Copper heat exchanger - 25x better heat transfer than stainless steel thus stabilizing outgoing water temperature quicker and reducing pressure drop across the heat exchanger
Field convertible from natural gas to propane - easily convertible from natural gas to propane with supplied kit
Safety features - built-in freeze protection, manual reset hi limit, overheat cutoff fuse, inlet and outlet thermistors for constant temperature monitoring
Venting and combustion - direct vent APNC35 concentric vent system, vertical or horizontal vent termination installation, power direct vent, electronic ignition - no pilot light