We got this unit to clean the air in the upstairs of our old farm house, since it had a bit of an "old home" odor. We are all sensitive to toxic chemicals and off-gassing smells. When I opened the box, I was overtaken by the toxic gasses that came out of the box. I should have just packed it right back up and sent it back, but instead, I let it sit in our greenhouse for three weeks to "gas out". When I finally brought it into the house and plugged it in, it made the whole upstairs smell like a nasty chemical smell. I don't have the receipt or any packaging left and am just sucking up the several hundred dollar loss. I really don't understand that a product that is supposed to CLEAN AND PURIFY the air in ones home is being made out of plastics that gas out such nasty chemical into the air. This purchase makes me sick, literally!!!