Heat Pumps ေရအပူေပးစက္
Heat pump is not heating the water with direct electricity, but using the electricity under more efficiency way.Heat pump’s efficiency is evaluated by COP value, it is the ratio of heating power output and heating power input, the COP value is changing and depended on the heat pump type, operating condition and etc. i.e. COP=3, it indicate 1kwh power can generate 3kwh power to heat the water. And the extra 2kwh is for free.