NDF600-050M2V3B premium features and benefits
2-stage gas valve.
Adjusts heating output between low & high fire to better match heating demand, helping maintain more consistent indoor temperatures than a single-stage furnace
Variable-speed ECM blower.
Delivers efficient, adaptive airflow for heating and cooling while supporting quieter starts, stops & continuous fan operation.
Integrated controls.
Built-in diagnostics & fault code history help technicians identify issues faster, troubleshooting & service.
Modular blower assembly.
Service-friendly blower access reduces labor time when inspection, cleaning, or maintenance service is needed.
Primary & secondary
heat exchangers.
T140 aluminized primary heat exchanger tubes & 29-4C stainless steel heat recovery coil for durable condensing performance.
Flexible vent & drain routing.
Multiple venting, inducer & condensate trap configurations adapt to upflow, downflow & horizontal installations.
NDF600-050M2V3B QuickFacts
17.5" W x 34.0" H x 29.5" D (44.5cm W x 86.4cm H x 74.9cm D)
| Model | NDF600-050M2V3B | |
|---|---|---|
| Input | Max heat | 53,000 BTU/h (15.53 kWh) |
| Min heat | 36,000 BTU/h (10.55 kWh) | |
| Output | Max heat | 50,000 BTU/h (14.65 kWh) |
| Min heat | 34,000 BTU/h (9.96 kWh) | |
| AFUE (%) | 96 | |
| Certified temperature rise range | High Fire | 40 - 70 °F rise (22 - 39 °C) |
| Low Fire | 35 - 65 °F rise (19 - 36 °C) | |
| Burner control | 2-Stage | |
External Static Pressure
- Heating
- 0.12 - 0.5 " WC (0.03 - 0.12 kPa)
- Cooling
- 0.1 - 1 " WC (0.02 - 0.25 kPa)
Nominal cooling capacity (TON)
- @400CFM
- 1.5 - 3.0
- @350CFM
- 1.5 - 3.5
Circulator blower
- Horsepower
- 0.5
- Motor speed & type
- Variable Speed ECM
| Item | NDF600-050M2V3B | |
|---|---|---|
| Applications | Residential, Light Commercial | |
| Dimensions | 17.5" W x 34.0" H x 29.5" D (44.5cm W x 86.4cm H x 74.9cm D) | |
| Packing dimensions | 20.0" W x 35.0" H x 33.0" D (50.8cm W x 88.9cm H x 83.8cm D) | |
| Shipping weight | lbs | |
| Weight | 128 lbs (58.1 kg) | |
| Installation orientation | Upflow / Horizontal Right / Horizontal Left / Downflow | |
| Ignition | Hot Surface Igniter | |
| Natural gas supply pressure | 5 " WC to 10.5 " WC (1.24 kPa to 2.61 kPa) | |
| Propane gas supply pressure | 11 " WC to 13 " WC (2.73 kPa to 3.23 kPa) | |
| Natural gas manifold pressure (min-max) | 1.4 " WC to 3.5 " WC (0.35 kPa to 0.87 kPa) | |
| Propane gas manifold pressure (min-max) | 5 " WC to 10 " WC (1.2 kPa to 2.5 kPa) | |
| Connection sizes | Gas inlet | 1/2 in NPT |
| Condensate outlet | .84 in (Sized for 1/2" Sched. 40 Tee Fitting) | |
| Materials | Primary heat exchanger | T140 Aluminized Steel |
| Condensing heat exchanger | 29-4C Stainless Steel | |
| Venting type | Forced Draft Direct Vent / Non-Direct Vent | |
| Max Vent Length | 2" up to 75', 3" up to 100' | |
| Venting | Exhaust | 1 1/2 - 3 in PVC, CPVC, PVC-DWV* |
| Intake | 1 1/2 - 3 in PVC, CPVC, PVC-DWV* | |
| Clearance to Combustibles | 0 in** | |
| Electrical data | Volts / Phase / Hz | 120 / 60 / 1 |
| Max breaker or fuse | 15 Amps | |
| Wire size | 14 AWG | |
**Applicable for all sides except top plenum
Navien reserves the right to change specifications at any time without prior notice.
| NDF- Coverage Table for Labor and Parts Only | |||
| Residential2 | Commercial | ||
| Parts1 | Registered3 | 10 Years | 1 Years |
| Non-Registered | 5 Years | ||
| Labor | 90 Days | ||
| NDF- Coverage Table for Combustion Heat Exchanger Only | ||
| Residential2 | Commercial | |
| Registered3 | Limited Lifetime | 10 Years |
| Non-Registered4 | 20 Years | 10 Years |
Definitions:
Parts1 – refers to all internal functional components of the unit, except for the Combustion Heat Exchanger
Residential2 – Refers to a Single-Family, residential application.
Registered3 – Refers to coverages for units registered within 60 days of the Commencement date.
Non-Registered4 – Refers to coverages for units registered 61 days or more after the Commencement Date
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NDF600-050M2V3B FAQs
How do I know which NDF model is the right size for my home?
The right furnace size depends on the home’s heating load, ductwork, climate, insulation, layout and other jobsite conditions. A qualified HVAC contractor should perform or verify a proper load calculation before selecting an NDF model.
Can this NDF model be converted to propane?
Yes. NDF furnaces are factory-equipped for natural gas and may be converted to LP gas using the optional conversion kit. Conversion must be completed by a trained and qualified installer, service agency or gas supplier.
Does this model require a special thermostat?
The NDF furnace is compatible with most 24V thermostats. A two-stage thermostat can control both heating stages directly, while a single-stage thermostat can be used with automatic staging configured at the furnace control.
What venting options are available for NDF model?
The NDF supports direct vent and non-direct vent installations when installed according to the manual and local codes. Approved concentric venting kits may also be used to combine intake and exhaust through a single wall or roof penetration.
Can this NDF model be installed at high altitude?
Yes. NDF furnaces can be installed at higher elevations when set up according to the installation manual and local code requirements. Natural gas installations don’t need conversion up to 5400ft altitude. Propane installations and elevations above 5400ft may require additional setup by a qualified contractor.
Does this model include self-diagnostics?
Yes. The integrated furnace control includes status LEDs and stores recent fault codes, helping technicians troubleshoot issues more efficiently and improve first-visit service outcomes.