Toggle Nav
Search
Shopping Cart itemsitem

1-800-397-1392

Today's Hours 8am - 11pm est
0% Financing for 12 Months* or up to 48 Months* Terms Available - Buy Now and Pay later!

Reznor UDXC Unit Heaters

Save up to 40% Unit Heaters

+
$100 off $2,000 | $250 off $4,000 | $450 off $6000
CLICK FOR DETAILS!!!

$100 off $2,000
$250 off $4,000
$450 off $6000

CLICK FOR DETAILS!!!

Items 1-23 of 30

Set Descending Direction
Page
per page

What are Reznor UDXC unit heaters?

Reznor UDXC unit heaters are gas-fired suspended heating units available in capacities from 30,000 BTU to 400,000 BTU for residential, commercial, and industrial applications. They feature a low-static axial propeller fan design and a convertible separated-combustion configuration that provides reliable heating for garages, workshops, warehouses, and other large spaces. It is also helpful to know that the Reznor UDXC series has replaced the Reznor UDX and Reznor UDZ series of gas-fired unit heaters.

 

These unit heaters work by burning natural gas or propane inside a TCORE2 titanium-stabilized aluminized steel heat exchanger. An axial propeller fan pulls air across the heat exchanger and distributes the warmed air throughout the space. The units can operate as power-vented heaters or be field converted to separated combustion, allowing combustion air to be drawn from outside the building when required. Separated combustion operation is ideal when indoor air is dirty, humid, corrosive or the unit is under negative pressure. These conditions can damage standard combustion heaters and compromise their safe operation.

Browse Products By Our Top Brands

Canarm FansCanarm Fans
Canarm FansCanarm Fans
Canarm FansCanarm Fans
Canarm FansCanarm Fans
Canarm FansCanarm Fans

Are Reznor UDXC unit heaters worth it?

Reznor UDXC unit heaters offer worthy value through several benefits that make them a practical choice for garages, workshops, commercial buildings, and industrial spaces. With thermal efficiency ratings of up to 83%, they are designed for dependable performance across a wide range of applications. 

  • Strong Reputation:  Reznor is a well-established name in heating, having started in 1888. The brand is known for its industrial unit heaters and has built its reputation on durable construction, reliable performance, and broad application support.
  • Flexible Installation: These heaters are field convertible from a standard power vent configuration to separated combustion. This flexibility allows them to adapt to a variety of installation environments and building requirements. 
  • Energy Efficient: Many UDXC models feature 82% to 83% thermal efficiency and incorporate a TCORE2 titanium-stabilized aluminized steel heat exchanger. These features help maximize heat transfer while reducing wasted energy. 
  • Low-Noise Operation: UDXC unit heaters use vibration-isolated propeller fans and venter motors to minimize operating noise. This design helps maintain a more comfortable environment in occupied spaces. 
  • Ideal for Extreme Cold Weather Temperatures: Available capacities up to 400,000 BTU allow UDXC heaters to deliver substantial heating output in large or demanding environments. They are certified for commercial, industrial, and many residential heating applications where consistent warmth is required during cold conditions.

Overall, Reznor UDXC unit heaters combine proven reliability, installation flexibility, energy-efficient performance, quiet operation, and the heating capacity needed for demanding cold-weather environments. These advantages make UDXC heaters a practical option for buyers seeking reliable heating across a wide range of applications.

Which spaces are ideal for Reznor UDXC unit heaters?

Reznor UDXC unit heaters are designed for a range of primary space types that require durable, high-capacity heating such as warehouses, garages, and manufacturing facilities. Their commercial, industrial, and residential certifications allow them to serve a wide variety of large and demanding environments. 

