
Cooling efficiency is measured in SEER (Seasonal Energy Efficiency Ratio). Ratings works like gas mileage on your car. The higher the SEER or HSPF number, the higher the efficiency and the greater the energy savings.
For instance, if your old unit is 10 to 15 years old, the efficiency rating could be a wasteful 6 SEER. Now, air conditioning systems can rate between 13 - 20 SEER. This means more savings over the long term in your pocket