The Lochinvar Knight Wall Mount Boiler is available from 50,000 to 210,000 Btu/hr input. This fully modulating, high-efficiency condensing boiler has efficiencies up to 96 percent AFUE, and is Energy Star® qualified. The residential heating boiler is designed for traditional hydronic space heating or radiant floor heating applications, and the compact, wall mount models are designed to enhance installation flexibility, while still offering all of the features and benefits of the floor standing models. The sealed-combustion direct-vent design on models WB050 – WB105, provides flexibility for placement within a building, permitting air intake and exhaust runs up to 60 feet using two-inch PVC or CPVC pipe. The intake and exhaust runs can terminate horizontally through a sidewall or vertically through the roof. The system also offers Lochinvar's exclusive 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 offers is available as well.