How To Wire A Roof Vent Fan

Rafter vents or insulation baffles install in any rafter space to create narrow gaps that direct fresh air from the soffit vents to the peak of the roof.

How to wire a roof vent fan.

When you position the plywood and fan over the vent the back of the fan should be facing you and the front of the fan should be facing toward the vent. To save time use an existing roof or gable vent to install your new attic fan. See below for a shopping list and tools subscribe. These specialty vents do not affect the.

As a bonus it can also help guide the layout process. Try to keep it close to the fan location. Strip away about 6 inches of outer insulation and 1 2 inch of individual insulation from the end of each wire. A roof adaptor is a square of plastic designed to level off the vent fan surface.

Start in the attic and drill a hole through the roof in the desired vent location. To install a roof adaptor cut and clean the hole in the roof as you would normally. Use wire nuts to connect. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications.

The adaptor has recesses and a slight curve to hug the shape of your van. 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. Leave the drill bit sticking through the roof so you can find the hole. Center the fan over the vent before you nail the plywood to the studs.

Wrap the joints with duct tape. Once the fan is centered nail the plywood into the studs to secure the fan over the vent. Connect and wire the fan slide clamps over the flexible duct at both the roof cap and the fan housing then slip the clamps over the tailpieces of the roof vent and fan and tighten the clamps. Adding a vent fan roof adaptor.

Insert the end of the 12 2 wire into the fans junction box. Before you start step 6 and step 7 make sure to turn off power at your circuit breaker box before you begin any wiring. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.