Lochinvar has launched 20 commercial heat-pump water-heater models, ranging from 25,000 to 250,000 Btu per hour and with modular installation capabilities up to 2 million Btuh per hour. The product line gives specifying engineers, architects and plumbing contractors additional options to meet energy-savings and sustainability goals when bidding on large commercial properties. Heat-pump water heaters transfer heat instead of creating it. Unlike typical HVAC heat-pump systems, heat-pump water heaters provide hot water using atmospheric heat (air source) or geothermal/waste heat (water source). The air-source models cool and dehumidify the surrounding ambient air, cutting down on air-conditioning usage and costs. The watersource units absorb heat from water sources, including return chiller water, process and groundwater. Designed for indoor or outdoor use, heat-pump water heaters work in conjunction with storage tanks and can be tailored to meet specific application requirements.