Infinity Series Heat Pump 25HNB9

Infinity Series

The Carrier Infinity® 19 Series Two-Stage Heat Pump, with Puron® refrigerant, Model 25HNB9, is available in 3 to 5 ton nominal-sized units.

Energy Efficiency

  • 14 - 19 SEER / 10.7 - 13.7 EER / 8.2 - 10.0 HSPF
  • Microtube Technology™ refrigeration system
  • Indoor air quality accessories available


  • Sound level as low as 65 dBA
  • Quiet mount split post compressor grommets
  • Forward-swept condenser fan blade
  • Compressor sound hood
  • Laminated steel compressor mounting plate
  • Electronic ECM ball bearing outdoor condenser fan motor

WeatherArmor Protection Package

  • Solid, durable sheet metal construction
  • Baked-on, complete outer coverage, powder paint
  • Louver coil guard


  • System support Infinity Control or standard 2-stage thermostat controls


  • Crankcase Heater Standard
  • Puron® refrigerant
  • Front-seating service valves
  • Filter Drier
  • 2-stage scroll compressor
  • High-Pressure Switch
  • Internal thermal overload
  • Loss of charge switch
  • Internal pressure relief valve
  • Balanced refrigeration system for maximum reliability

Controls and Diagnostics

  • Infinity Control or Thermostat
  • Utility Interface Connection
  • Up to 83 point diagnostic capability with Infinity Control


  • Long-line - up to 250 ft (76.2 m) total equivalent length, up to 200 ft (60.96 m) condenser above evaporator, or up to 80 ft (24.38 m) evaporator above condenser (See Longline Guide for more information)

To the original owner, the Carrier® Infinity series two-stage heat pump is covered by a 10-year parts limited warranty upon timely registration of your new equipment. Ask your Carrier dealer about optional labor warranties. Warranty period is five years if not registered within 90 days. Jurisdictions where warranty restrictions are not allowed will automatically receive a 10-year parts warranty. See warranty certificate at for complete details.


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