@ostemo8 I didn't mean to hijack thread from your electrical concerns to the noise issue, AC quality is an important issue, its just that its common to see threads attendant to electrical noise on AC grid and or home AC, I see very few threads on the environmental noise issue. Outside of the audio equipment itself, AC quality, listening room treatment and noise pollution (both home and external generated) are equally important for maximizing system potential.
The most irritating thing about ambient noise levels is often one has very limited control over it. Rock-on has great ideas for minimizing it, but many of us don't have option to implement all of those ideas. You can turn off your HVAC at certain times, but other times you just have to put up with it, the issue is once you've experienced those magical listening sessions when ambient noise levels were at their lowest, subsequent listening sessions with higher ambient noise levels may impact your enjoyment.