• Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100
  • Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100

Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100

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  • Full Interior Kit
  • Since 2009

Reznor UDX 100,000 BTU Natural Gas Unit Heater - NUDX100

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
  • Versatile heating for mid-to-large spaces
    With 100,000 BTU output, this unit is ideal for larger garages, workshops, and light commercial buildings, offering strong, consistent heat without stepping into oversized industrial capacity.
  • Efficient performance for daily use
    Rated at ~82–83% thermal efficiency, it strikes a practical balance between fuel savings and heating power, making it cost-effective for regular operation.
  • Built for durability in demanding environments
    The TCORE2 titanium-stabilized aluminized steel heat exchanger ensures long-term resistance to corrosion and wear—key for workshops or industrial settings.
  • Strong airflow & heat distribution
    Equipped with an axial propeller fan (~1300+ CFM), it delivers wide air coverage and helps maintain even temperatures across larger areas.
  • Quiet, low-vibration operation
    Designed with vibration-isolated motors and fans, it keeps noise levels relatively low (~54 dB), suitable for active workspaces.
  • Installer-friendly & service-ready design
    Features like LED diagnostics, fault-code display, and external wiring access simplify installation and maintenance—reducing downtime and service costs.
  • Flexible installation options
    Supports power venting and optional separated combustion, making it adaptable for dusty, tight, or complex installations.

Q&A

Q: What is the heating capacity of the Reznor UDX100?
A: It delivers 100,000–105,000 BTU input (~87,000 BTU output), ideal for medium to large garages, workshops, and commercial spaces.

Q: What efficiency rating does this unit heater offer?
A: The UDX100 operates at up to 83% thermal efficiency (AFUE), helping reduce energy costs.

Q: What fuel type does the NUDX100 use?
A: It runs on natural gas and can be converted to propane with an optional conversion kit.

Q: Is the Reznor UDX100 power vented?
A: Yes, it features power venting, which minimizes heat loss and improves overall efficiency.

Q: What makes the heat exchanger durable?
A: It includes a TCORE2 titanium-stabilized aluminized steel heat exchanger for long-lasting, corrosion-resistant performance.

Q: How efficient is the airflow system?
A: It uses an axial propeller fan delivering ~1345 CFM, ensuring consistent and even heat distribution.

Q: Is installation and maintenance easy?
A: Yes, it features external wiring access, LED diagnostics, and multiple suspension options for simplified installation and servicing.

Q: What applications is this heater best for?
A: Ideal for garages, warehouses, workshops, and light industrial environments needing reliable, high-performance heating.

Maintenance Tips
  • Clean heat exchanger annually: Maintain the TCORE2® aluminized steel exchanger to prevent carbon buildup and keep ~83% efficiency.
  • Inspect burner & ignition system: Check direct spark ignition and flame sensor for safe, reliable startup.
  • Ensure venting is clear: Power-vented system must remain unobstructed to avoid heat loss and exhaust issues.
  • Check fan & airflow: Clean axial propeller fan and confirm proper airflow (~1300+ CFM) to prevent overheating.
  • Inspect motor & wiring: Verify 115V electrical connections and sealed control compartment components are secure.
  • Monitor LED diagnostics: Use onboard fault code display for quick troubleshooting and preventive maintenance.
  • Keep unit dust-free: Essential for garages/workshops to maintain airflow and combustion quality.
  • Schedule annual professional service: Extends lifespan and ensures safe commercial/industrial operation.

  • 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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    New Install : 2026 Ford F250 Seat Covers

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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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