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Old 10-25-2011, 09:31 PM   #1
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Help with Return Plenum Solution


I was wondering can this be done?

Sketch isn’t to scale but just for reference. The one problem we have to overcome is the lack of a proper return plenum/vent on the second HVAC unit. This will potentially solve both

See picture

HVAC unit is in the closet in the picture on the right(or bottom) of post #51. You can see return vents in floor and wall in the lower right corner of the picture. What I want to do is create a column from the floor (closet ceiling) to the second story ceiling and enclose a return plenum AND the wood stove chimney. Can I place the return plenum duct above the wood stove location? Goal will be to build this entire structure out of non-combustible materials. If we proceed with this I will probably include two PVC pipes that terminate in attic and are capped off for a "new variable speed" type furnaces just in case. Since the standard furnace pipe is PVC does this have to be "walled" off inside the column? I'd assume PVC can melt this close to a chimney? Is there a non-combustible replacement?
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Last edited by ChrisDIY; 10-25-2011 at 09:37 PM.
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Old 10-26-2011, 06:32 PM   #2
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Help with Return Plenum Solution


More pictures for clarification.
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Help with Return Plenum Solution-2011-10-26-19.20.56.jpg   Help with Return Plenum Solution-2011-10-26-19.19.14.jpg   Help with Return Plenum Solution-2011-10-26-19.18.57.jpg  

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Old 10-26-2011, 06:33 PM   #3
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Help with Return Plenum Solution


Trust me I didn't do this...

I put in as large of a ceiling fan as I could find to try and push air down and it works "a little." Getting the return as close to the ceiling is the only real solution. As far as wood stoves go we want something soapstone like the RAIS Bando so something similar to sketch. They didn't have any soapstone units in the object gallery.

Getting "Fatal Error" on trying to upload another picture, I guess I am over the limit?
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Old 10-31-2011, 09:06 AM   #4
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Help with Return Plenum Solution


The only thing I could find states that the return grille has to be 10'+ above the top of whatever woodstove we install.

I am going to guess that no responses mean this is straight forward?
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