The KNIGHT wall-mounted heating boiler is designed to enhance installation flexibility, while still offering all of the features and benefits of the floor-standing model, such as the Smart System operating control with a user-friendly interface. Standard control features include outdoor reset with sensor, three-pump control, night setback and password security. Optional software for a PC or Pocket PC is available. It also permits intake and vent runs up to 40 feet using two-inch pipe. The intake and exhaust runs can terminate horizontally through a sidewall or vertically through the roof. Energy Star-qualified.