We are in the process of completing a new home and we used City Heating and Air for some zoning and installation work. They have come several times to assist us and see if the the system is working to complete capacity, if it is large enough, and its efficiency. They have been very helpful, and have done a good job save for some issues. The heating and cooling system is uneven throughout the house. Some rooms are definitely hotter/cooler than others, and I would have liked them to all be on one thermometer. When we call about our issues they are pretty responsive. They come out and check on whatever it is that needs to be helped.