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Another HVAC Location Question

post #1 of 8
Thread Starter 
Hello Everyone -

This question is specific to the placement of the HVAC return. Most theaters I have seen on here have their return located under the soffit, rather than on the riser of the soffit. Is there a particular reason for this? I have the option to do either, but I would think that the best performance may be on the riser part of the soffit.

Many thanks!
post #2 of 8
By riser I assume you mean side of the soffit? Anyway...answer...warm air rises. tongue.gif. Really, it doesn't matter.
post #3 of 8
I've been considering putting my return on the bottom face of my soffit because I'll be able to make it much larger in order to get the velocity down.
post #4 of 8
There is no forced air in the return. It is recommended to have a similar sized for the return for aesthetics and volume. They don't have to be though.
post #5 of 8
It's not uncommon for theaters here to have a powered inline fan in the return. I'm dealing with that issue in my theater now, I think the Black Cat Theater used inline fans in both the supply and return, and I believe NicksHitachi's theater and Moggie's theater had similar issues, but I can't swear to it. Those are just a few that come to mind when I start thinking about inline fans.

At any rate, Shawn is correct (was there ever any doubt smile.gif ), with no "powered" return you shouldn't have an issue if the return grill is the same size as the inlet, assuming the inlet is quiet and you have a balanced system.
post #6 of 8
I'm going to use one of these:

post #7 of 8
Thread Starter 
I have 2 deadvents (one supply and one return) that will each have an inline fan, probably Fantech.
post #8 of 8
Make sure the surface area of your vent is at least as big as that of your soffit. That will often push you towards putting the vent on the underside of the soffit.
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