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Old 04-25-2012, 08:50 PM   #1
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Return Vents and Air Handler Question


I have a small guest house that has some AC issues. The AC blows cold air but doesnt cool the room fast or at all sometimes. Here are some things I found. The air handler is located in a closet sized area with a return vent located on one side for the garage and one on the other side for the living area. A. There is no duck work from the return air vents to the air handler. The air handler just has two holes cut in it, each facing the return air vents and filters. Each hole in the air handler sits about a foot away from the wall vents. B. The room where the handler is, is wide open to the attic. That means it is pulling air, un filtered straight into air handler cut out holes from the attic. Question is. Shouldnt there be vents from the intake vents to the air handler cut out holes? Also shouldnt that room be sealed off from attic? I know. Its a mess.

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Old 04-25-2012, 10:40 PM   #2
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Return Vents and Air Handler Question


First. Thee should be no supplies or return that go to the garage. Its a code violation, so seal them off. And yes, seal off the attic to that room also. A duct for the return won't be needed after sealing those things.

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Old 04-25-2012, 10:44 PM   #3
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Return Vents and Air Handler Question


Quote:
Originally Posted by beenthere View Post
First. Thee should be no supplies or return that go to the garage. Its a code violation, so seal them off. And yes, seal off the attic to that room also. A duct for the return won't be needed after sealing those things.
I agree 100% not communication to garage from heating system.... its a big big no no...................
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Old 04-26-2012, 07:53 AM   #4
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Return Vents and Air Handler Question


Thanks. I should have mentioned that the garage
is not used for a car but as a wood hobby shop. Does that matter as far as code?
The previous owner used it as a storage area. I may temporarily seal them off
because Im going to convert the garage to more living space. By sealing them off will I be overloading the AC system in any way?
Thanks again.
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Old 04-26-2012, 04:53 PM   #5
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Return Vents and Air Handler Question


As long as there is a door opening large enough to drive a car through, you can't have any ducts to it.

May end up needing to add a supply and return else where in the house until you convert the garage.
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Old 04-26-2012, 06:05 PM   #6
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Return Vents and Air Handler Question


Thanks and got it. Will remove all duct work from garage. I guess thats because of fumes from cars entering through the intake vent? Interesting. I closed ,(sealed) off the attic from the air handler area and now the AC cools even less and the temp in the room rises. When I open the attic door the air starts to cool again and the temp falls in the living area.
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Old 04-27-2012, 05:28 AM   #7
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Return Vents and Air Handler Question


Sounds like you have a return air problem. Not enough return, and the air handler has to pull in attic air to have enough.
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Old 04-27-2012, 07:44 AM   #8
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Return Vents and Air Handler Question


That is my guess too or when I open the attic the
hot air in the room excapes. Good news is
after running an hour the temp in the room did fall
to 72 degrees. Im going to let it maintain that temp today
and see if it can once it gets hot outside. Thanks

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