Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
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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Designed for heavy‑duty commercial & industrial heating
With 250,000 BTU input and ~83 % efficiency, this propane unit delivers the high‑capacity, consistent heat needed for large garages, warehouses, workshops, and workspaces—making it a solid choice where standard heaters fall short.
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Reliable, long‑lasting construction
Built with a TCORE2 titanium‑stabilized aluminized steel heat exchanger, it resists corrosion and wear under tough conditions—translating to years of dependable performance in demanding environments.
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Smart, service‑friendly features
The 7‑segment diagnostic display and status LED simplify troubleshooting, while external gas connections make maintenance and installations quicker and more cost‑efficient.
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Balanced airflow with quiet operation
The vibration‑isolated axial propeller fan delivers strong circulation and wide heat distribution (high CFM), yet keeps noise competitive for its class—important in busy workspaces.
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Flexible installation & modular options
Power‑venting plus optional downturn louvers and vertical airflow accessories help tailor performance and airflow direction to layout needs.
Q&A
Q: What is the heating capacity of the Reznor UDX250?
A: It delivers 250,000 BTU input (~207,500 BTU output) of powerful heat for commercial, industrial, and large workshop heating.
Q: What fuel type does this model use?
A: Designed for propane (LP) operation, with ETL approval for indoor commercial/industrial use.
Q: How efficient is the UDX250?
A: It achieves about 83 % AFUE thermal efficiency, maximizing heat while minimizing fuel consumption.
Q: What heat exchanger technology does it include?
A: Features a TCORE2 titanium‑stabilized aluminized steel heat exchanger for enhanced durability and corrosion resistance.
Q: What type of ventilation does it require?
A: It’s power‑vented, reducing heat loss and improving overall performance.
Q: How quiet is the heater’s operation?
A: Equipped with vibration‑isolated fan and venter motors for low noise operation.
Q: Is installation and maintenance straightforward?
A: Yes — includes external status LED and 7‑segment display for diagnostics and external gas connection for easier service.
Q: What applications is this heater best for?
A: Ideal for large commercial facilities, warehouses, and heavy‑duty workshop heating needs.
Maintenance Tips
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Annual heat exchanger inspection & cleaning: Check the TCORE2® titanium‑stabilized aluminized steel heat exchanger for soot, corrosion, and blockages — keeping it clean preserves ~83% AFUE and prevents overheating.
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Burner & ignition system care: Clean burner tubes and inspect direct spark ignition and flame sensor for reliable starts and efficient propane combustion.
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Keep venting unobstructed: Ensure the power‑vent flue and combustion air paths are clear of debris to maintain proper draft and safe exhaust.
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Fan & blower maintenance: Remove dust from the axial fan and check motor bearings, vibration mounts, and airflow balance to avoid overheating and noise.
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Tighten gas & electrical connections: Verify 115 V wiring, gas fittings, and control wiring are secure and free of corrosion for consistent operation.
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Monitor LED/diagnostics: Use status LEDs and 7‑segment fault codes for early issue detection before failures occur.
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Keep exterior clean: Regularly remove dust/debris from cabinet and louvers to support airflow and heater efficiency.
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Professional annual service: A qualified HVAC tech should perform combustion checks, pressure testing, and safety control inspection.
