Which factor does the SEER rating primarily reflect?

The SEER rating, or Seasonal Energy Efficiency Ratio, specifically measures the efficiency of an air conditioning system over an entire cooling season. It is calculated by taking the total cooling output (in BTUs) divided by the total energy consumed (in watt-hours) during the same period. A higher SEER rating indicates a more efficient system, as it provides more cooling per unit of energy consumed. This efficiency is crucial for homeowners and businesses looking to reduce energy costs and environmental impact.

Other factors, such as the longevity of the system or its cost of installation, do not directly influence the SEER rating. While comfort level during operation can be impacted by system efficiency, the SEER rating itself is strictly a measure of how effectively an air conditioning unit uses energy to produce cooling. Thus, understanding SEER ratings allows consumers to make informed decisions when selecting an air conditioning system based on efficiency and potential cost savings over time.