From inside (document excerpt):
24ANB6 Infinityr Air Conditioner with Puronr Refrigerant 1 1/2 to 5 Nominal Tons (Size 18 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 14 — 16 SEER / 11.0– 13.5 EER S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 66 dBA S Compressor sound blanket standard Comfort S System supports Infinity Control or standard thermostat controls Reliability S Puronr refrigerant — environmentally sound, won’t deplete the ozone layer and low lifetime servce cost.
the environmentally sound refrigerant Carrier’s Air Conditioners with Puron r refrigerant provide a collection of features unmatched by any other family of equipment. The 24ANB6 has been designed utilizing Carrier’s Puron refrigerant. The environmentally sound refrigerant allows you to make a responsible decision in the protection of the earth’s ozone layer. This product has been designed and manufactured to meet Energy Starr criteria for energy efficiency when matched with appropriate coil components. Refer to the combination ratings in the Product Data for system combinations that meet Energy Starr guidelines. NOTE: Ratings contained in this document are subject to change at any time. Always refer to the AHRI directory (www.ahridirectory.org) for the most up- -date ratings -toinformation. S Scroll compressor S Internal pressure relief valve S Internal thermal overload S Filter drier S High and low pressure switches S Balanced refrigeration system for maximum reliability Durability WeatherArmort protection package: S Solid, durable sheet metal construction S Louvered coil guard S Baked–on, complete outer coverage, powder paint Applications S Long–line — up to 250 feet (76.20 m) total equivalent length, up to 200 feet (60.96 m) condenser above evaporato