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From inside (document excerpt):
25HBR3 BasetSeries 13 Heat Pump Sizes 18 To 60 1 1/2 to 5 Nominal Tons Product Data INDUSTRY LEADING FEATURES / BENEFITS Efficiency S 13 SEER/ 11 EER / Up to 8.6 HSPF (Nominal) S Microtube Technologyt refrigeration system S Indoor air quality accessories available Sound S Sound level as low as 75 dBA Comfort S System supports Thermidistatt or standard thermostat controls Reliability S Front–seating service valves S Scroll compressor S Filter drier S Loss of charge pressure switch S Balanced refrigeration system for maximum reliability Durability WeatherArmort protection package: Shown with optional dense coil guard S Solid, Durable sheet metal construction S Wire coil guard S Baked–on, complete coverage, powder paint Applications S Long–line — up to 250 feet total equivalent length, up to 200 feet condenser above evaporator, or up to 80 ft.
evaporator above condenser (See Longline Guide for more information.) S Low ambient (down to –20_F) with accessory kit Warranty Single Phase 5 year limited parts warranty Three Phase S 5 year limited compressor warranty 5 year limited compressor warranty 1 year limited parts warranty 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 R Major Series R = R 22 6 N 3 SEER 3=13 SEER 7 N 3 8 N 6 9 A/N A Grille Variations A = Standard G = Dense Coil Guard 10 A/N 0 Open 0=Not Defined 11 A/N 0 Open 0=Not Defined 12 N 3 Voltage 3=208/230 1 5=208/230 3 6=460/3 13 N 0 Series 0= Original Series Product Series 25 = HP Cooling Capacity ISO 9001:2000 REGISTERED 25HBR3 As an Energy Star® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency. Refer to the combination ratings in Product Data for system combinations that meet Energy Star guidelines. STANDARD FEATURES Feature 13 SEER Scroll Compressor Wire Coil Guard Field Installed Filter Drier Front Seating Service Valves Internal Pressure Relief Valve Internal Thermal Overload Long Line capability Low Ambient capability with Kit Loss of Charge Pressure Switch PHYSICAL DATA UNIT SIZE SERIES Operating Weight (lb) Shipping Weight (lb) Compressor Type REFRIGERANT Control Charge (lb) COND FAN Air Discharge Air Qty (CFM) Motor HP Motor RPM COND COIL