The most common measurement used to heat qualifications pump efficiency is the coefficient of performance. This refers to the output ratio of the heat pump BTU to BTU output power. A ground water source or heat pump has a rating of three to five. An air source heat pump usually has a rating of the CP of two to four. Therefore, when comparing these ratings, make sure it is based on outside air temperature.
Another method to determine the efficiency of the heat pump is the energy efficiency ratio or EER. This evaluates the efficiency during the cooling cycle of the particular unit. This classification is also used for air conditioners. If the EER rating is greater than ten, then that is a good machine.
Note that these measures of efficiency heat pumps are basically the plant or laboratory tests. The heat pump in question might actually have a different measure in actual use. Measurement may vary depending on the weather or the amount of additional heat. Therefore, the measurement is better or more realistic calculations based one season. The rankings of the season are HSPF and seer.
The Seasonal Performance Factor is HSPFs heating or other measurements of the efficiency of the heat pump. HSPF stands for Heating Season Performance Factor and is basically the SEER rating for winter. If the rating is five to seven, then that is a good qualification to have. SEER or Seasonal Energy Efficiency Ratio is a measure of total BTU cooling. A good SEER rating is between eight and ten.
Mini Split AC in the USA 