My second unit is quiet but the fan still has a wobble like the first unit. The first unit was quite for 2 hours then started making noise. The unit would be perfect if the fan ran true without a wobble.
I'm using the BreatheSmart 75i in my shop. Recommended by Consumer Reports. Love all the options/buttons: timer, ionizer, filter life, automatic option & lock. It seems to work beautifully. Is super quiet. And is rated fabulously. I, literally & figuratively, am breathing easier with this air purifier on & in my life.
My breathing has bee so much better since I received the unit.. My allergies are much better.. Not completely gone but so much more manageable. I'm so glad I found this product!