Infinity™ 15 Packaged Air Conditioner with Puron® Refrigerant(R-410A) 2 - 5 Nominal tons STANDARD FEATURES System compatible with Infinity™ Controls only Puron® refrigerant, the environmentally sound refrigerant Up to 15.5 SEER, and up to 12 EER at 95ºF OD Built-in Thermostatic Expansion Valve (TXV) improves overall efficiency Variable-speed, direct-drive indoor blower is standard on all models Two-stage Scroll Compressors Envirotuff™ rust-proof base with integrated drain Listed by UL and UL-Canada and all sizes Energy Star ® approved Vertical condenser fan discharge Three panel access for ease of installation and serviceability Sound ratings as low as 75 dBA Crankcase heater standard on all models Copper tube/aluminum fin Condenser and Evaporator Coils Easily converts to down discharge Filter Drier to protect the refrigerant system Louvered Grille for added protection High- and Low-Pressure Switches to protect Compressor Metal, insulated duct covers remain in place for downshot applications Approved for low-ambient operation down to 0°F (low-ambient cooling must be enabled in the UI setup)