I have this unit in my home office which is upstairs in a bonus room. It is quite loud. I have to turn it off sometimes before getting on a call. I just hope the calls do not last long :)
It's also a little strange on the temperature controls. I can set it to 72 and It will go all the way up to 76-77, but then come back down. I've doubled check the instructions and seems to be setup correctly.
It's a great unit for the price though.