Art Almaraz has taken care of my central a/c and heating system since he installed it in 2006. He is professional, knowledgeable, and very careful in his work. I chose him to install my system because of several recommendations from friends in my community. Art and his crew lived up to the great things I had heard, and his price was great (a big factor in my decision to have him do the work, of course). I have been very pleased with the system and with Questaair's continued maintenance.