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 48 Reviews Add Your Review

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Model

UDX-75

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

Thermostats

Mounting Brackets

Downturn Nozzles & Vertical Louvers

Vent Kits

Qty

4 Questions Answered

Description

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

Product Specs

More Information
Reznor UDX 75,000 BTU Natural Gas Unit Heater
Feature	Spec
SKU	UDX-75
Weight (in lbs)	81
Brand/Manufacturer	Reznor
Replaces	UDX-75
UPC	663132524860
Additional Information	Air Throw: 57 Feet
Furnace Efficiency / AFUE	80-85%
Heating BTU	75,000 BTU
Maximum CFM	961
Decibel Level (dBA)	49dB at 15ft
Flue Outlet	4"
Watt	217 Watts
Efficiency	83%
Electrical	115 Volt 1 Phase 60 Hertz
Amperage Requirement	3.7 Amps
Connection	1/2" NG/LP Connection to Gas Valve
Fuel Type	Natural Gas
Height	16 3/4"
Width	27"
Depth	31 29/32"
Warranty	9 Year Heat Exchanger, Burner, and Flue Collection Box Assembly; 4 Year All Electrical and Mechanical Components
Resources	Reznor UDX Installation Guide Reznor UDX Venting Guide Reznor UDX Gas Conversion Guide Reznor Conversion Kit Installation Manual Reznor UDX Replacement Parts List Reznor UDX Downturn Nozzle Instructions Reznor Unit Heater Catalog Reznor Unit Heater Brochure Reznor Warranty Info You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	This gas appliance requires a trained technician to install. Improperly connecting gas lines or improperly connecting a gas flue or venting may result in death. By purchasing this item, you are agreeing that you are using a trained technician to install this gas appliance. We will not be responsible for any injury or property damage arising from improper service or service procedures. Whoever installs or services this unit assumes responsibility for any personal injury or property damage which may result. Many jurisdictions require a license to install this equipment. PROPOSITION 65 WARNING This product and many products on our site may contain a chemical known to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.

Reviews 48

Customers Say

A UDX100 owner reports heating a 950-square-foot garage from 35° to 70° in 15–20 minutes, while a UDX 60K owner reports three trouble-free seasons heating a Northern Michigan workshop. Reviewers describe easy installation and quiet operation, and one replacement matched a smaller previous unit’s dimensions; reported drawbacks include an incorrect conversion kit, a delivery left in snow, and high cost.

AI Generated from the text of customer reviews

Top reviews

Reznor UDX 60K

Quality
100%

Service
100%

Price
100%

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.
Review by Reznor
Posted on 3/5/26
UDX200

Quality
100%

Service
100%

Price
100%

Great looking heaters, and performs wells. great service.
Review by Cory
Posted on 2/25/26
Great company with excellent ability to reach service department and willingness to assist with issues.

Quality
100%

Service
100%

Price
100%

Great supportive company.
Review by Steve
Posted on 5/11/25
Great Heater

Quality
100%

Service
100%

Price
100%

Works great. Nice quality, easy installation.
Review by numb
Posted on 3/28/25
Reznor 75000

Quality
100%

Service
100%

Price
100%

Great product. HVAV Direct was easy to work with. WOULD buy again!!
Review by bg
Posted on 1/20/25
Reznor 150,000 BTU Furnaces

Quality
100%

Service
100%

Price
100%

Purchased 4 Reznor hanging furnaces for our shop expansion space. Quick delivery, and good quality product. Good pricing as well. Installation was very easy with no issues to report. Will definitely recommend HVAC Direct and also purchase from again.
Review by JF
Posted on 1/14/25
Hot and Reliable

Quality
100%

Service
100%

Price
100%

I heat my 35,000 cubic foot shop with this thing with ease. It gets that place as hot as I want it in less than ten minutes. Perfect for climate control which is what I needed. Set the thermostat, and it fires up right on schedule as needed. It’s been -11 degrees already, and this thing has kept my shop at 60 degrees right on through no problem. Great purchase. I highly recommend.
Review by Tom
Posted on 12/17/24
Very good

Quality
100%

Service
100%

Price
100%

Great service, price, delivery time and products works well and looks good.
Review by Pac
Posted on 12/17/24

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Accessories

FAQ's

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.

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!

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!

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.

Helpful Articles

Why Choose Reznor Unit Heaters?

Reznor unit heaters are engineered for powerful, energy-efficient heating in commercial, industrial, and residential spaces. With durable construction and advanced technology, these heaters deliver reliable warmth, even heat distribution, and flexible installation options—making them ideal for warehouses, garages, workshops, and more.