• Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R
  • Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R

Reznor UDX 250,000 BTU Propane Unit Heater - NUDX250,N1036540R

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  • Full Interior Kit
  • Since 2009

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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • Burner & ignition system care: Clean burner tubes and inspect direct spark ignition and flame sensor for reliable starts and efficient propane combustion.
  • Keep venting unobstructed: Ensure the power‑vent flue and combustion air paths are clear of debris to maintain proper draft and safe exhaust.
  • Fan & blower maintenance: Remove dust from the axial fan and check motor bearings, vibration mounts, and airflow balance to avoid overheating and noise.
  • Tighten gas & electrical connections: Verify 115 V wiring, gas fittings, and control wiring are secure and free of corrosion for consistent operation.
  • Monitor LED/diagnostics: Use status LEDs and 7‑segment fault codes for early issue detection before failures occur.
  • Keep exterior clean: Regularly remove dust/debris from cabinet and louvers to support airflow and heater efficiency.
  • Professional annual service: A qualified HVAC tech should perform combustion checks, pressure testing, and safety control inspection.

  • DIY Install

  • OEM-Inspired Fit

  • Air Bag Friendly

  • 3 Year Warranty

  • Custom Colors

  • Work Gear & Pet Friendly

  • Since 2009

Why Truck Owners Choose Seat Covers Over Reupholstery

Traditional Reupholstery TruckLeather Seat Covers
Upfront Cost

$2500-$4000+

$399-$999

Vehicle Downtime

Days or Weeks

None

Risk Level

Permanent, No Undo

Fully Reversible

Best Use Case

Full Restorations

Restoration or Prevention

Resale Value Impact

High Cost to Recover

High ROI

TruckLeather gives you 90% of the visual and comfort upgrade at a fraction of the cost of reupholstery without giving up your truck.

WHEN YOUR TRUCK DESERVES THE BEST. UPGRADE YOUR TRUCK'S INTERIOR WITH THE INDUSTRY DEFINING TRUCK SEAT COVERS WE HAVE REFINED OVER 15 YEARS.

  • Will these work if my seats are already damaged?

    Yes. TruckLeather seat covers are commonly used to cover cracked, faded, or worn-out truck seats while preventing further deterioration.

  • How do these compare to cheaper seat covers?

    Universal covers focus on price. TruckLeather focuses on fit, durability, and long-term protection.

  • Are these permanent?

    No. They’re fully removable and won’t alter your factory seats.

Slip on leather seat covers
Slip on leather seat covers

Easy At-Home Installation

No special tools. No upholstery shop. No risk.

Our seat covers are designed for DIY installation, with step-by-step instructions and support available if you need it. Most customers complete installation in a few hours.

STEP BY STEP INSTRUCTIONS
Red and Black Custom Leather Seat Covers for Ford F150

Your Truck.Your Style.

Custom orders are our jam. Our custom program makes for a truly bespoke experience leaving only your imagination for the thousands of possibilities. If you're looking for the best truck seat covers then look no further!

Clazzio seat cover

Airbag Safe

Our seat cover construction has a high priority for allowing the OEM seat airbags to properly deploy when needed.

The proprietary thread design allows for the SRS systems to continue to function in a collision situation.

Clazzio Leather Covers

Made for your truck.For life.

Our seat covers are made exactly for your interior setup, perfect every time.

We offer most color setups in stock such as all black and all dark gray, however our custom color program is ready for your creative setups.

FAQ

Learn more about our truck seat covers with the frequently asked questions below.

DIY installation instructions are included for your specific application and takes around 2-3 hours for full interior installation.

The specific application specific instructions provided have step by step photos of how to install your new seat covers as well as tips and tricks. 

If you don't feel comfortable installing the seat covers yourself, then any local upholstery shop should be able to install them no problem.

Some vehicles do require cutting in certain spots like the power seat control panel, but nothing too major.

These leather seat covers are 100% slip on seat covers and do not require removal of your existing seat material.

Yes, our seat covers are fully compatible with factory heated and cooled seats.

Clazzio (our manufacturer) offers a 3 year warranty that is honored on any manufacturer defects.  This does not include normal wear and tear that comes with use on these seat covers.

You will receive the full interior seat cover set which includes bottom cushion covers, top cushion covers, head rest covers, and depending on the vehicle, arm rest covers.  It is a total makeover.

They are made by 11i-USA who manufactures these under the name Clazzio. They operate a large dealer system and we are a top nationwide dealer for them.

It depends if you ordered a custom set or not.


If you ordered a set that is in stock, then it will reach you in approximately 5-6 days via UPS ground (continental U.S.). Most all black or all dark gray sets are in stock, but we will let you know upon your order.


If you ordered a custom set, then it will take 8-10 weeks (occasionally longer) to arrive from Japan due to custom manufacturing, freight time, and US customs holding time.

Maybe! Contact us to see if your specific vehicle isn't listed on our site, or if you have any questions about the application.

We do have other applications such as passenger vehicles and two door cars as well. Just contact us!

Need just a bottom cushion replacement or another single piece? Contact us for pricing.

We can also supply just the front or rear seats if that is all you need.

Since our seat covers are manufactured for every application specifically, they account for features like these in your interior. Our development team uses a laser guided measuring system to ensure the best fitment for our seat covers.

For straps to fold down seats, they will include a cutout for those to loop through.  For bottom plastic trim on your front seats, the covers are meant to tuck in to those for a great, OEM+ fitment.

Yes, our seat covers are made with special stitching construction on our per application basis (not universal). The design allow for our covers to break at the specific points where the side airbags will detonate.

Blog posts

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  • Seat Covers vs. Reupholstery: The Smarter Way to Restore and Protect Your Truck Seats

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  • When to Replace Truck Seat Covers: 7 Signs Your Truck Seats Need an Upgrade

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