HVAC Rating System Jargons And Their Meaning

At Maddox, we want you to enjoy the comfort level you and your family deserve. When choosing your new HVAC system, you could get intimidated due to industry jargons like AFUE and BTU. And you’re wondering what those terms mean. Let’s go over the following HVAC rating system jargons and their meanings.


Seasonal Energy Efficiency Ratio (SEER) is the cooling output during an average cooling season divided by the total electric energy input during the same period. The higher the system’s SEER rating, the more energy efficient it is and the lower your energy cost.


Annual Fuel Utilization Efficiency (AFUE) measures the efficiency of your furnace when it comes to converting fuel into energy. The higher the unit’s AFUE, the more energy efficient it is. AFUE rating may not be available to units that are already more than 15 years old. Contact your local HVAC company for more information.


The Energy Efficiency Ratio (EER) of an air conditioning unit is measured by the output cooling divided by the total electrical power input. EER is ideally determined by a set indoor air temperature, a set outdoor temperature and 50 percent relative humidity.


One British Thermal Unit (BTU) is the amount of heat needed to lower or raise the temperature of 1-pound of water by 1-degree Fahrenheit. BTUs are often used in most AC units.


The Heating Seasonal Performance Factor (HSPF) measures the efficiency of your heat pump. It the ratio of the heat output to the total electrical energy used over a typical heating season. The higher the unit’s HSPF, the more energy efficient it is.

If you want to learn more about these HVAC ratings and know how they affect your comfort, contact Maddox Residential & Commercial Services.

Leave a Comment