Which measurement relates to the efficiency of HVAC systems?

The measurement that specifically relates to the efficiency of HVAC systems is SEER. SEER stands for Seasonal Energy Efficiency Ratio, and it is used to gauge the cooling efficiency of air conditioning systems. This metric indicates how much cooling a system provides per unit of electricity consumed over an entire cooling season. A higher SEER rating means that the HVAC system is more energy-efficient, leading to lower utility bills and reduced environmental impact.

In contrast, U-Value assesses the thermal performance of building components (like windows and walls), while R-Value measures insulation effectiveness, indicating how well a material resists heat flow. Air infiltration relates to the unintentional movement of air in and out of buildings and is important for overall building efficiency, but it does not directly measure HVAC system efficiency. Thus, SEER is the most relevant measure for evaluating HVAC efficiency in this context.