Bathroom Fan Venting Into Attic For 50 Years

Venting into the attic moisture in the home can be the source of many problems and addressing this issue is critical in preserving the functionality of a structure.

Bathroom fan venting into attic for 50 years. 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. It s all outdoor air anyways right. If the bath fan in your home is more than 20 years old chances are it s pretty loud. Bathroom ventilation fan duct routing routing a bath vent duct down out or up through an attic or roof out.

Bathroom and kitchen fans. It seems like such an easy solution just leave a bathroom vent hose in an attic. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. In order to accomplish this the roof has to have a hole cut in it.

However you can vent a bathroom fan through an attic while it terminates on the roof or gable end. In all cases the ducting needs to conduct the exchaust to the building exterior and needs to terminate in an animal proof vent cover. The bathroom vent you see on the picture is slightly above the floor level it s actually just a register fan motor installed in the attic above and i personally guarantee that in this location works like a charm there s one more bathroom vent above the shower stall. Depending on the location of the bathroom it may be easy to vent the exhaust fan through the roof.

This involves running ductwork from the fan usually though an attic and out through the roof. 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. Worse yet your old bath fan may not be moving enough air to keep your bathroom free of mold. No you should not vent a bathroom fan directly into an attic.

It is because of this that many builders tend to advise against this method. 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 loud fan may be good for masking bathroom noise but the jet engine roar is downright annoying the rest of the time.