On cleaning my ductwork to prep for insulation, I discovered a hole in the main duct. It's the same size as the holes for the ducts that branch off and lead to each room.
Can anyone tell me the right way to cover it? It was covered with a square of metal duck taped onto the main duct. Of course, the tape has long since stoped sealing the crack. Wild guess -- this is not what a pro HVAC guy would do?
For the moment, I have it taped back down with foil tape.
Thanks for any advice.
Dave Byrne