  • Warehouses and Distribution Centers: Warehouses often require high heating capacity to maintain comfortable working conditions across large open floor plans. These facilities benefit from the UDXC's commercial and industrial application certification and broad BTU range. 
  • Garages and Workshops: Reznor UDXC models from 30,000 BTU through 125,000 BTU are approved for residential garages and workshops. Ceiling-mounted installation helps preserve floor space. Vibration- and noise-isolated fan and venter motors support quieter operation. These spaces are also suitable for the unit’s field convertible separated combustion capability. 
  • Manufacturing Facilities: Manufacturing spaces often need consistent heat during daily operations and changing outdoor conditions. The UDXC's field convertible separated combustion capability, durable heat exchanger, and commercial-grade construction make it suitable for these demanding environments.
  • Retail Spaces and Showrooms: Retail buildings and showrooms can use these heaters to maintain comfortable indoor temperatures for customers and employees. Their modern cabinet design helps support installations in visible commercial areas.
  • Sports and Recreational Facilities: Recreational buildings commonly feature high ceilings and large open areas that require substantial heating capacity. These heaters are available in multiple sizes to match varying facility requirements.
  • Transportation Facilities: Transportation centers, maintenance buildings, and service facilities can benefit from the UDXC's flexible installation options and high-output heating performance. Field-convertible separated combustion capability can also support challenging installation environments.

Choosing the proper heater size depends on building dimensions, insulation levels, ceiling height, and climate conditions. Matching the BTU capacity to the space helps maximize comfort, efficiency, and overall performance.

What features matter most when buying Reznor UDXC unit heaters?

Reznor UDXC unit heaters include several standout features that directly affect installation flexibility, durability, serviceability, and long-term performance. These features help distinguish the UDXC series from many standard gas-fired unit heaters. 

  • Separated Combustion Convertible: Reznor UDXC units are field convertible to separated combustion with an approved kit. This allows the heater to draw combustion air from outside the building, helping isolate the combustion process from indoor dust, fumes, and pressure changes for more reliable operation in garages, workshops, and other demanding environments.
  • TCORE2 Heat Exchanger: The UDXC series uses a TCORE2 titanium-stabilized aluminized steel heat exchanger. This design is engineered for durability and efficient heat transfer in demanding heating applications.
  • Powder Coated Cabinet: UDXC heaters feature a two-tone black and white powder-coated cabinet with a scratch-resistant finish. The durable coating helps maintain appearance and protect the unit in commercial and industrial environments. 
  • Isolated Fan Motors The axial fan and venter motors are vibration and noise isolated to support quieter operation. Lower operating noise makes the unit more convenient to use in garages, workshops, and other spaces where people may be working nearby.: 
  • Error Code Display: A built-in error code display provides quick troubleshooting information when service is needed. It helps technicians diagnose issues faster and can reduce downtime.
  • Hinged Access Door: The hinged service door includes a quarter-turn latch for simplified access during maintenance and inspection. The door stays attached to the unit during service, making routine maintenance easier while reducing the risk of dropped or misplaced panels.

These features are most valuable when evaluating long-term ownership and ease of installation. Comparing them alongside BTU capacity, fuel type, and application requirements helps identify the best UDXC model for a specific project.

Additional factors to consider when buying Reznor UDXC unit heaters

When buying a Reznor UDXC unit heater, evaluate mounting clearances, fuel type, air throw, thermostat and control compatibility, venting configuration, and gas supply pressure. These considerations help ensure the heater matches the building's heating demands, fuel source, and installation requirements.

  • Mounting Clearances: UDXC heaters must be installed with the proper clearances from walls, ceilings, combustibles, and nearby equipment. Reznor publishes specific clearance requirements in its technical specifications and installation documentation. Maintaining these clearances helps support safe operation, proper airflow, and adequate access for service and maintenance. 
  • Fuel Type: UDXC models are available in both natural gas and propane configurations. The heater must be matched to the available fuel source, although approved conversion kits are available.
  • Air Throw: Air throw distance affects how effectively heated air is distributed throughout the space. Reznor provides throw distance data to help size the heater appropriately for warehouses, workshops, and other large areas.  

  • Thermostat and Controls: Multiple thermostat options are available, including non-programmable, programmable, and smart thermostat models. Selecting the right control system can improve comfort and energy management.

