Carrier · Infinity 98 with Greenspeed (59MN7C) · Model
Carrier Infinity 98 59MN7C 120C24–22
The 59MN7C 120C24–22 is the largest modulating Infinity 98: input from 48,000 BTU/h minimum to 120,000 BTU/h maximum, 117,000 BTU/h maximum output, certified 97.2% AFUE upflow and horizontal, in a 24.5-inch cabinet with six burners. It is a specialist size for the largest houses.
Rating plate
- Model
- 59MN7C 120C24–22
- Input
- 48,000 – 120,000 BTU/h
- Output
- 47,000 – 117,000 BTU/h
- AFUE
- 97.2% upflow · 95% down/horiz
- Burner
- Modulating
- Blower
- ECM, constant airflow
- Fuel
- Natural gas / Propane
- Cabinet
- 35 × 24.5 × 29.5 in
- Canada
- Available in Canada
The top of the modulating family runs between 48,000 BTU/h minimum input (47,000 BTU/h output) and 120,000 BTU/h maximum input (117,000 BTU/h output), giving the widest absolute modulation range in Carrier's residential line. Carrier certifies 97.2% AFUE upflow and horizontal and 95.0% downflow for this size.
The 24.5-inch, 184 lb cabinet holds six burners and a 1 HP communicating constant-airflow blower reaching 2,170 CFM for cooling, and needs a mechanical room and a duct system built for it. The variable-speed inducer and modulating gas valve step together through the communicating Infinity control.
A 120,000 BTU/h-class modulating furnace serves genuinely large or poorly insulated houses; for everyone else it is an expensive way to oversize. Carrier's product data is explicit that excessive oversizing can shorten furnace and vent life. The size and control configuration follow a heat-loss calculation.
Specifications
From Carrier's published product data. Input and output are listed separately; AFUE depends on installation position.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, maximum heat | 120,000 BTU/h | |
| Input, intermediate heat | 78,000 BTU/h | |
| Input, minimum heat | 48,000 BTU/h | |
| Output | ||
| Output capacity, maximum heat | 117,000 BTU/h | Carrier product data; DOE test procedure, position dependent. |
| Output capacity, intermediate heat | 76,000 BTU/h | |
| Output capacity, minimum heat | 47,000 BTU/h | |
| Efficiency | ||
| AFUE, upflow / horizontal | 97.2 % | |
| AFUE, downflow | 95 % | |
| Airflow | ||
| Certified temperature rise, maximum heat | 45 – 75 °F (25 – 42 °C) | |
| Certified temperature rise, intermediate heat | 50 – 80 °F (28 – 44 °C) | |
| Certified temperature rise, minimum heat | 35 – 65 °F (19 – 36 °C) | |
| Airflow, maximum heat @ rated ESP | 1,735 CFM | |
| Airflow, intermediate heat @ rated ESP | 970 CFM | |
| Airflow, minimum heat @ rated ESP | 785 CFM | |
| Cooling airflow @ 0.5 in. w.c. | 2,170 CFM | |
| Cooling capacity match | 5.5 tons @ 400 CFM/ton; 6 tons @ 350 CFM/ton | |
| Blower motor | Communicating variable-speed, constant-airflow (VCA) ECM | Measures and holds the airflow the control requests. |
| Physical | ||
| Cabinet width | 24.5 in | 622 mm |
| Approximate shipping weight | 184 lb | 83.5 kg |
| Cabinet height | 35 in | 889 mm |
| Cabinet depth | 29.5 in | |
| Installation positions | Upflow, downflow, horizontal left, horizontal right | |
| Venting | ||
| Venting | Direct vent (2-pipe) or ventilated combustion air | Carrier product data lists direct-vent and ventilated-combustion-air applications for this family. |
| Electrical | ||
| Blower motor | 1 HP | |
| Maximum unit amps | 14.4 A | |
| Maximum fuse / breaker | 20 A | |
| Electrical supply | 115 V, 60 Hz, 1 phase (104 – 127 V) | |
| Controls | ||
| Burner staging | Modulating (variable-capacity gas valve) | |
| Other | ||
| Burners | 6 | |
| Inducer | Variable-speed | |
| Fuel | Natural gas; propane with gas conversion accessory | |
Filters, serial numbers and service parts
Filter
- Field-supplied filter; certified watt data uses Carrier media filter 325531-40
Components this family's service documentation covers
- Hot-surface ignitor
- Flame sensor
- Pressure switches
- Variable-speed inducer motor
- Condensate trap and drain components
- Constant-airflow ECM blower
- Modulating gas valve
- Control board
Service-parts list source: Components documented for service in 59MN7C product data and service literature.
Best for
- The largest detached houses and high-loss homes with verified capacity needs
- Communicating Infinity systems in houses whose ducts move 2,000+ CFM
- Buyers who want the widest modulating range Carrier offers in a gas furnace
Compatible controls
- Communicating modulating Infinity system with Infinity Control, Infinity zoning and Infinity cooling
- 3-digit display showing fault codes and furnace status; Bluetooth and NFC service tools
- RAT and SAT thermistor connections for temperature rise
System integrations
- Infinity air conditioner or heat pump (dual-fuel) with communicating control
- Infinity zoning for single- and multiple-zone systems
- Field-supplied filter or optional media filter cabinet
Manuals, codes and service
Documents
Fault codes that apply
None documented yet.
BC Wide service
This catalogue page is reference information for anywhere in Canada. On-site service for this model is available across Greater Vancouver from BC Wide's Burnaby base — see furnace service in Burnaby and all service areas.
Questions people ask
Is this the most powerful gas furnace Carrier makes?
It is the largest of the current Infinity 98 modulating family at 120,000 BTU/h input. Carrier's Comfort 96 single-stage line extends to 140,000 BTU/h, but not as a modulating furnace.
Does the Infinity 98 run on a standard thermostat?
As a communicating modulating furnace it is designed for an Infinity Control or compatible Infinity user interface; the modulating behaviour depends on the communicating control. Confirm the control configuration with the installer.
Considering the 59MN7C 120C24–22?
Get a published ballpark range for a supply-and-install, then a consultation to confirm sizing from a heat-loss assessment. Equipment-only pricing is not offered on this site.