Attic Exhaust Fan Purpose

The problem with this design as argued by energy professionals is that attic fans also pull the conditioned air from your home into the attic.

Attic exhaust fan purpose.

They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling costs. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. 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. 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.

Attic fans exhaust hot air from your attic to the outside. 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 quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling costs. It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air with outdoor air.

Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature. A thermostat is used to automatically turn the fan off and on while sometimes a manual switch is used. As the attic fan draws outdoor air into the attic it vents hot stale air out through attached dormers. A powered attic ventilator has a different purpose.

An attic fan can be gable mounted or roof mounted. However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic. Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside.

Ideally this will lower the high temperatures that have built up in your attic. This is done by re routing or installing duct pipe from the fan and then routing it to an exterior vent onto the roof giving an exit for moisture. This air is then exhausted through the fan to the outside. Intake vents located at the lowest part of the roof under the eaves allow cool.

The egv6 power gable mount vent can move air at a rate of up to 1600 cu. The egv5 power gable mount vent can move air at a rate of up to 1450 cu.