50VL Performance™ 14 SEER Single-Packaged Air Conditioner System w/ Puron® (R-410A)Refrigerant Single and Three Phase 2 to 5 Nominal Tons (Sizes 018-060) STANDARD FEATURES Puron® refrigerant an environmentally friendly alternative 14.0-14.3 SEER and 12.0 EER at 95 F° OD Built-in Thermostatic Expansion Valve (TXV) improves overall efficiency Multi-speed, direct drive indoor blower is standard on all models Envirotuff™ rust-proof base with integrated drain Vertical condenser fan discharge Sound ratings as low as 71dBA Copper tube/aluminum fin condenser and evaporator coils UL and UL Canada certified Scroll compressors on all sizes Wire grille High and low pressure switches to protect compressor Filter drier to protect the refrigerant system Metal, insulated duct covers that remain in place for downshot applications