T.F.
We use Collin Air in Plano. ###-###-#### I believe the website is www.collinairconditioning.com , however I am not exact on that part.
Brian and his team are fair, on time, and reliable. They are very good and knowledgeable at what they do.
We built our home in 2000 and we hated the builder quality units so about 4-5 yrs ago, we completely ripped out everything the builder did, wiring, units, furnace, etc and Brian and his team came in and upgraded everything for us.
He was very fair on pricing as well. Remember, who ever you choose.....the quality of work that the person does makes the difference on how well your units work and how efficient they are.
Good luck