Timeline for How do I vent 3 bathroom exhausts out the roof
Current License: CC BY-SA 4.0
13 events
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| Mar 25 at 14:35 | history | undeleted | BMitch | ||
| Mar 20 at 21:06 | history | deleted | popham | via Vote | |
| Mar 19 at 16:07 | comment | added | popham | @chen, I wouldn't worry about what little bathroom moisture comes through the backdraft damper. It's nasty smell that worries me. You could burn incense below each fan while the other/others was/were running. The smoke would give a visual indication of any air circumventing the dampers. Putting incense at the active fan, you could also subjectively smell test in other bathrooms in search of the incense smell. A single instance of the latter test would make subsequent tests difficult because of lingering smell from the earlier test. | |
| Mar 19 at 15:33 | comment | added | chen | Ad far as measuring whether I like the performance of the manifold solution, I'm not sure what I would do. maybe stand in one bathroom while a hot shower is being run in the other to see if there seems to be any humidity coming in? Maybe I should get some humidity sensors to quantify it. Could be a fun experiment too. Also considering additional backdraft dampers right before each of the 3 ducts enters the manifold. | |
| Mar 19 at 15:28 | comment | added | chen | Thanks for the detailed reply. I'm leaning toward doing it this way. The manifold or "splitter" for 3 ducts going out 1 roof penetration. You made a good point that if I didn't like how it was working, I could always add in 2 more. | |
| Mar 18 at 16:31 | comment | added | popham | @Jimmy, the linked commentary talks about the dampers, but you're right that their existence should have been explicitly mentioned here. | |
| Mar 18 at 16:28 | history | edited | popham | CC BY-SA 4.0 |
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| Mar 18 at 16:09 | history | edited | popham | CC BY-SA 4.0 |
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| Mar 18 at 14:17 | comment | added | Jimmy Fix-it | Agree, and it's worth mentioning that modern bath extraction fans typically have a gravity and/or spring action damper that, more or less, eliminates reverse air flow. | |
| Mar 17 at 21:01 | history | undeleted | popham | ||
| Mar 17 at 21:01 | history | edited | popham | CC BY-SA 4.0 |
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| Mar 17 at 20:50 | history | deleted | popham | via Vote | |
| Mar 17 at 20:48 | history | answered | popham | CC BY-SA 4.0 |