When the thermostat senses this need for heat, a fan and the compressor for the unit is energized. The fan moves air over a coil that is similar to the radiator on an automobile. The coil contains refrigerant which is at a lower temperature than the air moving across the coil. This allows heat to be transferred from the air to the refrigerant. The compressor pumps the refrigerant from the evaporator coil and raises it's pressure and temperature. The refrigerant is then circulated through another coil called a condenser that is located inside the storage tank. Since the water in the storage tank is at a lower temperature than the refrigerant, heat is transferred from the refrigerant to the water in the tank. The process is repeated very quickly until the thermostat senses that the water temperature is sufficient.

     Why have a heat pump water heater?

In general, it is way more efficient to move heat than it is to create heat such as with a conventional storage type water heater. The typical unit can provide energy savings of up to 50%. A standard water heater has an efficiency factor of .4 to 1 while these units typically have a rating of 2 or above.

The units are available in stand alone models or as retrofit units to be added to existing electric storage type water heaters.

Our brand ratings will be a valuable tool to help you in selecting the right unit for your home or business.