Hello. This is another question about AC on the roof of a condominium. I am on the top floor of the condo. When a single AC unit turns on, I get vibrations through the walls. The builders put spring lifters on the AC units but this didnt help. The issue is with the vibrating "tubes" from the roof units which go down through the walls. Any suggestions on how to dampen the vibrations from these as they pass through condo walls?
Thanks so much.