I had purchased a small home with extreme odors present. Painting, air out the home, replacing the flooring -- nothing would remove the smells. I reached out to Phil after finding his website, asking his opinion. He recommended the PureAir 1500, clearly stating the reasoning behind this. I purchased one of these units and within 3 weeks, my home smells clean and fresh. When I had an incident with the unit, he send me a new one immediately. The service from Phil has been simply outstanding. He responds to emails and questions immediately and follows up, adding a wonderful personal touch. Highly highly recommend!