SEER rating stands for Seasonal Energy Efficiency Ratio and measures the energy efficiency of cooling systems. Basically, the higher the seer rating, the more proficiently your AC or heat pump unit can cool your home. This is important not only for keeping your home comfortable, but it also can have a significant impact on your energy bills. In fact, the Inflation Reduction Act mandated higher minimum SEER ratings for qualifying AC and heat pump units in order to decrease energy consumption and costs.