A heat pump water heater is a by product of the technology used for space heating. It works on the simple procedure of extraction of heat from the air and then using it for the heating of water. The air can be indoors, outdoors, or from any hot exhaust. This provides cooling of the air from which the heat is removed. Our heat pump water heater review shows that by this method of extracting heat from the air that surrounds the space for the heating of water, there is a sizable saving in terms of money. This is because of the fact that the heat extracted from the air will be about 2 times the heat that should be obtained if a resistance water heater is used.  

Our heat pump water heater review significantly points out that when heat is extracted from the air for the heating of water you get the benefit of space cooling. This is very much like the functioning of an ordinary air conditioner in which heat from the circulating hot air is absorbed by the cool refrigerant enabling you to get cool air. However, in the case of the heat pump water heater which absorbs heat from an exhaust source, no space cooling is achieved. Some models of these water heaters come as a complete package including a tank and backup resistance heating elements. If the climate is moderate, as per our heat pump water heater review, garages outdoor air etc. could be used to obtain the necessary heat to operate the heat pump. This is a variation of normal super heater water heating.

The type of water heater is a part of the integrated package of a heat pump water heater or air-conditioning system. In such a situation, water heating by the heat pump occurs when the air-conditioning system is on and at other times electric resistance heating takes over. During cool seasons, our heat pump water heater review has found that the variant heater improves the efficiency of the air-conditioning and at the same time contributes to the heating of the air at no extra cost.  As per an estimate of our heat pump water heater review, about 20% to 40% of the heat requirement for water heating is contributed by the variant heater.

Saving of energy is the main reason for using a heat pump water heater. It is mainly recommended for buildings requiring large quantities of hot water and also those with a steady need for air-conditioning as in warm climates. It is also recommended where the tariff for electricity is very high.  Heating coefficient of performance (COP) or EF are the 2 terms used to assess the performances of a heat pump water heater.  There is no standard fixed for the performance figures. It has been found that these heaters operate at an EF of 2 to 2.5.

Several brands are available in the market. Our heat pump water heater review has noted that the addition of new variant heater to air conditioning units have grown in popularity to the disadvantage of the primary equipment. Maintenance is minor, requiring mainly change of heaters. The technology is complex and repairs are costly.