Reznor UDX 150,000 BTU Natural Gas Unit Heater - NUDX150
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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Ideal mid-range commercial heating power
With 150,000 BTU input, this unit is perfect for medium to large spaces like workshops, garages, and small warehouses—delivering strong heat without the oversizing of higher BTU models.
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Efficient and cost-conscious operation
Rated at ~83% AFUE, it offers solid fuel efficiency for daily use, making it a smart choice for businesses looking to balance performance and operating costs.
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Proven durability in demanding environments
Built with a TCORE2 titanium-stabilized aluminized steel heat exchanger, it’s designed for long-term reliability under continuous use.
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Consistent airflow & coverage
Producing around ~1,900+ CFM with up to ~70+ ft air throw, it ensures even heat distribution across mid-sized commercial spaces.
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Quiet and workspace-friendly
Features vibration-isolated fan and motor design, keeping noise levels relatively low (~51 dB)—important for occupied work areas.
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Smart diagnostics = less downtime
Includes LED status indicators and a 7-segment display, making troubleshooting quick and maintenance more efficient.
Q&A
Q1: What size space can the Reznor UDX150 heat?
A: With 150,000 BTU input and ~124,500 BTU output, it’s ideal for medium to large garages, workshops, and commercial spaces.
Q2: How efficient is the Reznor UDX150?
A: It offers up to 83% AFUE efficiency, providing strong heating performance with energy savings.
Q3: What fuel type does this unit heater use?
A: The UDX150 runs on natural gas and can be converted to propane (LP) with an optional kit.
Q4: Is the UDX150 suitable for commercial or residential use?
A: Yes, it’s designed for commercial, industrial, and large residential applications like garages and workshops.
Q5: What makes the Reznor UDX150 durable?
A: It features a TCORE2 titanium-stabilized aluminized steel heat exchanger, built for long-lasting, corrosion-resistant performance.
Q6: How strong is the airflow and heat distribution?
A: The unit delivers up to ~1,900+ CFM airflow with an air throw of ~73 feet, ensuring even heating coverage.
Q7: Does the UDX150 operate quietly?
A: Yes, it includes a low-noise axial fan and vibration-isolated components, helping reduce operating noise.
Q8: Is installation and maintenance easy?
A: The heater includes external gas connections, LED diagnostics, and a simple control board, making installation and servicing straightforward
Maintenance Tips
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Clean fan & airflow system: Remove dust from the axial propeller fan and louvers to maintain strong airflow (≈1921 CFM) and efficient heat distribution.
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Inspect heat exchanger annually: Check the TCORE2® aluminized steel exchanger for cracks or corrosion to ensure safe operation and long lifespan.
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Check ignition & gas pressure: Test the direct spark ignition system and verify gas pressure to prevent startup issues and uneven heating.
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Keep venting system clear: Ensure the power vent and flue (5" outlet) are free from obstructions to avoid heat loss and exhaust hazards.
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Monitor electrical components: Inspect wiring, LED diagnostics, and control board for faults; tighten loose connections to avoid downtime.
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Inspect motor & noise levels: Check vibration-isolated fan and venter motors for smooth, low-noise operation.
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Schedule yearly professional servicing: Maintains efficiency (~83% AFUE) and ensures warranty compliance (up to 9 years on heat exchanger).
