Quieter than any other cooling system Lennox’ patented SilentComfort™ technology and unique design make the SL18XC1 the quietest single-stage air conditioner you can buy.* Efficiency makes an impact on your utility bills As the most efficient single-stage air conditioner you can buy,* the SL18XC1 minimizes energy usage to help the environment. Plus, efficiency ratings of up to 18.50 SEER can help lower energy bills. Those savings can add up to hundreds of dollars over five years.
SEER stands for “Seasonal Energy Efficiency Ratio” and is a measure of the cooling efficiency of air conditioners. The higher the SEER, the greater your energy savings. Typical SEER ratings start at 13.00, but the SL18XC1 carries ratings as high as 18.50.