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Old 07-11-2013, 10:35 PM   #1
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Old AC Plumbing advice


My AC/Furnace is working fine however I was wondering what I could do to fix this weird setup I have. THe furnace pulls air from above the unit and forces the air down into the ducts that are insulated and under the crawlspace of my home. Here is pics however of the plumbing of it. The Coolant lines and Condensation like exit through down through the insulation and out of the house, but there is also this strange 3inch pipe that sits next to it. I have the backup condensation hose sitting in that, but the pipe just goes through the insulation and sits in my crawlspace.
I was thinking that wouldn't the air from the blower draw from under the house as well as the intake vent?
And also is it ok for there to be an opening in the door of the furnace where the handle would be?


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Old 07-12-2013, 02:10 PM   #2
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any advice on how to seal this, or if it would be a problem?

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Old 07-12-2013, 08:35 PM   #3
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is there AIR sucking over or blowing out over those pipes pack insulation in there..if your sucking air then that temp is mixing with the house return and adding a false load...blowing out cool your losing air up into the house...hope this helps. where is this air handler ...attic... crawlspace..closet??? that looks scary in there
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Old 07-13-2013, 03:10 PM   #4
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it's just in the utility room, return air pulls from above the unit and is forced down to the ducts, but I was concerned it may also be pulling from the hole in the bottom of the unit. Would packing insulation and duct taping over this suffice?


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Old 07-13-2013, 04:08 PM   #5
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YES, buy some of the LOW expanding 3M spray foam insulation from HDepot in the caulking, window repair and weather stripping dept. and carefully spray it in. The high expanding stuff will make a huge mess and is for large areas.
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Old 07-13-2013, 05:29 PM   #6
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roger that i'll use the extra for my dogs house. anyone know how to reuse that stuff. I've tried unsucessfully many time to be able to reuse an old can.
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Old 07-13-2013, 05:42 PM   #7
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The cans are a one-usage situation...unless you purchase a foam gun

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