How loud is the blower on your unit? I'm not sure if we have a vibration problem or it's just the norm. I know it's difficult to gage,but this thing is driving me nuts. You can hear it from every room in the house. There is no way I could sleep in the same room with it. It is in an adjacent room and you have to turn up the tv quite loud to hear it. Have any of you questioned/complained about the noise level with your installer?