I just picked up one of Penn State Industry’s AC1000 Air Cleaners. So far, it looks like a pretty high quality unit, reasonably heavy duty and well made.

http://www.pennstateind.com/store/ac1000.html

I sat it on my workbench to try it out before hanging it. When I turned it on, I noticed a significant but low-level vibration which makes the entire housing shake a bit. It’s a fairly low-level shimmy. The “amplitude” of the vibration is not enough to create any extra noise that I can hear. Overall, the unit is reasonably quiet even at the highest output.

I called Penn State and was told that all of the air cleaners vibrate to a certain extent. He said that all the units are tested before being shipped, and he assured me that it was within the limits of what should be expected with that unit.

I really have nothing to compare it to, so I was hoping to get some feedback from some other folks who may have this (or another) unit. If there is someone in the Philadelphia area whose air cleaner I can actually see working, that would be a real bonus.

Thanks in advance!