How Roof Ventilation Fan Works

Air flows in through the soffit vents and out through the roof vents.

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. 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. Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof. As hot air rises to the top fans push the hot air out and cool down the home by drawing in the fresh air.

For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Apply a bead of asphalt roof cement on the bottom of the vent. 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. The lower half of the flange sits on top of the shingles.

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. 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. Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burners and into the home.

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. Slide the vent under the shingles so they cover the top half of the vent flange. Vents come in various styles. We chose rectangular hooded roofing vents and rectangular soffit vents because they re easy to install.

Intake vents located at the lowest part of the roof under the eaves allow cool. Attic fans are installed at the roof level of your home to regulate the heat level. An attic fan is installed on the slanted side of your roof or on one of the gable sides of your attic. Nail the lower corners with roofing nails and tar the heads.

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. How an attic fan works. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh.