Bathroom Fan Ventilation To Attic

Options for venting a bathroom exhaust fan include best to worst.

Bathroom fan ventilation to attic.

The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood. Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair. The vent hood will have a little flap that opens when air is blowing through the vent but at other times it will remain closed. Surprisingly bathroom fans are not required by some building codes.

You mount a switch in each bathroom. Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside. Bathroom exhaust fans perform an important function by removing excess moisture from your home. If you vent through the roof condensation will drip back into the interior.

Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. I recommend that my clients vent their bath fans out a gable wall if at all possible when not using an hrv or erv that is. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. Without properly installed ventilation rooms with high humidity can experience paint or wallpaper peeling or costly damage to drywall and wood structures.

Vent your bath and kitchen exhaust fans through the roof through a special roof hood. How to install a bathroom vent fan. To determine which size fan to buy for your bath multiply the room s square footage by 1 1. The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall.

In those areas ventilation in bathrooms is required but it can be from a window or fan your choice. We explain how to install bathroom exhaust fans or vents the vent ducting. A single exhaust exits through the roof figure a. Look for the special fans starting at 160 at heating cooling equipment.

No you cannot vent your bathroom exhaust fan into the attic. Because the fan is in the attic you ll hardly hear it. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Either way the vent will have to go directly to the outside and installed with a vent hood cover.

This system is quiet too. 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. If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. You should never exhaust the bathroom fan directly into the attic.

Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating.