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Jul 16, 2018 at 13:09 comment added Josh Withee I wouldn't permanently seal them. If it's something that would be ok, I would start by looking for vents that seal completely. I've seen the vent covers before but to my knowledge those are meant just for return-air vents. By the way, do you have professional experience or source to back up the idea that it wouldn't be harmful to the central air system?
Jul 16, 2018 at 13:01 review First posts
Jul 16, 2018 at 14:13
Jul 16, 2018 at 13:01 history answered Sam CC BY-SA 4.0