Remove the screws surrounding the grille on the fan using a phillips screwdriver.
How to build a box for attic fan vent.
Gable roofs and fans.
Decide where you want the gable vent fan to go and mark out the area using a pencil or piece of chalk.
You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications.
Slit 3 inches in on.
Turn the wheel on the table saw that adjusts the angle on the blade until you get a 45 degree angle.
Examples include ridge vents box and dome vents soffit vents and gable vents.
Cut off the end of the power cord using the blade of a utility knife.
Take your saw and make the hole where the fan will go.
Step 1 prepare the attic.
How to use a box fan in the attic.
Place the box fan face down on a work surface.
This way you don t have to cut a brand new hole but simply make the hole for the vent larger so it can accommodate the fan.
Turn the fan over.
Set the table saw fence on 5 inches.
Make sure it is only just large enough to fit the vent.
If you attic is just a crawl space however your options are limited to vents and fans.
Make sure that the electricity to the attic is turned off.
To save time use an existing roof or gable vent to install your new attic fan.