Box for return for new Air Handler


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Old 09-17-09, 11:03 AM
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Box for return for new Air Handler

I am removing an old fuel-oil air handler from my laundry room and installing a new Rheem 4-Ton air handler (RHKA-HM4821JA) in the garage (next to the laundry room).
1. Where can I find plans to build the new return box in garage?
2. What advice do you have for removing the old air handler?
 
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Old 09-17-09, 12:58 PM
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So your replacing an oil furnace with a heat pump correct?


Where can I find plans to build the new return box in garage
You can't, every transition is different. Have to take measurments and fabricate it. You can buy pre - fabbed return drops bur still need to field adapt.

What advice do you have for removing the old air handler
Take your time and be careful, removing the old equipment is the easiest part.
 
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Old 09-19-09, 08:10 PM
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What you need is called "PLENUMS". You'll most likely need 2.
One for the incoming air called the "return plenum" and one for the outgoing air called the 'supply plenum'.

For a homeowner DIY plenum here's the easy way. .......
It does involve a little work on your part. If you can't do this you'll need to call "the man."

Make measurements. Draw up a preliminary drawing.
Fab up the critical pieces that won't work unless they are the correct size with CARDBOARD. Use box cardboard to make one side or the bottom or whatever you need to visualize and make sure you have designed it correctly.
You don't have the build the complete thing with cardboard, just make sure what you come up with will work.

Modify your drawings according to what you see you need.
Take your drawings to your local sheet metal shop and have them make the parts for you.
They will be your "fab" shop.
BTW, have them insulate inside the plenums for you.
BTW-2, they will build whatever you say so if it doesn't fit, it's your responsibility to recoup, redraw and resign the check for new parts.

This is how most HVAC guys do it.

You will still need some sheet metal sheers and a few tools to cut the duct connection holes.

If your handy with your hands, you can do this.

Actually if you are going to do the entire installation, you are going to need a LOT of tools.
 
 

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