Absolute liars. Their field supervisor, Chris, came to our home to evaluate if we needed a new unit. He scared us, telling us we had mold coming into our home through our a/c unit. He told us our gas furnace was rusted through and had the potential to lead carbon monoxide into our home. We panicked and signed on the dotted line to replace our entire system... he told us our duct work was shot and we needed everything replaced. After we signed, we got 3 other opinions from professionals. All three showed us pictures. No mold, no area rusted through, our duct work was fine. Precision Air tech terrified us in order to get a sale. When we called to cancel, they tried to charge us a 20% restock fee which was about $2,200.00. What a joke. We now have a lawyer. Do not ever deal with these crooks. Total fraud.