Intended for residential use, this Energy Star-listed heat-pump water heater features an integral 50-gallon tank. While not the highest-efficiency heat-pump water heater on the market, it is the first relatively affordable, integral storage offering from a large national company to enter the North American market. It is also the market’s quietest (rated at 49 dB), and has the longest warranty.
Rheem Manufacturing Company; Montgomery, AL. 334-260-1500; www.rheem.com