Accelera W300

Accelera  W300

Credit: Stiebel Eltron

What makes this product green?

  • Energy-conserving equipment


The German-made Stiebel Eltron Accelera 300 is an EnergyStar-listed heat-pump water heaterAn appliance that uses an air-source heat pump to heat domestic hot water. Most heat-pump water heaters include an insulated tank equipped with an electric resistance element to provide backup heat whenever hot water demand exceeds the capacity of the heat pump. Since heat-pump water heaters extract heat from the air, they lower the temperature and humidity of the room in which they are installed. for use in residential or light commercial applications. The Accelera 300 has an integral 80-gallon tank and provides an energy factor of 2.5. A 1.7 kW electric element provides supplemental heat under high-demand conditions. A drain removes condensate. The 74” tall, 26” diameter Accelera 300 uses non-ozone-depleting R 134a refrigerant, has a 6-year warranty, and is available through plumbing wholesalers.

Additional Info


  • Energy Star - Heat Pump Water Heaters

Manufacturer Information

Stiebel Eltron
17 West St.
West Hatfield, MA 01088
Phone: 413-247-3380
Toll-free: 800-582-8423

Listed in: Heat-Pump Water Heaters


Apr 12, 2012 5:24 AM ET

Response to David Taormina
by Martin Holladay

Look for my upcoming blog on this topic. It will be published tomorrow (Friday April 13, 2012).

Apr 11, 2012 7:33 PM ET

when do heat pump water heaters do they make sense?
by David Taormina

After reading all the talk about tankless vs. storage Im curious if anyone has strong opioins about these heat pump electric water heating tanks? I'm building a passive house in westchester, ny and having second thoughts about water heating system. After scraching solar thermal and tankless systems the arhcitect is leaning towards this heat pump option. We are not using any hot water for heating so its just domestic use. Having no experience with these kind of tanks I would love to see some comments about them. Thanks.