Bathroom Soffit Vent Installation

View instructions on how to install PreVent-It soffit vents.

4" Soffit Vent for Bathroom Exhaust Fan

White 4 inch soffit vent for bathroom fan

How to Install the PreVent-It 4" Bathroom Soffit Vent

Step 1

Measure a 4.5 inch diameter minimum cut where you will install the soffit vent.

Step 2

Pull transition flex duct through opening and attach to top of soffit vent using a zip tie (not provided). For hard duct installation, pull transition duct through opening, attach duct and soffit vent, seal connection with tape or caulk (not provided).

Step 3

Push attached duct and soffit vent into hole. Attach to soffit using four (4) provided screws. Note: You will see 6 screw holes; you do not need to put screws in the 2 holes nearest the screen.

IMPORTANT: Our soffit vent is designed for use with bathroom exhaust fans only. Installing a sister joint or cross brace is recommended to prevent the soffit from sagging. Vent exit should be installed at the outermost edge of the soffit for best performance.