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From inside (document excerpt):
25HNB5 Infinityr 15 Heat Pump with Puronr Refrigerant 1 1/2 to 5 Nominal Tons (Sizes 18 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 15.3 SEER (nominal) / 11.0– 13.0 EER / 7.7 — 8.0 HSPF S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 68 dBA S Compressor sound blanket standard S Quiet shift defrost 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.
Carrier’s heat pumps with Puronr refrigerant provide a collection of features unmatched by any other family of equipment. The 25HNB5 has been designed utilizing Carrier’s Puronr refrigerant. The environmentally sound refrigerant allows consumers 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 pressure switches S Loss–of–charge switch 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 evaporator, or up to 80 ft. (24.38 m) evaporator above condenser (See Longline Guide for more information.) S Low ambient (down to -20_F/-28.9_C)) with accessory kit MODEL NUMBER NOMENCLATURE 1 N 2 Product Series 25 = HP 2 N 5 3 A H Product Family H = RES HP 4 A N Tier n= infinity Series 5 A/N B Major Series B= Puron 6 N 5 SEER 5=15 SEER 7 N 3 8 N 6 9 A/N A Variations A = Standard 10 A/N 0 Open 0=Not Defined 11 A/N 0 Open 0=Not Defined 12 N 3 Voltage 3=208/230 1 13 N 0 Minor Series 0, 1, 2. Cooling Capacity the environmentally sound refrigerant Use of the AHRI Certified TM Mark indicates a manufacturer’s participation in the program For verification of certification for individual products, go to www.ahridirectory.org. Ready for use in a Hybrid Heatr Duel Fuel system. This product has been designed and manufactured to meet Energy Star criteria for energy efficiency when matched with appropriate coil components.