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Old 08-24-2020, 01:15 PM   #1
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Two story house with two A/C units question about supply vent location


I have a two story home in central Texas, with a 2 ton unit (Downstairs) and a 2.5 ton unit (upstairs) the first floor and second floor are closed off to each other other then the stairwell with a thermostat on each floor.

My question is why is there a supply vent directly above the stairs landing that blows down the stairs?

The reason for this question is I'm planning on install a whole home dehumidifier and I was thinking I could make the current supply vent above the stairs landing as the inlet to the dehumidifier.

Will my Idea work?

I do A/C maintenance but never messed with duct locations.
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Old 08-25-2020, 09:04 PM   #2
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Re: Two story house with two A/C units question about supply vent location


To fight the hot air rising up the stairs.


It should work, but your A/C may have some troubles without that supply.
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Old 08-25-2020, 09:07 PM   #3
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Re: Two story house with two A/C units question about supply vent location


Don't eliminate supplies or returns, nothing good comes from that - add what you need for the dehumidifier.
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