There a quite a few heat pump water heaters on the market today, including the GE GeoSpring, Rheem Voltex, AO Smith PHPT-80, and the Stiebel Eltron Accelera 300. See why Matt Risinger thinks the AirTap ATI66 is the best model for the hot/humid Southern U.S. In this video, Risinger gives us all the information needed about the ATI66 AirTap. This heat pump water review will review the many reasons why heat pump water heaters are energy efficient, cost efficient and provide the extra benefits you can get by keeping one in a utility space. The ATI66 Airtap offers high performance, from its ducting systems, the extra gallons it can store as opposed to the original unit, the Panasonic compressor that lays on the inside and the stainless steel tank that gives it long-lasting life. Risinger reveals that this product can keep money in your pockets and provide overall benefits to water heating in your house.