How To Run Bath Exhaust Vent Through Attic To Wall

This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.

How to run bath exhaust vent through attic to wall. From outside use 4 inch hole saw to cut hole for wall cap. Routing vertically out of the roof or routing through the upper part of the wall to the exterior are time consuming invasive projects. Here is the link to th. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Look for the special fans starting at 160 at heating cooling equipment. Learn about bathroom exhaust fan venting code basic requirements. The end of the vent run should also have a grille or screen to prevent vermin from entering your home. The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof.

You mount a switch in each bathroom. A 3 or 4 inch duct connects to the outlet on the fan housing and runs to a side wall or to the roof and connects to a vent cap that allows the. A single exhaust exits through the roof figure a. This system is quiet too.

The bathroom exhaust ventilation fan disperses air through an opening in the fan housing which is usually 3 inches in diameter and ideally faces in the direction of the ventilation system outlet. This involves running ductwork from the fan usually though an attic and out through the roof. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly.

Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. The master bathroom and the 2nd bathroom vent through the roof and through the same opening. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover.

In this video this old house general contractor tom silva explains how to vent a bathroom fan. Drive nail through house wall from attic. Because the fan is in the attic you ll hardly hear it. The 2nd bathroom vent drips on the floor and is ruining the ceiling.

Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.