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Reply by MrRon

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Posted on Tapping into Plenum for temp AC in Fl garage shop

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MrRon

5940 posts in 4122 days


#1 posted 07-12-2018 10:12 PM

Not a good idea. An A/C system, in order to work efficiently has to be balanced room to room within the house. Tapping off the house A/C to feed the garage, will through the balance way off. Remember if you divert air to the garage, there has to be an air return to achieve balance. If the house has been properly sized for an A/C system, you may not have enough BTU’s for the garage to share. I speak from experience. I had ductwork extended to a large room that was formerly a garage. When I did, my A/C system couldn’t keep up with the added load. It ran continuously (not good), so I had to upgrade the A/C for a bigger unit.


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