How to size a whole house attic fan.
Attic fan breaker size.
I assume we are talking about an a c airhandler and not a whole house fan or attic vent fan.
Example 20 wide by 50 long attic.
Of roof vent area for every 300 sq.
A whole house fan sucks warm house.
For a single story house this is usually the same as the square footage of the house itself plus any attached garage area.
To determine the size of your attic multiply the width by the length of the attic floor in feet.
20 x 50 1 000 sq.
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.
Test the wires to ensure the power is off.
How to wire a attic fan.
The inexpensive fans can help reduce heating and cooling costs by evacuating superheated or cold.
An attic fan is an electric exhaust fan that mounts in your home s attic.
Before running out to buy an attic fan take some time to check the existing attic ventilation on your house.
While the type and number of vents will vary depending on the specific roof design house location and amount of direct sun a minimum venting system should have 1 sq.
A whole house attic fan is installed in the ceiling between the top floor and the attic as a supplement to air conditioning.
When working with electricity always.