Noisy Air Ducts
I just had a new Lennox HVAC system installed. I have forced hot air. When the air conditioner was first turned on, it was quiet, but now I hear a loud vibrating noise. The main air duct is in the wall between the kitchen and the family. I do have a basement. I can hear and feel the vibration. I never had this problem before with the old system. Do you have a solution?