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From inside (document excerpt):
25HBB3 Base 13 Heat Pump with Puronr Refrigerant 1 1/2 to 5 Nominal Tons (Sizes 18 to 60) Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 13 SEER/ 10.1 – 10.8 EER/ 7.7 – 8.3 HSPF (nominal) S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 72 dBA S Sound levels as low as 70 dBA with accessory sound blanket Comfort S System supports Thermidistatt or standard thermostat controls Reliability S Puronr refrigerant – environmentally sound, won’t deplete the ozone layer and low lifetime service cost.
S Scroll compressor S Internal pressure relief valve S Internal thermal overload S High pressure switch S Loss of charge switch S Filter drier S Balanced refrigeration system for maximum reliability Durability the environmentally sound refrigerant WeatherArmort protection package: S Solid, durable sheet metal construction S Dense wire coil guard S Baked- powder paint -on Carrier heat pumps with Puronr refrigerant provide a collection of features unmatched by any other family of equipment. The 25HBB has been designed utilizing Carrier’s Puron refrigerant. The environmentally sound refrigerant allows consumers to make a responsible decision in the protection of the earth’s ozone layer. As an Energy Starr Partner, Carrier Corporation has determined that this product meets the Energy Starr guidelines for energy efficiency. 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. 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 2 N 5 3 A H Product Family H = RES HP 4 A B Tier B=Base 5 A/N B Major Series B = Puron 6 N 3 SEER 3=13 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. Product Series 25 = HP Cooling Capacity ISO 9001:2000 the environmentally sound refrigerant REGISTERED 25HBB3 This product has been designed and manufactured to meet Energy Star® criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to achieve rated capacity and efficiency. Installation of this product should follow all manufacturing refrigerant charging and air flow instructions.