Attic Exhaust Fan Purpose

The downside of attic ventilation fans.

Attic exhaust fan purpose.

It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air. Good insulation reduces fan effectiveness. Attic fans exhaust hot air from your attic to the outside. However the utility of attic ventilation fans is actually quite a controversial topic.

Ventilation fans or powered attic ventilators are designed to cool the attic pushing out the hot attic air and rushing in a flow of cool outside air. They are typically easier to install and won t detract from the appearance of your roof. 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 fan may be installed in an attic for the different purpose of cooling a whole house venting hot air out via the attic.

Powered attic ventilators are housed in the. Such fans are often called whole house fans. Mechanical attic ventilation fans may be powered in a variety of. Attic fans are typically used in warmer months when temperatures in an attic can exceed 120 f 49 c.

How an attic fan works. A powered attic ventilator has a different 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. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.