A. O. Smith tankless water heater had ignition failure error codes and two leaks coming from the service valves. Due to the age of the unit, we decided that replacement was the best option. Installed new Navien NPE240A2 tankless water heater. We installed an outdoor vent kit as well as a pipe cover. All piping is insulated and we wrapped the inside of the cover in batter insulation. We installed a grundfos recirculation tee at a faucet on the second level of the home. All of the gas piping from the water heater to the gas meter were replaced with black iron and strapped to the wall. We painted all of the black iron to prevent rust and corrosion. Our electricians were out yesterday and they installed a waterproof outlet next to the unit. Thank you for choosing Te Certified!