What aspect of energy efficiency do SEER and AFUE primarily assess?

The correct answer focuses on the efficiency of HVAC systems, which is evaluated through specific metrics such as SEER (Seasonal Energy Efficiency Ratio) and AFUE (Annual Fuel Utilization Efficiency).

SEER measures the cooling efficiency of air conditioning systems over a typical cooling season, allowing homeowners to understand how effectively their air conditioning units convert electricity into cooling output. A higher SEER rating indicates better energy efficiency, meaning less energy is consumed for the same amount of cooling.

AFUE, on the other hand, assesses the efficiency of heating systems, particularly those that use fuel such as natural gas, oil, or propane. It represents the ratio of heat output to the total energy input over a year's operation. A higher AFUE rating indicates that a greater percentage of the fuel is converted into heat for the home, making it a crucial measure of efficiency in heating systems.

Together, SEER and AFUE provide valuable insights into the performance and energy consumption of HVAC systems, allowing homeowners to make informed decisions about their heating and cooling choices.