2 bathroom exhaust fans vented together, mold problem
bcon268
17 days ago
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Bathroom exhaust fan installation in the north
Comments (2)Good that you realize the soffit issue with an exhaust vent. Either block off the soffit on each side from above, or could you possibly replace some of the vented soffit from below with solid material? There are higher quality roof vent hoods available. Fantech or American-Aldes are two sources that I've used. A roof vent can be added without damaging the integrity of the roof, just pay attention to the details and work carefully. Are the prevailing winds in your favor to limit snow accumulation in the proposed location? While your at it, consider adding a fan timer at the wall switch to insure the required ventilation time it takes to remove all the bath moisture....See MoreBathroom exhaust fan not connected to vent!
Comments (8)Thanks all, I finally got access to the condo's message board and got some help from another resident. He said the ductwork was there and said something about a "door" in the fan unit. I poked around inside of it again and lo and behold, a small piece of sheet metal fell off the side of it and there was the duct! The sheet metal piece had a piece of tape on it that I think may have been a hinge, of sorts--so that it would flap open when the fan was on and then fall back over the duct opening when the fan was off to keep drafts out. But a thick coating of greasy dust had kept it from working properly, and also made it hard to see that that's what its function was. The duct opening is only about 1x2", not the big 3" or 4" round opening that I was thinking it should be. It's still not a great fan but at least it's not blowing all of the air right back into the room! And I will have to figure out how to put that flap back on once the weather gets cold, but I have a bit of time before that will be necessary. PS-- no window in that room, unfortunately......See Morebathroom exhaust vents
Comments (13)Personally I think the fewer penetrations through a roof the better. I also don't see anything inherently wrong with venting two bath fans through a single roof opening. Even if both are on at once, probably the worst thing that will happen is that they back pressure each other and they don't vent quite as efficiently. Both of my bath fans are vented through the same soffit vent....See MoreVenting 2 bathroom fans
Comments (3)You may want to crosspost this in Heating and A/C, there's a lot of HVAC folks there who can confirm, but I looked into this (we are also in Wisconsin) when we were adding a fan to our master bath and it was a no-go because of backdraft, iirc. Can't remember if it was against state building code or just not recommended. We ended up just running it straight up through the roof - just do (or have done) a proper installation with the right materials and you shouldn't have any leaks....See Morebcon268
17 days agobcon268
16 days agobcon268
14 days ago
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