Glossary of Terms

AFUE Rating: Gas furnaces use Annual Fuel Utilization

Efficiency (AFUE) as their measurement. The higher the AFUE, the greater the efficiency and the greater your energy savings potential.

HSPF: Heat pumps use Heating Seasonal Performance Factor (HSPF) as their measurement of heating efficiency. The higher

the HSPF, the greater the efficiency

and the greater your energy savings potential.

SEER: SEER stands for Seasonal Energy Efficiency Ratio and applies to central air conditioners and heat pumps during cooling operation. The higher the SEER, the greater the energy economy.

EER: EER stands for the Energy Efficiency Ratio that calculates the efficiency provided by a central air conditioner or heat pump while cooling at a specific oudoor temperature. It can be found by dividing a unit’s Btu output by its wattage.

ENERGY STAR: ENERGY STARqualified earn the U.S. government’s designation

for superior energy efficiency to help save costs on energy bills.

Decibel (db): Unit used to measure sound level by comparing it with a given level

on a logarithmic scale.