I’ve been sealing a lot of gaps and holes in my central unit. I need ideas for one gap from some of you smarter and more experienced people than me.
There is a significant gap between the coil housing and the plenum. The plenum is beyond the coil housing by a good 1/4" to 3/8" across the back side of the unit. Not much space to work back there but I would like to stop losing so much air to the basement from it. Any ideas?
Thank you in advance.