Green Star Water Heaters and Retrofit Units

Credit: USI Green Energy, LLC

What makes this product green?

  • Energy-conserving equipment


USI’s Green Star hybrid heat pump water heaters, available in 50-gallon and 65-gallon models, heat water to 135°F using a combination of heat pumpHeating and cooling system in which specialized refrigerant fluid in a sealed system is alternately evaporated and condensed, changing its state from liquid to vapor by altering its pressure; this phase change allows heat to be transferred into or out of the house. See air-source heat pump and ground-source heat pump. technology and an electrical heating element. With an energy factor(EF). Efficiency measure for rating the energy performance of dishwashers, clothes washers, water heaters, and certain other appliances. The higher the energy factor, the greater the efficiency. In some appliances EF reflects the percentage of energy going into the appliance that is turned into useful energy. of 2.4, the 50-gallon delivers a first hour rating of 63 gallons, and the 65-gallon a rating of 75. Green Star water heaters carry a 10-year limited warranty. USI also manufactures heat pump retrofits, which mount above a standard water tank to replace its fuel-burning heater. Performing with an energy factor of 2.11, Green Star retrofits carry a 6-year limited warranty.

Additional Info


  • Energy Star - Heat Pump Water Heaters

Manufacturer Information

USI Green Energy, LLC
960 Bridle Path Rd
Allentown, PA 18103
Phone: (610) 439-2122
Fax: (610) 439-8242

Listed in: Heat-Pump Water Heaters