The Seasonal Energy Efficiency Ratio (SEER) indicates the cooling efficiency of air conditioner and heat pump systems. The higher the SEER number, the greater the efficiency and the greater the energy savings. All new products have a 13.0 SEER rating or better. At Carrier, we offer air conditioner and heat pump systems that can achieve SEER ratings of over 20.
Annual Fuel Utilization Efficiency (AFUE) tells you how much of the fuel consumed by your furnace is used to heat your home and how much is wasted. The higher the AFUE number, the greater the efficiency. For example, a 90% rating means that 90% of the heat a furnace creates is used directly by the home while 10% is lost (usually through venting).
Heating Seasonal Performance Factor (HSPF) measures the heating efficiency of heat pumps. The higher the number, the greater the efficiency and the greater the cost savings. Today’s heat pumps must have a minimum rating of 7.7 HSPF.
Energy Efficiency Rating (EER) measures cooling efficiency and is calculated by dividing a product’s BTU output by the watts of power it uses. Generally, higher is better. (Noticing a trend here?)
The Coefficient of Performance (COP) is used to measure certain heat pumps’ efficiencies while in heating mode. You’ll commonly see this measure applied to geothermal products. Like other efficiency ratings, higher is better.