Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities.
Attic furnace no return plenum.
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When you place a furnace in the attic to take advantage of its.
That would then reduce the flow of conditioned air to that space.
Insulating the plenum on a forced air system.
For the system to work you have to re circulate the air back to the furnace.
Ensure proper return air flow for your 17 5 ensure proper return air flow for your 17 5 in winchester residential electric furnace application with this easy to assemble return air box.
If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure.
If the space is conditioned it no longer is an attic and needs to be called conditioned space wiring within an area used as a plenum has to be in conduit.
While none of these spaces makes an acceptable air pathway on its own some building cavities such as floor joists can make acceptable duct chases to contain an insulated air sealed metal or flex supply.
Watch as a pro quickly assembles the return air plenum and shows you how to do the same.
A furnace in the attic is a design that works for all homes.
The flexible design allows for connection of a new or existing side air return on either side based on the placement of the reinforced sheet metal panel of the return air box assembly.
If you had no return air in your room you would create a positive pressure.
You might not receive the same air movement benefits if the unit is in a garage either.