Efficiency: SmartComfort® air conditioners and heat pumps offer a range of impressive SEER (seasonal energy efficiency ratio) ratings that reach as high as 15 SEER to help save energy and reduce utility bills. Smart Design: Microtube coil technology saves space and provides lasting comfort. The dense coil guard cuts routine maintenance time, making the unit easier to clean and service. Corrosion-Resistant Construction: The durable galvanized steel cabinet stands up to the elements, and the wire grille optimizes airflow while protecting the coils. Enhanced Warranty: All SmartComfort® HVAC equipment includes a 5-year manufacturer’s parts limited warranty or a 10-year manufacturer’s extended parts limited warranty when registered within 90 days.