I have a 7.5 ton Trane air handler in a janitor closet. The tape joint at the plenum is flapping in the breeze on the back side of the air handler. There is only about 2-3" clearance between the A/H and the wall.
Looking for advice on how to retape/seal that joint. I can only reach about 6" on either side of the A/H and with it leaking the tape is not wanting to restick. Thanks.