A quality piece of equipment. Used in one house after I burned a burrito to a crisp in microwave and in another house for musty, closed up cabin smell. Once I cleaned all surfaces, I plugged this unit in and let it go for a week straight. Most of the smoke smell is gone and the musty smell is no more. The unit seems more delicate than I expected. Be careful as it tips easily. I wouldn’t stack units as pictured in listing. Also, the UV light is very delicate and is easily broken. I wish I’d ordered without the light. Still happy with purchase. Great value.