Bathroom Exhaust Fan Flapper

If you have a bathroom with a separate enclosed toilet youll also need an additional fan for that space.

Bathroom exhaust fan always on. Makeup air intake ports can be as simple as a clothes dryer exhaust cap that has holes drilled in the flapper. Once you discover where the fan is hitting turn of the exhaust fan. Turn on the exhaust fan and use a flashlight to check where the fan is hitting in the housing.

The first and cheapest step is to get some of that soft foam self adhesive weather stripping tape. Conventional bath fans can allow hot air into your home during the summer months and cold air in during the winter. Well gerry we cant always stop it but we certainly can tone it down.

Another consideration to think about is the placement of your fan. This does not provide a positive seal to stop the air leakage. Insulate around the flexible hose or metal duct that leads from the fan housing to the outdoor louvered cap.

This will help reduce the loss of indoor heat to the outdoors. Do not tightly seal the gap beneath the bathroom door. For quick reference a 50 square foot bathroom needs a 50 cfm fan.

Ceiling fans vent either into the. This is like leaving a window open. Tape it to the exhaust hood where the flapper hits.

Gerry has a bathroom exhaust fan damper that keeps him awake at night. Many common bath exhaust fans use a single plastic flapper to attempt to reduce this air leakage. Use any flat screwdriver to adjust the blower wheel so that it cant hit anywhere in the housing.

It is entirely possible that back drafting is happening in the bathroom fan exhaust pipe as it becomes the point of entry for air needed by another appliance that is sucking air from the house.