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Reznor UDX 75,000 BTU Natural Gas Unit Heater

Reznor UDX 75,000 BTU Natural Gas Unit Heater
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Customer reviews
Rating:
4.9 out of 5
4.9 out of 5 View All 57  Reviews Add Your Review
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By

Reznor

In stock
Model

UDX-75

ID

55752

Was $1,909.00 Your Low Price Special Price $1,199.00
 
Product Features
  • Ideal for smaller residential garages, workshops, and workspaces
  • Built with corrosion-resistant materials for enhanced durability
  • Suitable for ceiling or wall mounting with multiple venting options
  • Advanced fan design ensures quiet and efficient heating
4 Questions Answered

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.


Included

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

Standard Features

  • 83% AFUE Efficiency
  • TCORE2 Titanium-Stabilized Aluminized Steel Heat Exchanger
  • Multi-Try Direct Spark Ignition with Time Lockout
  • Low Noise Operation with Vibration-Isolated Fan and Venter Motors
  • Status-Indicating LED Light
  • 7-Segment Display Board for Simple Troubleshooting
  • Optional Integrated Downturn Nozzle and Integrated Vertical Louvers
  • 2- and 4-Point Suspension Options
  • External Gas Connection for Ease of Maintenance and Installation
  • Includes 3 Horizontal Louvers
  • ETL Approved

Product Note

Reznor UDAP is the legacy model of the Reznor UDX

More Information
Reznor UDX 75,000 BTU Natural Gas Unit Heater
FeatureSpec
SKUUDX-75
Weight (in lbs)81
Brand/ManufacturerReznor
ReplacesUDX-75
UPC663132524860
Additional InformationAir Throw: 57 Feet
Furnace Efficiency / AFUE 80-85%
Heating BTU75,000 BTU
Maximum CFM961
Decibel Level (dBA)49dB at 15ft
Flue Outlet4"
Watt217 Watts
Efficiency83%
Electrical115 Volt 1 Phase 60 Hertz
Amperage Requirement3.7 Amps
Connection1/2" NG/LP Connection to Gas Valve
Fuel TypeNatural Gas
Height16 3/4"
Width27"
Depth31 29/32"
Warranty9 Year Heat Exchanger, Burner, and Flue Collection Box Assembly; 4 Year All Electrical and Mechanical Components
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
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Customers Say

Across multiple BTU sizes, owners report straightforward installation and strong heating performance, with examples including a 950 sq ft garage reaching 70°F from 35°F in 15–20 minutes, a 60x40x16 shop heating from 58°F to 70°F in 35 minutes, a 46x60 shop with 16 ft ceilings heating quickly, and a 35,000 cubic foot shop holding 60°F in -11°F conditions. Buyers note quiet operation, easy replacement of older units using existing mounts or minor vent modifications, durable long-term performance from prior Reznor models lasting nearly 20 years, occasional issues like an incorrect conversion kit or poor freight delivery, and generally prompt shipping with secure packaging.

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Top reviews
  1. Reznor UDX 60K
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    The unit was packaged well, and the installation was straightforward. It’s heated my workshop in Northern Michigan for three seasons now, and it’s been flawless.

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  2. UDX200
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    Great looking heaters, and performs wells. great service.

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  3. Great support easy transaction
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    Great support and quality product will buy fromagain

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  4. Reznor 60K BTU
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    HVAC Direct delivered on time and unit was incredibly packaged for freight. The unit itself is performing quite well in an uninsulated garage. Keeps everything from freezing. I could not be happier with this purchase and my purchase experience. I will definitely purchase from HVAC Direct when its time to heat my 30x40 barn.

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  5. Outstanding product
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    Got a 46x60 shop with 16ft ceilings the reznor 150,000 btu heats it up fast runs quiet totally surprised how this unit performs

    Review by

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  6. Fast delivery, great price, excellent packaging with zero damage. Easy to install.
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    Ordered to replace an old UDAP 45. Basically the same but taller. Fit fine as a hanging unit in the garage. Quieter and warmer output than the old one. Pretty much just unhooked the old one, unmounted it and mounted the new one with the same bolts, reattached connections with a slight modification to the venting. Free shipping and it still got here in less than a week. Overall, great experience with HVACDirect and the price was the lowest I could find.

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  7. Great heater
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    Easy installation, quiet and works very well!

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  8. Great purchase
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    We just installed this unit today and it heated my shop up from 58degs. To 70degs. In 35 minutes. The shop is 60x40x16 high.

    Review by

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Customer Questions
Does this unit have a wireless thermostat?
This model currently does not have an applicable wireless thermostat. If you have any further questions, please call us and we will be happy to assist you.
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Does the unit come with the Reznor specific vent cap?
The Reznor vent cap will not come with this unit when ordered but can be bought as a separate accessory. If you have any further questions we recommend that you give us a call. Thanks!
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Can this UDX 75,000 BTU heater come with the LP gas conversion already installed?
Hello, thanks for your question. Unfortunately, with Reznor units the liquid propane conversion will not come pre-installed and will have to be manually installed. If you have any further questions, we recommend that you give us a call. Thanks!
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Can this heater be used to heat a home?
These heaters can be used in a garage, but they are not approved for use in indoor living spaces. If you have any further questions, please feel free to give us a call! Thanks.
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Did you find what you were looking for?
5 Best Garage and Shop Heaters
When you need dependable heat in your garage or workshop, only the best will do. Our 2025 picks spotlight top-performing heaters across key categories. For overall reliability and value, the Modine Hot Dawg HD30 stands out—its propane-fired 30,000 BTU output delivers quiet, consistent warmth while fitting in tight spaces and backed by a 10-year warranty on vital components. If electric is your preference, the Reznor EGW‑5 offers instant, clean heat in a compact design that installs quickly and features built-in thermostat control.
May 22, 2022
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