• Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75
  • Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75

Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75

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  • Full Interior Kit
  • Since 2009

Reznor UDX 75,000 BTU Natural Gas Unit Heater - NUDX75

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
  • Perfectly sized for medium spaces
    With 75,000 BTU, this unit hits the sweet spot for garages, workshops, and small commercial areas—powerful enough for consistent heating without oversizing.
  • Reliable efficiency for everyday use
    Operating at ~83% AFUE, it delivers solid fuel efficiency while maintaining strong heating output—ideal for users balancing performance and energy costs.
  • Built to last in tough environments
    The TCORE2 aluminized steel heat exchanger resists corrosion and wear, making it a dependable choice for dusty or high-use environments.
  • Quiet and comfortable operation
    A vibration-isolated fan system keeps noise levels low (~49 dB), making it suitable for active workspaces where comfort matters.
  • Strong air circulation coverage
    With up to 961 CFM airflow and ~57 ft air throw, it distributes heat evenly—reducing cold spots in mid-sized areas.
  • Installer-friendly & easy maintenance
    Features like LED diagnostics, 7-segment display, and external gas connection simplify servicing and troubleshooting—saving time and cost long-term.
  • Flexible mounting & venting options
    Supports ceiling or wall installation with power venting to reduce heat loss and adapt to different layouts.

Q&A

Q: What is the heating capacity of the Reznor UDX75?
A: It provides 75,000 BTU input (≈62,000 BTU output), ideal for garages, workshops, and small commercial spaces.

Q: What efficiency rating does this unit heater offer?
A: The UDX75 operates at up to 83% AFUE efficiency, helping reduce energy consumption.

Q: What fuel type does the NUDX75 use?
A: It runs on natural gas and can be converted to propane with a compatible kit.

Q: Is the Reznor UDX75 power vented?
A: Yes, it features power venting, which improves efficiency by minimizing heat loss through the flue.

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

Q: How quiet is this unit heater?
A: Designed with vibration-isolated motors, it operates at low noise levels (~49 dB) for quieter performance.

Q: Is installation and maintenance easy?
A: Yes, it offers external gas connections, multiple mounting options, and LED diagnostics for simple installation and servicing.

Q: What applications is this heater best for?
A: Perfect for residential garages, workshops, and light commercial spaces needing reliable heating.

Q: Does it include airflow features?
A: Yes, it uses an axial propeller fan with horizontal louvers for efficient air distribution (up to ~57 ft air throw).


Maintenance Tips
  • Clean heat exchanger yearly: The TCORE2® aluminized steel exchanger should stay dust/carbon-free to maintain ~83% efficiency and prevent overheating.
  • Inspect burner & ignition system: Check multi-try direct spark ignition and flame sensor for consistent startup and safe combustion.
  • Clear venting system: Ensure power-vent flue is unobstructed to avoid heat loss and airflow issues.
  • Check fan & motor performance: Clean axial fan blades and inspect vibration-isolated motors for quiet, efficient airflow.
  • Tighten gas & electrical connections: External gas connections and wiring should remain secure and leak-free.
  • Monitor LED diagnostics: Use onboard display/LED indicators for early fault detection and troubleshooting.
  • Keep unit clean (dust/debris): Prevent airflow restriction and maintain consistent heating output.
  • Annual professional service: Extends lifespan, protects warranty (up to 9-year heat exchanger), and ensures safe 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.

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