Venting this fan into the attic is simply asking for problems. Bathroom vent fans must be vented to the out of doors. The excessive moisture will cause condensation on the roof members, insulation and eventually cause mold.
It is never OK to vent directly into an attic even if the attic itself is vented. Exception: Whole house ventilation-type attic fans that discharge into the attic space of dwelling units having private attics shall be permitted.
No matter the location of the bathroom , you can vent the exhaust fan through the wall.
Ductwork is what will connect the fan to the outside.
The location of the bathroom will determine how extensive the ductwork will be. However, bathrooms that are further from an exterior wall will . Special bathroom fan roof vents with an internal damper that opens only when the fan is blowing will send moist air outdoors and keep cold air out of the house. Jeff Howell your property problems. This week: venting from bathrooms and slow-to-start shower pumps.
I have just replaced the bathroom extractor fan and found that the exhaust is vented into the roof space and not the outside environment.
Due to the shape of the roof there are no soffits to vent through, so it has to go through the roof. Historically, extractor fans were vented into the attic of the home. First off, I have two bathrooms with bathroom fans.
Each fan vents into its own white plastic tube which runs the length of the attic and ends up near the open louvers. However, the end is just hanging there, inside the attic , but next to the louvers. Therefore, if you vent warm moist air from your bath fan thru your soffit, the soffit will just draw that same warm moist air back into your attic.
The damper protects clod air flow back in the bathroom , so it needs to be as close to the insulated portion of the exhaust (near the fan ) as possible.
Other venting options includes running the duct up through the roof or down through the soffit. In this video we use: -Screwdriver -Flex hose -Dampener -Flex hose tightener rings Befor. The second floor bathroom exhaust terminated in the attic. It was full of frozen condensation essentially disabling the vent.
Warm, moist air should be vented the the exterior and in cold climates can create considerable condensation in the attic when vented inside there.
Insulated vent pipe from the fan to the exterior is best. Where in the world are you reading that bathrooms can be vented directly into attic space? The powerful fans can slurp up massive amounts of moist humid air that rises to the ceilings as you shower.
Our article BATHROOM VENTILATION CODES SPECS cites the importance of venting bath vent fans to the outdoors, not into an attic or crawl space. As was said in the comments on your question, you get additional efficiency by clearing hot air in the attic in the process. Ventilating the home and the attic in greater overall cooling by reducing heat that would conduct back through any attic .
No comments:
Post a Comment
Note: only a member of this blog may post a comment.