  • Venting Configuration: UDXC units can operate as standard power-vent heaters or be field converted to separated combustion. Vertical and horizontal venting options are available depending on the installation environment.
  • Gas Supply Pressure: Proper gas pressure is essential for safe and efficient operation. Reznor includes gas supply pressure and gas piping requirements within the UDXC technical specifications to ensure compatibility with the building's gas system. 

The most important factors are the ones that determine whether the heater can be installed correctly in the space, particularly fuel type, venting configuration, gas supply pressure, and required clearances. Once those requirements are confirmed, air throw and thermostat options become more important for fine-tuning heat distribution, comfort, and day-to-day operation.

How much do Reznor UDXC unit heaters cost?

Reznor UDXC unit heaters (before longer-term operation and maintenance fees) typically range from about $1,100 to $5,500+, depending on BTU capacity, fuel type, and selected accessories. Total ownership cost is influenced by other primary factors beyond the heater itself. Comparing purchase price alone does not provide a complete picture of ownership cost. Whole-job installation or hourly labor, maintenance, and operating costs are influenced by multiple project-specific factors, making exact pricing difficult to estimate a general practice. For an accurate estimate, consult a qualified local HVAC professional or an HVACDirect.com support professional.

  • Unit Purchase Price: Reznor UDXC unit heaters currently range from about $1,100 to $5,500+ at HVACDirect.com, but prices are subject to change. Larger BTU capacities and specialized configurations typically increase equipment costs. 
  • Installation and Labor: Installation costs vary based on heater size, mounting location, electrical connections, gas piping, and venting requirements. More complex commercial installations generally require additional labor and commissioning time. $100 to $200 per hour may be tacked onto or instead of the whole-job charge for installation.
  • Venting Accessories: HVACDirect.com lists Reznor unit heater accessories from $25 to $650+. Vent kits, concentric vent systems, and separated combustion accessories can add several hundred dollars to the project cost. Vertical and horizontal venting options are available depending on the building layout and installation requirements.
  • Fuel Consumption and Operation: Operating costs depend on the heater's BTU input, runtime, fuel type, and local utility rates and ranges can be highly variable. UDXC models are designed with thermal efficiency ratings of approximately 82% to 83% to help maximize usable heat output for less energy cost.
  • Maintenance: Long-term ownership costs can range between any two numbers simply for annual inspections, routine maintenance, and occasional component replacement. Associated fees for regular servicing are investments to maintain efficiency, reliability, and equipment longevity.

Evaluating installation needs, venting accessories, fuel usage, and maintenance requirements will provide a more accurate budget for a Reznor UDXC heating project. Before finalizing the project budget, homeowners and facility managers should also account for any required local permits and inspections. HVAC or mechanical permits are variable, although fees may be lower or higher depending on the location and project scope. Gas, electrical, and inspection fees may also apply. Confirm local requirements before budgeting the project.

Why buy Reznor UDXC unit heaters from HVACDirect.com?

HVACDirect.com offers several distinct advantages, including a lower price guarantee and expert HVAC support, that help customers purchase Reznor UDXC unit heaters with confidence. From competitive pricing to long-term technical support, these benefits help simplify the buying and ownership experience. 

  • Buy Direct and Save: HVACDirect.com sells Reznor UDXC unit heaters at discounted pricing compared to listed retail prices. Customers can also take advantage of the company's Lowest Price Guarantee program for additional value. 
  • Fast Nationwide Shipping: Many Reznor UDXC models are listed as in stock and ready to ship. This helps reduce project delays for residential, commercial, and industrial heating applications.
  • Customizations You Won't Find Anywhere Else: Customers can configure venting kits, separated combustion options, thermostats, mounting accessories, air deflectors, and other application-specific components during the ordering process. These options help tailor the heater to the installation. 
  • Expert HVAC Support: HVACDirect.com provides product guidance and technical assistance before and after the sale. This support helps customers select the proper Reznor UDXC model and accessories for their heating requirements. Our technicians have years of HVAC industry experience and can help guide product selection and installation planning.
  • Available Parts and Tech Support: Reznor UDXC heaters are backed by available replacement parts, technical documentation, and ongoing support resources. This helps simplify maintenance and supports long-term equipment ownership.

