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There are a number of advantages associated with installing an Air to Water Heat Pump for domestic as well as commercial applications, and I will endeavor to explain those advantages in this blog.
Some people are uncomfortable with the fact that Air to Water Heat Pumps use electricity for their operation.   Whilst this is correct, it is important to understand how much electricity is consumed to operate the Air to Water Heat Pump as well as understanding exactly what the electricity is expended on for the operation of the Air to Water Heat Pump.  A small amount of electricity is consumed to run the compressor and fan components in an Air to Water Heat Pump.  The amount is usually somewhere between 70% and 80% less than what would be consumed to heat a similar volume of hot water by a similar temperature rise in a conventional well insulated electric storage water heater.   The heating efficiency of an Air to Water Heat Pump is determined by the available ambient temperature of the air and the relative humidity of the region where the Air to Water Heat Pump is located.   Primarily, heat energy is extracted from the surrounding air by way of the evaporator that contains cool refrigerant gas where air is drawn through by the fan.  The vaporized gas is charged with considerably more heat energy when it then is compressed in the compressor which also uses electricity.  The super heated refrigerant vapor then dissipates the generated heat by way of a condenser or heat exchanger to the stored water that is required to be heated.

To obtain maximum benefit from the heat that is generated from the refrigerant gas in an Air to Water Heat Pump it is important to incorporate an efficient condenser of heat exchanger to transfer the generated heat to the water that is in the storage tank.  Some key elements of efficient transfer of heat are the surface area available for the heat transfer process and opposite directional flow between the water and the super heated refrigerant vapor.  Whilst Air to Water Heat Pumps are an ideal option for domestic applications, they are even more suited to Commercial applications, due to the Air to Water Heat Pumps ability to generate hot water efficiently 24 hours a day from the air.   Other energy efficient hot water appliances such as solar hot water systems are only able to generate free hot water during sunny periods, and definitely no solar contribution during the evening hours.   The other major benefit considerations that favor Air to Water Heat Pumps is the considerable reduction in installation space needed, as well as the significant reduction in installation costs, particularly when comparing installation costs associated with a solar hot water system.  For domestic applications the savings in energy use for an Air to Water Heat Pump when compared to a solar water heater is very similar over the course of a year, however, when selecting an Air to Water Heat Pump for Commercial applications no other hot water system can provide the same savings and installation cost savings as an Air to Water Heat Pump.

Posted By – Mel Peatey