We went with Poston Brothers to have our Furnace and A/C replaced after receiving an $18,000 quote from Help heating and plumbing which I found to be crazy. Poston gave us a quote of around $8,000, and the sales rep Jeff was quick to return emails and phone calls. When I asked for equipment to be upgraded in the quote he would have that sent back to me with in an hour.
Our installers were Jon and Marcel and they were extremely polite and professional. This was a 2 day job and they stayed late on Tuesday to insure we had heat over night. I would highly recommend them for your install needs.