A/C registers and ceiling fan spacing
user-7426231
| Posted in General Questions on
Hopefully this hasn’t been asked and answered previously – did a search and couldn’t find anything pertinent –
Is there any sort of industry standard (ASHRAE, ACCA, ANSI) or code guidance (UMC, IRC) as to the proximity of ceiling mounted air conditioning diffusers and ceiling fans? Â There’s no shortage of anecdotal ‘…generally speaking’ and ‘…as a rule of thumb’ advice, but I haven’t found anything else.
Thanks.
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Replies
I'll give your post a bump to see if anyone can answer your question. As far as supply placement, I know you want to avoid locating them where they will be blowing on occupants. Also... If you build an efficient structure, ceiling fans are not necessary. I haven't had any in my last two homes.
Hi user-7426231 (It would be great to get your real name).
I'm not very knowledgeable of HVAC, but I would imagine that it is important to get this right. HVAC designers are counting on how registers throw air into a room to make sure that it is a comfortable space and I have to imagine that a ceiling fan has an effect on this. Maybe it's a positive or neutral effect, but I am curious to see how this is answered by some of our member with HVAC expertise.
The most likely place to find that would be in the ACCA Manual T (https://www.acca.org/store#/productDetail/7173AD5F-BC20-E511-80FA-C4346BACEBF4/). I looked through the whole book and didn't see anything about ceiling fans in it. It's probably not there because ceiling fans do a lot of mixing of the air in a room, so the performance of the vents themselves doesn't really matter much when a ceiling fan is running.