Big Attic Fan

Or the walls could be getting heated up by the sun during.

Big attic fan.

Attic x 0 7 700 cfm minimum fan rating. 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. Whole house fans should provide houses with 3 to 6 air changes per hour varies with climate floor plan etc check with a professional to determine what is appropriate for your. This provides much needed ventilation and is a powerful addition to your hvac system.

It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air. The big complaint that leads to an attic fan request is usually a hot second floor which can largely be mitigated by air sealing the attic and installing a generous bit of insulation drastically reducing conduction and convection. It works by drawing hot humid air out of your attic and pushing it outside. A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.

A smart attic fan features a built in thermostat and or humidistat that directly controls the motor speed based on the conditions in the attic. A powered attic ventilator has a different purpose. All of a sudden that attic fan isn t needed anyway. Add an additional 20 cfm x 1 20 if you have a steep roof and 15 cfm x 1 15 for a dark roof.

This american designed fan is designed to reduce attic temperatures and remove destructive moisture thus making your home more comfortable and reducing the load on your hvac system and lowering your. An attic fan is what it sounds like it s a fan installed on the ceiling of your attic. The downside of attic ventilation fans. However the utility of attic ventilation fans is actually quite a controversial topic.

The smart attic fan is the first of its kind and is truly revolutionary for attic cooling and ventilation. If you re talking about a whole house fan that s a difficult question. The whole house fan pulls air in from open windows and exhausts it through the attic and roof. 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.

How big of an attic fan do i need. The department of energy recommends a fan powerful enough to change the air 30 to 60 times per hour but goes on to say it depends on climate floor plan and other factors. It provides good attic ventilation in addition to whole house cooling. Attic vent fans are commonly rated from 800 to 1 600 cfm making one fans suitable for attics of up to around 2 200 square feet.

Good insulation reduces fan effectiveness.