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What is S.E.E.R.?

Updated: Feb 21, 2023


SEER stands for "Seasonally-adjusted Energy Efficiency Ratio," and is a metric used to rate the efficiency of air conditioning systems. It is calculated by dividing the total cooling output of a system over a typical cooling season by the total energy input during that same period. The higher the SEER rating, the more energy efficient the air conditioning system is considered to be. SEER ratings help consumers compare the energy efficiency of different air conditioning systems, and higher SEER ratings often translate into lower energy bills over the lifetime of the system.


In general, a higher SEER (Seasonal Energy Efficiency Ratio) rating for a heat pump indicates better energy efficiency, which can result in lower energy bills and a smaller environmental footprint. However, there are other factors to consider when choosing a heat pump, such as the climate in which it will be used, the size of the home, and the type of fuel used for heating. A heat pump with a higher SEER rating may have a higher upfront cost, so it's important to weigh the cost of the unit against the long-term savings in energy costs. Additionally, the SEER rating is just one factor to consider when choosing a heat pump, and other features, such as the Heating Seasonal Performance Factor (HSPF), should also be considered when evaluating the overall efficiency of a heat pump.


HSPF stands for "Heating Seasonal Performance Factor," and is a measure of the efficiency of a heat pump's heating mode. It is calculated by dividing the total heating output of a heat pump over a typical heating season by the total energy it consumes during that same period. The higher the HSPF rating, the more efficient the heat pump is considered to be in heating mode.


COP stands for "Coefficient of Performance," and is a measure of the heating or cooling efficiency of a heat pump or refrigeration system. It is calculated by dividing the heating or cooling output of the system by the energy input required to produce that output. The higher the COP, the more efficient the system is considered to be. COP is a more general measure of efficiency than SEER (Seasonal Energy Efficiency Ratio) or HSPF (Heating Seasonal Performance Factor), as it can be used to compare the energy efficiency of heating and cooling systems across a range of operating conditions. However, in practice, SEER and HSPF are more commonly used to evaluate the energy efficiency of air conditioning and heat pump systems, respectively.

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