The AeroTherm heat-pump water heater from Bradford White Water Heaters uses both heat-pump technology and backup electric heating elements to heat water. This integrated system drives economical and efficient operation to provide considerable energy while greatly reducing the cost of water heating. During heat pump operation, a fan draws heat from the air into a compressor and evaporator to heat refrigerant. Once heated, the refrigerant travels through a coil that fully surrounds the water storage tank. It is Energy Star certified and eligible for most U.S. rebate programs and efficiencies up to 3.48 UEF. It has first-hour delivery ratings up to 87 gallons, ultraquiet operation and four different operating modes. It offers top water connections and convenient height and weight for quick and easy replacements and installations. 215-641-9400; www.bradfordwhite.com.