Bathroom Exhaust Fan Duct Attic

How to install a bathroom vent fan.

Bathroom exhaust fan duct attic. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. Bathroom code does address the issue of moving odor and moisture laden air from the bathroom to the outside. Because the fan is in the attic you ll hardly hear it.

Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. If you have a bathroom with a separate enclosed toilet you ll also need an additional fan for that space. A single exhaust exits through the roof figure a. The fan and light operate separately or together and are housed in a classic white design that complements any decor.

You mount a switch in each bathroom. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent. Surprisingly bathroom fans are not required by some building codes. The nutone white 50 cfm exhaust bath fan the nutone white 50 cfm exhaust bath fan with light combines efficient air circulation and up to 100 watts of illumination in one easy installation.

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. Avoid venting through a soffit vent or ridge vent. This system is quiet too. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

We explain how to install bathroom exhaust fans or vents the vent ducting. There are wall mount exhaust fans as well as ceiling exhaust fans. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. 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.

In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out. Ceiling fans vent either into the attic or outside through the roof. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.

If you have access to the attic the fan can vent either through a gable wall or roof. Another consideration to think about is the placement of your fan. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. Options for venting a bathroom exhaust fan include best to worst.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details.