7PRODUCT FEATURES AND BENEFITS (52M)S Improved sound for quiet operationS Exceeds ARI (Air Conditioning and RefrigerationInstitute) minimum efficiency requirements withexceptional energy efficiency ratios (EERs)S Easy to operate digital keypadS Easy to see electronic displayS Wall thermostat interface standardS Energy Management interface standardS Easy configuration for most applicationsS Enhanced temperature and humidity controlS Self check/Self Correct featuresS Improved condensate removal systemS Attractive, durable cabinet featuring new designS Chassis that easily retrofits to most majorcompetitors’ sleeves without use of retrofit kitS Low operating costsS No bulky duct systemS No seasonal changeoverQUIET OPERATIONOccupants and neighbors are protected against noiseintrusion. Indoor sound reduction is achievedthrough the units’ two--fan motor and tangential fandesign that provides a smooth, uniform air discharge.Outdoors, the rotary compressor provides quiet,reliable operation.MOST EFFICIENT PERFORMANCEHigh EERs provide excellent operating economy. Thesystem operates without bulky ductwork, separateequipment room, and complex match--up of differentcomponents. Heating and Cooling modes areavailable without seasonal changeover.EFFICIENT FAN MOTORAn efficient, totally enclosed PSC (permanent splitcapacitor) indoor fan motor provides a choice of high,medium or low speeds for heating and cooling. Afan--only setting provides air circulation. The fanmotors, both indoor and outdoor, require nomaintenance and no lubrication.52M