Horrible!!!!
I switched over to Smartair when numerous other filters from my previous brand would let off a horrid smell within weeks! To my complete surprise, after receiving the Squair product the filter does the exact same as their competitors but within just two days! it stinks exactly like my other brand filters! all these companies are the same, using cheap toxic filters from China, there is absolutely no difference except designs and pricing....the delivery took over a week which is ridiculous in the US and to make matters worse it is sold through a fraudulent website! SmarterHepa.com does NOT have a working email or phone number so I now have to file a chargeback with my credit card company! Beware and do NOT order anything from this company!