You simply add up the nfas of all your vents and divide that number by the area of the attic to determine whether you re within the 1 150 ratio.
How do you know if your attic fan is on.
If you want your home air conditioner to cool you.
Step 1 test the fan motor.
The attic fans just pull air through a hot attic space in an effort to reduce the infrared heat gain you feel through the ceiling of your home.
You place the fans on the gable walls of your attic.
Step 2 test the thermostat.
Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet.
If the fan turns on the motor is still good.