Barb, maybe you could put some carpeting with a padding under it where you hang out the most, so the vibrations from the A/C unit would not reach your chair? Actually, if they wanted to they have three options to reduce the vibrations from the unit, they could use a device which modifies the power fed to the compressor motor, I believe it is called a power factor controller, which is mostly designed to reduce power used by a motor. I have seen it demoed in Home Depot stores and you can feel how much smoother the motor runs, and they show a meter that proves it cuts the amount of power used. They could probably change or beef up the compressor motor mounting, to stop the vibration from going through the floor. OR they could just replace the whole unit with a new one. YOu will say why would they spend that kind of money, right? Well my folks replaced a working 14 year old a/c unit and cut their electric bill to less than one third! from $268 to $80!!! Plus the electric company gave a rebate of several hundred dollars towards the cost of the new unit. This saves them money by not having to built new or bigger power plants. I don't know if that is done by other power companies? Now here is the joke for the New Year: A guy goes into a lounge and the Maitre D' tells him he needs a necktie to enter. He says "I don't HAVE a tie!" The M.D' says he can use anything that resembles a tie. So he goes out to his truck and finds a jumper cable, and drapes it around his neck. He goes inside and the Maitre D' says "Well I'll let you in with that, but you gotta promise not to START anything!" Okay, no more jokes until tomorrow! [log in to unmask]