Carrier · Infinity 98 with Greenspeed (59MN7C) · Model
Carrier Infinity 98 59MN7C 060C21–20
The 59MN7C 060C21–20 is Carrier's highest-certified residential gas furnace: a modulating Infinity 98 whose gas input runs from 24,000 to 60,600 BTU/h, certified at 98.5% AFUE upflow and horizontal and 96.7% downflow, in a 21-inch cabinet.
Rating plate
- Model
- 59MN7C 060C21–20
- Input
- 24,000 – 60,600 BTU/h
- Output
- 2,400 – 60,000 BTU/h
- AFUE
- 98.5% upflow · 96.7% down/horiz
- Burner
- Modulating
- Blower
- ECM, constant airflow
- Fuel
- Natural gas / Propane
- Cabinet
- 35 × 21 × 29.5 in
- Canada
- Available in Canada
This size carries the family's headline figure: Carrier certifies 98.5% AFUE upflow and horizontal, the highest number in its product data, and 96.7% downflow. Its modulating gas valve and variable-speed inducer step the input between 24,000 BTU/h minimum and 60,600 BTU/h maximum through intermediate rates, matched continuously to the house's demand.
The 21-inch cabinet holds three burners and a 1 HP communicating constant-airflow blower reaching 1,920 CFM for cooling. The narrow 17.5-inch sibling (060C17–14) modulates over the same 24,000 to 60,000 BTU/h input band with a 1/2 HP blower and certifies 97.4% upflow and horizontal.
A modulating furnace only earns its price when it is sized so that minimum-fire output is genuinely low relative to the house's needs on mild days. Carrier's product data repeats the family sizing rule that none of the sizes may be used where the heating load is 20,000 BTU/h or lower; the selection belongs to a heat-loss calculation and careful control set-up.
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 | 60,600 BTU/h | |
| Input, intermediate heat | 39,000 BTU/h | |
| Input, minimum heat | 24,000 BTU/h | |
| Output | ||
| Output capacity, maximum heat | 60,000 BTU/h | Carrier product data; DOE test procedure, position dependent. |
| Output capacity, intermediate heat | 39,000 BTU/h | |
| Output capacity, minimum heat | 2,400 BTU/h | Printed as 2,400 BTU/h in Carrier product data 59MN7C-01PD, which is inconsistent with the 24,000 BTU/h minimum input published for the same size. Confirm the certified figure from the rating plate before quoting. |
| Efficiency | ||
| AFUE, upflow / horizontal | 98.5 % | |
| AFUE, downflow | 96.7 % | |
| Airflow | ||
| Certified temperature rise, maximum heat | 35 – 65 °F (19 – 36 °C) | |
| Certified temperature rise, intermediate heat | 40 – 70 °F (22 – 39 °C) | |
| Certified temperature rise, minimum heat | 25 – 55 °F (14 – 31 °C) | |
| Airflow, maximum heat @ rated ESP | 1,020 CFM | |
| Airflow, intermediate heat @ rated ESP | 600 CFM | |
| Airflow, minimum heat @ rated ESP | 475 CFM | |
| Cooling airflow @ 0.5 in. w.c. | 1,920 CFM | |
| Cooling capacity match | 4.5 tons @ 400 CFM/ton; 5.5 tons @ 350 CFM/ton | |
| Blower motor | Communicating variable-speed, constant-airflow (VCA) ECM | Measures and holds the airflow the control requests. |
| Physical | ||
| Cabinet width | 21 in | 533 mm |
| Approximate shipping weight | 160 lb | 72.3 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 | 3 | |
| Inducer | Variable-speed | |
| Fuel | Natural gas; propane with gas conversion accessory | |
Variants
Sizes that share this model page. A variant gets its own page only when it has substantial independent value.
| Size | Input high | Input low | Output high | Output low | AFUE upflow | AFUE down/horiz | Width (in) | Ship wt (lb) | Cooling CFM | Motor HP |
|---|---|---|---|---|---|---|---|---|---|---|
| 060C21–20 | 60,600 | 24,000 | 60,000 | 2,400 | 98.5 | 96.7 | 21 | 160 | 1920 | 1 |
| 060C17–14 | 60,000 | 24,000 | 59,000 | 24,000 | 97.4 | 95 | 17.5 | 144 | 1275 | 1/2 |
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
- Houses whose heat loss varies widely and where quiet, steady low-capacity heating is wanted
- Communicating Infinity systems at the top of Carrier's residential line
- Buyers who want the certified 98.5% AFUE point with a modulating burner
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
Guides that reference this model
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
What is the true minimum output of this furnace?
Carrier's product data prints the 060C21–20 minimum-heat output as 2,400 BTU/h, which contradicts its published 24,000 BTU/h minimum input. The apparent intended figure is 24,000 BTU/h; confirm from the rating plate or Carrier before quoting. The 060C17–14 sibling prints 24,000 BTU/h for the same input.
How is 98.5% AFUE possible while the downflow figure is 96.7%?
Certified AFUE depends on the installed position and the size's test results. Carrier publishes 98.5% upflow and horizontal and 96.7% downflow for this size; the rating plate states the figure for the installed position.
Considering the 59MN7C 060C21–20?
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.