What SEER Rating Should Your AC Have in Illinois?

With Illinois summers bringing stretches of high heat and humidity, selecting the right air conditioner efficiency matters. One of the most important specs to compare is SEER, or Seasonal Energy Efficiency Ratio, which measures how efficiently an AC uses electricity across a cooling season.

While minimum requirements vary by product type and installation timing, today’s market generally makes it easy to find options spanning from basic models to high-efficiency units. The best SEER rating for you depends on your comfort goals, how long your system runs, and how you plan to use the home.