Heat Pump Hot Water
How they work
Heat pump water heaters (HPWHs) move heat from the surrounding air to heat water in a storage tank using a refrigeration cycle:1. Extract heat: A fan draws air into an evaporator, where a refrigerant turns into gas.2. Compress: A compressor pumps the gas through a valve, generating heat.3. Transfer heat: A heat exchanger moves the heat from the gas pipes to the water storage tank.4. Cool: The gas turns back into a liquid, flows into an expansion valve, and cools further.5. Repeat: The liquid returns to the evaporator to repeat the cycle.
HPWHs are also known as "air-source heat pumps" are more energy efficient than traditional electric water heaters, typically using 60–75% less electricity. They can also switch to electric resistance heat when there's high demand for hot water. HPWHs come with control panels that allow you to select different operating modes, such as:
Efficiency/Economy:
Maximizes energy efficiency and savings.
Auto/Hybrid
The default setting for daily use.
Electric/Heater
The least energy-efficient setting, using only the electric element to heat water.
Vacation & Timer
Saves energy when you're away from home.
Things to Consider
There are many Heat Pumps available on the market. To check how efficient a Heat Pump is you can ask for the CoP rating. This is the Coefficient of Performance and is a performance rating on how effective a system is at transfering heat versus the amount of electrical power it consumes. The higher the CoP the better.
Heat Pumps are the same as most products. If they're being offered at cheap prices then chances are you will get what you paid for.
Please also take into consideration that if you apply for a Solar Vic Rebate on a dodgy Heat Pump, you willl not be able to claim it again if you have to replace the Heat Pump.
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