Energy Efficiency:    Up to 18.50 SEER Stages of Cooling:    Single-Stage Sound Rating:    As low as 65 dB SilentComfort™ Technology      Solar-Ready Design      ENERGY STAR® Certified      Environmentally Responsible:    R-410A refrigerant and Solar Ready Cabinet:    PermaGuard™ Cabinet and SmartHinge™ Louver Design On-board Diagnostics:    iComfort®-enabled technology