If I could give 0 stars I would. They WAY over charges for a new system, 3 units and new ducts. Charged me almost triple and at the time I did not know better and was desperate to have AC. That was in 2005. The Units have NEVER worked properly. I had to call them 3 months after the install because one if the units crapped out and they wanted to Charge me $150! 3 months after I spent 25k!! I ended up calling someone else who said they did not ground the wires properly or hook up the circuit board properly and that is why it kept shorting out. He fixed it for $75 including a new panel and I will never again call A-1. There are too many mediocre HVAC companies and a couple good ones to waste your time with one this bad.