Architectural Product Reports - Top Ten Green Products for 2009

Quote from Architectural Product Reports:

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.