Reznor UDX 30,000 BTU Propane Unit Heater - NUDX30,N1036536R
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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Compact yet capable heater
The Reznor UDX 30,000 BTU Propane Unit Heater (NUDX30, N1036536R) delivers efficient heat for smaller commercial or workshop spaces, making it ideal for garages, shops, or utility rooms that don’t require high‑capacity units.
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Good efficiency for its size
Around 82 % AFUE efficiency, it balances fuel use and heat output, helping keep operating costs reasonable in everyday use.
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Built for reliability
Features a TCORE2 titanium‑stabilized aluminized steel heat exchanger designed to withstand frequent cycling and everyday commercial use.
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Low noise & solid airflow
A vibration‑isolated axial propeller fan keeps noise low (~40 dB) while providing effective circulation (~456 CFM) for even heat spread.
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Easy service & diagnostics
Includes LED status indicators and a 7‑segment display for fast troubleshooting, reducing maintenance time and costs.
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Flexible installation
Power‑vented design minimizes heat loss up the flue and offers flexible mounting options (horizontal or suspended) with external gas connection for easy servicing
Q&A
Q1: What size area is this heater for?
A: With 30,000 BTU input and ~24,600 BTU output, this propane unit heater is suited for small to medium garages, workshops, or commercial spaces needing efficient supplemental heat.
Q2: What fuel does the UDX30 use?
A: It runs on liquid propane (LP) and includes the factory‑approved propane setup (N1036536R) for proper combustion.
Q3: How efficient is the unit?
A: It delivers around 82–83 % AFUE efficiency, providing solid heat output with optimized fuel use.
Q4: Is this model current or replaced?
A: The original UDX‑30 has been discontinued and replaced by the newer UDXC‑30 series, but many suppliers still offer this model.
Q5: What are its durability and build features?
A: It includes a TCORE2 titanium‑stabilized aluminized steel heat exchanger, an axial propeller fan for airflow, and vibration‑isolated motors for quieter sound levels (~40 dBA).
Q6: What are airflow and noise specs?
A: Up to ~456 CFM airflow with an approx. 30 ft air throw, and a low noise design (~40 dBA) for comfortable operation in workspaces.
Q7: Is installation and service friendly?
A: Yes — it offers external gas connection, multi‑try direct spark ignition with time lockout, LED status indicator, and 7‑segment display for diagnostics.
Q8: What are the electrical and venting requirements?
A: Runs on 115 V single‑phase power with ~1.9 A draw and uses 4″ power‑vented flue connection — typical for unit heaters in this class.
Maintenance Tips
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Clean air pathways: Regularly dust the fan, louvers, and intake screen to maintain proper airflow and efficient heating.
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Check heat exchanger: Inspect for cracks, corrosion, or soot buildup annually to ensure safe combustion and long service life.
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Test ignition & propane supply: Verify direct spark ignition and propane pressure/connections to prevent misfires and uneven heat.
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Keep venting clear: Ensure the power vent and flue are free of obstructions to avoid exhaust buildup and heat loss.
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Inspect electrical components: Check wiring, controls, and diagnostic LEDs; tighten loose connections to prevent faults.
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Verify conversion kit (N1036536R): Confirm proper installation and calibration for safe propane operation.
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Annual professional service: Helps maintain efficiency, reliable performance, and compliance with warranty guidelines.
