I want to take a moment and let you know what a great product I think you have. I've spent 23 years as a HVAC tech and have never seen a product close to yours. As I am now a business owner of an Air Duct Cleaning company, I offer my customers clean air and a comfortable living space. I see many homes with problems due to improper ducting and without costly repair or replacement their options to solve these problems were limited. With the Fan Handler I can give them comfort without modifying or changing the ducts. This product virtually compensates for poor duct work in many cases. Plus after installing a high quality air filter the home owners benefit from being able to use it 100% of the time as the filter will only work when air is being moved across it. I love this product and so do my customers! Thanks again.