Possible HVAC Silencer Design I hope

[DreaminDrumBeats]

Well here is a rough Idea of what I had in mind. A slightly underdetailed framing detail, didnt put all studs in that are on 16" OC because it would look to clustered and confusing

Exterior Box and Interior Partitions have all stud cavaties filled with rockwool and cover with cloth NOT SHOWN

Exterior Box is sheathed with 3/4 mdf and one Layer of 5/8 Sheetrock NOT SHOWN

And yes I understand that this design creates alot of static preassure

[sharward]

This looks so cool! Thanks for doing this, Doni.

It took me a while to differentiate between your measurement lines and the lines that are supposed to represent materials... If you have the time and wouldn't mind updating the image so that the measurement lines are a different color or something, I'm sure that would help a lot.

Unfortunately, in my case, my "inside the room" silencers can't be that large. Code requires that I have a 7', 6" minimum finished ceiling height throughout the room. My finished ceiling will be about 8', 9", so that only leaves me about 15" of height including the mass at the bottom of the silencer. I'll be lucky to have 12" to 13" of vertical air space within the silencer. I've got room for width -- I was figuring about 24" -- and I planned to go the width of the room for its length -- about 7', 10". I'm planning to use the inner leaf wall and ceiling mass as the mass for the silencers so that I only have to finish two sides of the silencers inside the room.

Whatever I do inside the room, I plan to practically copy for the "outside the room" silencers, only I'll rotate them 90 degrees so that they're taller than they are wide. This will help align the two silencers (since the ceiling is higher outside the room) so that a horizontal flex duct between the walls can connect each pair.

This will be one of my final steps in my project, so I'm not going to worry about it too much before then. Contrary to what some people might think, there are some things I'm willing to "not plan" until I'm at the point where I need to!

--Keith

[DreaminDrumBeats]

Well I designed it to be flexible so in your case just shrink the height for it inside the room. And hey as I said before I like the design aspect of things so, this was a treat for me to come up with it. But I'm waiting on the pros to tell me if it would even work or not and if it does your more than welcome to use this design when the time comes for you to build the silencers.

[drfrankencopter]

I'm no pro, but I think it would work...

You'd want to line the duct with 703 or some other kind rigid/absorbtive material. Might also be a little better if the 2 inner partitions were a little longer, as it is, air doesn't have to make a real big 90 deg corner to get through those ones

Cheers,

Kris

[DreaminDrumBeats]

More like this?

And thanks for chiming in Kris any and all input is appreciated

[sharward]

Having the measurements in blue helps a lot, Doni! Thanks!!

[DreaminDrumBeats]

Your welcome Keith