Heinz and Jim came out too Cochrane to replace a hot water heater. We did demolition of the tank and line as well as the gas line. After that, we installed the wall mounted navian system onto the wall and hook up the hot and cold we, hooked up the gas line and check for leaks and found none. Tested the system, everything checked out clear. Customer is super happy with his system and is happy to fill out our 5 star review. 5 year warranty on parts 10 year warranty.