How To Wire A Roof Vent Fan

Adding a vent fan roof adaptor.

How to wire a roof vent fan. Leave the drill bit sticking through the roof so you can find the hole. Insert the end of the 12 2 wire into the fans junction box. This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent. The ground wire will need to be ran to a bare metal surface and the power wire will need to be ran directly to the battery it does not go to a thermostat as the controls for the unit are on the bottom.

There are only two wires on the fan tastic vent roof vent w 12v fan part fv801208 a white wire which is the ground and then a black wire which is the power. Before you start step 6 and step 7 make sure to turn off power at your circuit breaker box before you begin any wiring. The adaptor has recesses and a slight curve to hug the shape of your van. These specialty vents do not affect the.

Use wire nuts to connect. Once the fan is centered nail the plywood into the studs to secure the fan over the vent. 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.

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. Strip away about 6 inches of outer insulation and 1 2 inch of individual insulation from the end of each wire. As a bonus it can also help guide the layout process. Center the fan over the vent before you nail the plywood to the studs.

Wrap the joints with duct tape. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. 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. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications.

Try to keep it close to the fan location. A roof adaptor is a square of plastic designed to level off the vent fan surface. 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.