How to seal wall opening for AC lines?


Old 01-15-21, 05:15 PM
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How to seal wall opening for AC lines?

All the air conditioner lines (power, copper, etc.) running through the siding and into the utility room are coming through one large hole. The outside is sealed up with what I believe to be duct seal. In my furnace room though, it's just an open hole in the sheetrock that is about 3"x5" with all the lines coming in the room. What can I do to close up this hole in my wall? Do I use duct seal inside or maybe some type of spray foam?
Old 01-15-21, 09:31 PM
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Spray foam would be a good way to seal the hole from the inside.
Would add a little insulation too.

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