Just to walk through the picture slowly, I see the 3 boxes for the return. They appear to all be ducted back to the left large box in the picture, which would be on the outer layer. The supply comes to the right box in the picture (outer layer) then ducted to the middle box which has the outlet into the room. So the middle boxes is mounted to the inner room? It must fit between the studs? How does the duct from the right box get to the middle box without going through a stud (I'm going to go back and scan the pictures to see if I can answer my own question here).
Does the dark vs. light gray in the ducting indicate rigid vs. flexible coupling? What materials/products were used?
Regarding the small boxes between the joists (or big box between studs), is there concern that the air gap is being consumed with the boxes? My understanding is that they are attached to the inner room/leaf so the top of them may be very close to the outer layer above?
Thanks!
Gregwor wrote:Sure! The reason there are 6 boxes instead of 4 is because we were limited for space. We needed the air to flow across the entire room and the supply is coming from the middle large box. That meant that the return had to be on/near the opposite side of the room.Can you explain the HVAC scheme in a little more detail? I see six boxes were made. How does the air flow through the system, and how is routing done with respect to the inner and outer room walls?
Instead of putting a huge box inside the room, I decided to try and fit silencers up in the existing joists. In order to have enough cross sectional area and get the air velocity low enough, I needed 3 boxes. After seeing/testing them in real life I realized that making those little ones slightly longer (maybe a 4th or even 5th baffle in them) would have helped some.
There is one fan on the return side of the system (in his storage room) that pulls air through the entire room/system. On the first page of the thread you can see the system. Here's a link to the picture I'm referring to:
http://www.johnlsayers.com/phpBB2/downl ... &mode=view
The reason I put the supply sleeve where I did was so that it would supply fresh air right above where Darren might put his mini split head. That would allow the head to throw nice fresh air around the room then have the 3 little return boxes suck up the stale air from above where Darren sits at his drums. Does that make sense?
Greg