Reznor UDX 100,000 BTU Propane Unit - NUDX100,N1036538R
Reznor model UDX gas-fired unit heaters are great for space heating applications. These units are power vented to eliminate heat losses up the flue pipe. Each heater features a two-tone black and white powder coated, scratch-resistant paint scheme and has clean rounded corners and edges with no visible screws or fasteners. For air circulation, the UDX series utilize an axial propellor fan.
Features
- 83% AFUE Efficiency
- TCORE2 titanium stabilized aluminized steel heat exchanger
- Multi-try, direct spark ignition with time lockout
- Vibration/noise isolated fan and venter motors designed for low noise operation
- External status indicating LED that blinks if there is a problem that needs service
- 7-segment display board that shows fault code for quick and easy troubleshooting
- Optional integrated downturn nozzle and integrated vertical louvers
What our Experts Think
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Right‑sized power for larger spaces
With 100,000 BTU and ~83 % AFUE efficiency, this propane UDX heater delivers strong, consistent heat for large workshops, garages, and light commercial areas without excess fuel waste.
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Pro‑grade durability you can count on
Built with a TCORE2® titanium‑stabilized aluminized steel heat exchanger, it resists corrosion and wear—ensuring longevity in tough job‑site or industrial conditions.
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Power‑vent design reduces heat loss
The unit’s power vented configuration helps eliminate wasted heat up the flue, improving performance and reducing operating costs.
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User‑friendly service & diagnostics
Features like LED status indicators, easy access panels, and external gas connections simplify installation and maintenance—saving time and headaches for technicians.
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Balanced airflow & comfort
The axial propeller fan with vibration isolation delivers wide air circulation quietly and effectively, helping maintain even heat distribution across larger spaces.
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Flexible mounting & application
Designed for 2‑ or 4‑point suspension mounts, it adapts to both ceiling and wall installations depending on your space layout.
Q&A
Q: What is the heating capacity of this unit?
A: The UDX100 delivers ~105,000 BTU input (~87,000 BTU output), ideal for medium garages, workshops, and commercial spaces requiring reliable heat.
Q: What fuel type does the NUDX100 use?
A: Factory‑configured for propane (LP) operation with ETL approval for indoor commercial/industrial installations.
Q: How efficient is this propane unit heater?
A: It achieves ~83 % AFUE thermal efficiency, maximizing heat output while minimizing fuel usage.
Q: What heat exchanger technology does it include?
A: Features a TCORE2® titanium‑stabilized aluminized steel heat exchanger for durability and corrosion resistance.
Q: How does it handle ventilation and airflow?
A: Power‑vented design reduces heat losses up the flue, and an axial propeller fan circulates warm air evenly.
Q: Is the operation quiet?
A: Yes — built with vibration‑isolated fan and venter motors for reduced noise during heating cycles.
Q: Is installation and service easy?
A: Includes external gas connection and is designed for 2‑ or 4‑point suspension mounting, simplifying installation and maintenance.
Maintenance Tips
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Annual heat exchanger inspection: Check the TCORE2® titanium‑stabilized aluminized steel exchanger for soot, corrosion, cracks or buildup — clean lightly to maintain ~83 % AFUE and safe operation.
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Burner & flame check: Clean burner tubes and inspect flame quality (mostly blue, steady) to ensure efficient propane combustion.
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Clear venting & intake paths: Ensure power‑vent flue and combustion air openings are free of debris to maintain proper draft and avoid backdrafting.
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Fan & motor care: Remove dust from the axial propeller fan and check for balance, noise or looseness that can reduce airflow.
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Electrical & ignition checks: Tighten wiring, inspect direct spark ignition and clean flame sensor/LED diagnostics for reliable starts.
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Gas supply inspection: Check propane line fittings for leaks and proper regulator operation before each season.
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Keep exterior clean: Dust and debris on the cabinet and louvers restrict airflow and heat transfer.
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Professional annual service: Have an HVAC technician perform combustion tests and safety control checks to maximize efficiency and lifespan.
