A. O. Smith Infographic Explains Heat Pump Water Heaters by Highlighting New Energy-Efficient Voltex® Hybrid Electric Water Heater ASHLAND CITY, Tenn. (Jan. 28, 2014) – Leading water heater manufacturer A. O. Smith (www.hotwater.com) has released an infographic showing how heat pump water heaters achieve such high-energy efficiency. The A. O. Smith graphic demystifies the inner Read more