Title 24 qualified bath room vent fans
jzr756
| Posted in Energy, Heating & Insulation on
Does a bathroom ventilation fan which meets Title 24 standards have any to do with how the fan housing seals against or adjacent to the surface of the drywall which surrounds it ? In as much as the small gap created when following the housing flange with a tool such as a dry wall router? Or similar to how Title 24 requires “Air Tite” recessed lighting fixtures?
Replies
Interesting question
I doubt it has anything to do with the housing or the air-sealing of the installation. I just installed a couple of Panasonic Whisper-Green fans, which are Title 24 qualified (along with a whole bunch of other progams) and there is nothing special about the housing itself that I can see. In fact, the dampers are not at all impressive, so there is definitely going to be some air leakage backdrafting through the duct if there's ever a pressure differential. I installed inline butterfly dampers to try to improve that.
Anyway, my guess is that it has to do with electrical usage. The fans I installed have DC motors and use very little power.
Inline dampers?
I've never seen these, tho I haven't looked too hard either. Here, the selection of air exhaust parts quits at snap together pipe and cheap wall and roof caps. Got a link or manufacturer?
HVAC parts
I order stuff from a wholesale house called Gensco, or from national vendors like Resource Conservation Technology or Energy Federation Incorporated. A butterfly damper looks like this: http://www.youtube.com/watch?v=IucvdDc55ks
You can download the EFI air-sealing catalog, well worth it.