Attic Fan Basics

Ideally air comes in the bottom and out the top.

Attic fan basics. Intake vents located at the lowest part of the roof under the eaves allow cool. An attic fan can be gable mounted or roof mounted. It s just like a chimney in your home. You have holes in the bottom of your attic usually soffit vents and holes in the top of your attic ridge vent wind turbines static vents or power fans.

Installing an attic fan step 1. Roof mounted attic fans require a vent hold near the top of the roof where the fan can sit over the vent on a plastic or metal base. Most solar attic fans are surface mounted meaning that they are installed directly through the roof surface where they are most efficient. As the attic space warms up from the irradiation of the sun the ventilation port opens wider to allow the solar fan to move more warm stale air out of the attic area.

A fan that won t run is often caused by a failed motor or a bad thermostat. A powered attic ventilator or attic fan is a ventilation fan which regulates the heat level of a building s attic by exhausting hot air. We like master flow s model for its easy installation and efficiency. A thermostat is used to automatically turn the fan off and on while sometimes a manual switch is used.

Attic ventilation serves two main functions. Solar attic fans do just that. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Installing the shutter center the front of the automatic shutter over the vent hole make sure the shutter s.

Designed for attic spaces up to 2 088 square feet master flow s unit can remove a large volume of hot air at a rate of 1 500 cfm. Test the wires to ensure the power is off. An attic fan installed underneath a roof. Lowering the temperature in the attic can help reduce air conditioning energy costs and roof deck temperature optimize the service life of a roof covering and minimize ice damming.

How to test an attic fan motor and thermostat. When working with electricity always. The attic fan has a flashing that fits in with the shingles and is water proof. Installing the shutter if the existing gable vent is smaller than the diameter of the fan you ll need to remove.

It goes on and off automatically with a thermostat so it only runs when it is beneficial. Turn off electricity at the main fuse box or circuit breaker box that controls the power to the fixture or the room you re working on. The attic fan is normally mounted up on the roof of the home toward the back about two feet down from the peak.