We replaced the AC unit and coil for our second story last week. RK Heating & Air were very professional and polite throughout the process. They even provided us with some very helpful advice in maintaining and keep our unit as durable as possible. They also explained to me how my new water safety switches work to prevent water damage. Overall a very good experience. Safe to say I no longer have to search for HVAC contractors. Thanks for the great work RK Heating & Air.