Richair installed two dual system compressors with 5 air handlers on 2 stories of our private home several years ago. They recently had an offer to have the air handlers cleaned and the compressors checked, which I accepted. Thery arrived on time, were very polite, efficient and thorough, identifying a buldup of dust on the blower wheel of two of the air handlers. Although this was not covered under the offer, they instructed me on the proper filter cleaning schedule and how to do it. They also offered to come back to clean the blower wheels for an additional fee but also offered to explain how to do it myself, which I latter did. I have only had good experiances with this company and all of their staff.