EER2 is a standardized measurement of how efficiently an air conditioner performs during peak load (high heat) conditions. Unlike SEER2, which measures efficiency over a whole season, EER2 tells you how much power the unit uses when it is working at its hardest. High EER2 ratings are particularly important for our customers in hot climates like Texas and Florida. You can find these ratings in the technical data sheets for all our products. Choosing a unit with a high EER2 ensures that your energy bills won't skyrocket during a record-breaking heatwave. It is a key metric for homeowners focused on long-term utility savings.