I've used Dwyer exclusively since 1994 when they installed central air conditioing in my 1948-era Cape Cod style home. They provided timely and superb quality workmanship -- the system is still functioning due in part to the quality craftsmenship during the installation and annual maintenance performed by Dwyer. Dwyer also installed my new furnace on 2005, which is still supurbly maintained by Dwyer. They will alwys be at the top of my list for service. Good job, Dwyer.