HVAC Contractor Practice Exam

The Seasonal Energy Efficiency Ratio (SEER) is a measure of energy efficiency for air conditioning systems. It calculates the total cooling output during a typical cooling season divided by the total electric energy input during that same period. A higher SEER rating indicates that the air conditioner is more efficient, thus consuming less energy for the same amount of cooling output.

In recent years, the range for SEER ratings has evolved, with modern systems typically having ratings that fall between 13 and 21. The minimum SEER rating for new residential air conditioning systems has been set to 14 in many regions, mainly to encourage more efficient cooling systems and reduce energy consumption and greenhouse gas emissions. Systems achieving SEER ratings of 21 or higher are considered high efficiency and are designed to operate with even greater energy savings.

Therefore, the range of 13 to 21 encompasses the commonly available and efficient models currently on the market, making it the correct choice. This range reflects advancements in technology and regulatory changes aimed at improving energy efficiency standards in HVAC systems.