust hot air from your attic to the outside. Air flows in through the soffit vents and out through the roof vents.

Attic fans are installed at the roof level of your home to regulate the heat level. 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 fans work on the principle of pushing out the attic s hot air and replacing it with cool air from outside. Nail the lower corners with roofing nails and tar the heads.

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. 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. Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof.

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. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Slide the vent under the shingles so they cover the top half of the vent flange. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

How an attic fan works. 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. 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. Ventilation helps maintain a healthy attic space both for your roof and for your family.

Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. 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. The lower half of the flange sits on top of the shingles.