What does "SEER" measure in heat pump systems?

SEER, or Seasonal Energy Efficiency Ratio, is a critical metric used to evaluate the efficiency of heat pump systems, particularly for cooling. It represents the ratio of the cooling output (in BTUs) to the energy consumed (in watt-hours) during a typical cooling season. This ratio provides a way to assess how effectively a heat pump converts energy into cooling, taking seasonal variations into account. A higher SEER value indicates a more efficient heat pump, which can lead to lower energy costs and a reduced environmental impact.

In the context of heat pump systems, understanding SEER is essential because it helps consumers make informed decisions when selecting equipment based on energy efficiency. This parameter is especially relevant in regions where cooling demand varies seasonally, hence emphasizing the importance of the term "seasonal" in its definition.