Carrier Infinity Multipoise Furnace, 96% AFUE, 80,000 BTU, Two-Stage, Variable Speed, 115/1

  • Energy Star Rated
  • California Prop 65

The 59TN6B Multipoise Variable-Speed Condensing Gas Furnace features the two-stage Infinity® System. The Comfort Heat Technology® two-stage gas system is at the heart of the comfort, provided by this furnace, along with the Infinity variable-speed constant airflow ECM blower motor, and two-speed inducer motor. With an Annual Fuel Utilization Efficiency (AFUE) of up to 96.7%, the Infinity two-stage gas furnace provides exceptional savings when compared to a standard furnace. This Infinity Gas Furnace also features 4-way multipoise installation flexibility, and is available in five model sizes. The 59TN6B can be vented for direct vent/two-pipe, ventilated combustion air, or single-pipe applications. A Carrier Infinity Control and Infinity Air Conditioner or Heat Pump can be used to form a complete Infinity System. Low NOx units are designed for California installations and meet 40 ng/J NOx emissions. Can be installed in air quality management districts with a 40 ng/J NOx emissions requirement. All sizes are design certified in Canada.



• Communicating variable-speed, constant airflow (VCA) ECM blower motor for electrically efficient operation all year long in heating, cooling and continuous fan operation
• Two-speed inducer motor, and two-stage gas valve.
• Silicon Nitride Power Heat™ Hot Surface Igniter.
• Adjustable blower speed for cooling, continuous fan, and dehumidification.
• Intregral part of the Ideal HumiditySystem® Technology.
• ComfortFan™ technology allows control of continuous fan speed from a compatible thermostat.
• Aluminized-steel primary heat exchanger.
• Stainless-steel condensing secondary heat exchanger.
• External Media Filter Cabinet included.
• Fully-insulated casing including blower section.


• 4-way multipoise design for upflow, downflow or horizontal installation, with unique vent elbow and optional through-the-cabinet downflow venting capability.
• Ideal height 35-in. (889 mm) cabinet: short enough for taller coils, but still allows enough room for service.
• Direct-vent/sealed combustion, single-pipe venting or ventilated combustion air.


• Self-diagnostics and extended diagnostic data through the Advanced Product Monitor (APM) accessory or Infinity User Interface.
• Propane convertible with gas conversion accessory
• Convenient Air Purifier and Humidifier connections.
• Compatible with single- and multiple-zone Infinity systems.


• All sizes meet ENERGY STAR® Version 4.1 criteria for gas furnaces: 95%+ AFUE.
• Cabinet air leakage less than 2.0% at 1.0 in. W.C. and cabinet air leakage less than 1.4% at 0.5 in. W.C. when tested in accordance with ASHRAE standard 193.

Fuel Type Natural Gas (factory), Propane Gas
Stages Two Stage
Number of Burners 4
Maximum Pressure 13.6
Limit Control Range SPST
Ignition Type Silicon Nitride Hot Surface
Heat Exchanger Type Aluminized Steel Clamshell
Gas Connection Size 1/2" - NPT
CFM Heating 1240
CFM Cooling 1310
CFM 1400
BTU Output 78000
BTU Input 80000
Blower Wheel 11 X 8
Blower Speeds Communicating Variable Speed
Blower Motor Type Variable-Speed, Constant Airflow ECM
Blower Motor RPM 300
Blower Motor HP 1/2
FLA 8.5
Hertz 60
MCA 9.3
Phase 1
RLA 8.5
Voltage 115
Safety Standards
California Prop 65 Yes
Energy Star Rated Yes
ETL Certified No
ETL Listed No
Leed Certified No
Shipping Point 46231
UL Listed No
Weights and Dimensions
Operating Weight (lbs) 152.5
Exterior Dimensions (D) (inches) 29.500000
Exterior Dimensions (W) (inches) 17.500000
Exterior Dimensions (H) (inches) 35.000000
Shipping Weight (lbs) 240.000000
Tier Infinity