(P) The most advanced PTAC ever. (/P) (P) Inverter compressor, award-winning and patented FreshAire (R) make-up air system to help achieve ASHRAE 62.1 standards, ultra-quiet operation with the highest STC ratings in the industry*, and optional FreshAire (R) IAQ accessories for healthy indoor air quality. FreshAire (R) PTAC is not just best in class, it's in a class of its own. (BR) *amongst PTACs with make-up air (/P)(BR) (BR)(B)Conditioned Fresh Air(/B)(BR) (P)Friedrich's FreshAire (R) PTAC system helps achieve ASHRAE 62.1-2013 requirements, and brings up to 52 CFM of conditioned, MERV 8 filtered, outside air into the space. Patents-pending technology uses the inverter compressor and main cooling system to optimize temperature and humidity level of incoming air.(/P) (BR)(B)Precision Inverter (R) Technology(/B)(BR) (P)Precision Inverter (R) variable speed compressors deliver efficiencies up to 13 EER and a 15 SEER equivalent. Compressors operate down to 20% of rated capacity, or up to