Packaged System 13 SEER Heat Pumps, Air Conditioners And Gas/Electric Systems What does having a 13 SEER Package System mean? Your packaged system’s cooling efficiency is measured by Seasonal Energy Efficiency Rating (SEER). The higher the SEER rating the more efficiently your unit operates. Increased efficiency translates into savings in utility costs. Annual savings based on 36,000 BTU unit, 1500 cooling load hours, and .08/kwh. Actual savings may vary depending on climate conditions, energy rates and patterns of usage. |  |  Environmentally friendly R-410A refrigerant is non-ozone depleting . |