59MN7B080C21--20
59 = Family
M = Modulating Gas Valve
N = Infinity Series
7 = +97% AFUE
B = Major Series
080 = 80000 BTU Heating Capacity
C = Communicating Variable Speed Constant Airflow ECM Motor
21 = 21" Casing Width
- = Voltage
- = Minor Series
20 = 2000 CFM

Standard Features

• Greenspeed^TM Intelligence adaptable speed technology (Requires Infinity^® User Interface)
• Fully modulating gas valve (40%-100% in 1% increments)
• Ideal Humidity^® regulates humidity based on outdoor temperature¹
• SmartEvap^TM dehumidification prevents condensate buildup on the coil¹
• ComfortFan^TM allows homeowner to select continuous fan speed¹
• Full-featured communicating variable speed ECM blower motor
• Variable speed inducer motor
• Self diagnostics through Infinity User Interface (sold separately)
• 4-way multipoise design with unique venting elbow
• Direct−vent/sealed combustion single−pipe venting or ventilated combustion air
• All sizes meet ENERGY STAR Version 4.1 criteria for gas furnaces: 95+ AFUE
• Convertible to propane with accessory kit
• Filter media cabinet included
• 10-year parts limited warranty²

¹Requires compatible thermostat¹See warranty certificate for details