This AC is capable of vibrating the entire wall and will make an annoying vibration a story above and below the AC. I took the first one back thinking it was defective, but this one does the same thing. Other brands I've owned have never been this loud while the compressor is on. The plastic face vibrates, the styrofoam inside vibrates, and the way it is molded inside creates a channel that whistles annoyingly when the fan is on low. This causes me to need to run the fan on at least medium to drown out the whistle from the fan itself. Absolutely terrible and I will never buy another GE appliance.