i am tryin to determine the best way too install a croos duct. I have a modular home and it has a 12FT x12" cross duct I do get some air but only about 10% of what is flowing through the other side. I have replace the cross duct bnut that did nothing to help. Would it be best to us a hord 12" duct or should the size be reduced. Our home is 2000 sq feet. I need good ideas to cool both sides as equal as possible.
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