Product review (1 stars): my wife hate it
This product exhaust system is different with my current one, however, there are three concerns for the household devices: the power of CFM, the lights and the exhaust system, the UMC 30 has the combination advantages for the three, especially, it deliver less noise than my current 220CFM, the air flow is vented to a proper new installed ventilator.
2 weeks has gone by, the lousy fans starts to make a  negative vibration remarkably, you have to wash the filter everyday, or it smells like a grease ball, I will dump it out a year later