Noise Level - A noise level of 47 dB(A) was measured at 1 m from the water heater during a Noise Test
conducted to Standard GB/T 23137-2008 in a hemi-anechoic chamber of a test laboratory. The noise level
when installed may be higher due to sound reflections from adjacent walls and structures.
COP – The Coefficient of Performance for a heat pump is the ratio of how much useful heat it produces for
water heating to the power input into the water heater. The higher the COP number, the more efficient the heat
pump is. The actual COP of the product at any given time will be impacted by a number of factors, including
the ambient air and cold-water inlet temperatures at the place of installation and time of day / season of
operation.
A Coefficient of Performance (COP) of 4.4 was measured under test conditions with an ambient air temperature
of 19˚C/15˚C (Dry Bulb/Wet Bulb), heating of the water from 8˚C to 60˚C during water heater operation and a
power supply of 240 V~ 50 Hz. The Heat Pump average heating capacity in Watts (and converted to kilowatts
– kW) and its water heating capacity in Litres / hour were calculated from the results of this test.
Ambient Air Temperature & Humidity – The performance of a Heat Pump changes with ambient air
temperature, humidity and incoming water temperature. The warmer the air temperature and the higher the
Relative Humidity and the cooler the water temperature, then the higher is the heating rate of the heat pump.
Performance specifications stated in relation to the heat pump are measured at predefined conditions during
its testing.
Average Heating Capacity kW – This is how much heating power is put into the water during the heating
cycle by the heat pump. It is expressed as an average due to the changes in heating power from the
refrigeration cycle as the water is being heated and its temperature increases during the heating cycle.
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