These advantages can provide meaningful value beyond the equipment itself. These benefits help simplify the purchase, installation, and long-term ownership of Reznor UDXC unit heaters.

Recent Information Articles

Outdoor heat pump with light frost, water vapor and meltwater
Heat Pump Defrost Cycle: What Is Normal and What Needs Service?
Learn what a normal heat-pump defrost cycle looks like, why frost forms, which symptoms need service, and what homeowners can check safely.
Read more about Heat Pump Defrost Cycle: What Is Normal and What Needs Service?
October 26, 2026
Insulated copper refrigerant line set with capped ends
Should You Replace the Line Set When Installing a New AC or Heat Pump?
Learn when to replace a refrigerant line set with new AC or heat-pump equipment, what can permit reuse, and how size, condition, refrigerant, and access affect the decision.
Read more about Should You Replace the Line Set When Installing a New AC or Heat Pump?
October 23, 2026
Compact furnace cabinet inside a manufactured-home utility closet
Mobile-Home Furnace Replacement: What Makes Equipment Different?
Plan a mobile-home furnace replacement with checks for manufactured-home approval, cabinet fit, downflow connections, gas or electric supply, and cooling compatibility.
Read more about Mobile-Home Furnace Replacement: What Makes Equipment Different?
October 21, 2026
Furnace equipment label being photographed for model identification
How to Read a Furnace Model Number Before Replacement
Find and record your furnace model number, distinguish model and serial information, and confirm fuel, capacity, ductwork and fit before replacement.
Read more about How to Read a Furnace Model Number Before Replacement
October 16, 2026

Call Now and Get a Free Quote Today! 1-800-397-1392

FAQs about Reznor UDXC unit heaters

Yes, Reznor UDXC unit heaters can be used at high altitude when the proper high-altitude components are installed. HVACDirect.com lists multiple Reznor high-altitude pressure switches designed specifically for UDX and UDXC-series heaters operating above 6,000 feet elevation. At elevations above 6,000 feet, Reznor specifies that a pressure switch change is required for compatible heater models. These pressure switches are model specific and are intended to help maintain proper combustion and safe operation under lower air pressure conditions. Before installation, the heater model, elevation, fuel type, and required accessories should be verified against Reznor's specifications.

Reznor UDXC unit heaters are compatible with several 24-volt (V) single-stage thermostat options, including non-programmable, programmable, and smart thermostats. HVACDirect.com specifically offers the ACiQ STN701 non-programmable thermostat and ACiQ STN705 programmable thermostat as compatible accessories for UDXC heaters. The STN701 provides simple temperature control, while the STN705 adds programmable scheduling features.

Yes, one thermostat can control multiple Reznor UDXC unit heaters in many applications if the control wiring and electrical load are designed correctly. The UDXC is a 24V thermostat-controlled heater and supports multiple thermostat and control options for installation flexibility. When several heaters serve the same space, installers may use a single thermostat to command multiple units simultaneously through appropriate control relays or staging arrangements. The exact configuration depends on the number of heaters, their electrical characteristics, and the building's heating requirements. Because control requirements vary by installation, the thermostat capacity and control strategy should be verified before connecting multiple heaters to one control device.

Yes, Reznor UDXC unit heaters can connect to building control systems through their 24V thermostat control circuit. There is an external terminal strip for 24V thermostat wiring, and multiple thermostat and control options are available to customize the installation. This control architecture allows the heaters to integrate with common commercial control strategies that use low-voltage heating commands. UDXC units are frequently applied in commercial and industrial buildings where centralized temperature management is important. The specific integration method depends on the building automation system, control sequence, and number of heaters being managed.

No, the Reznor UDXC unit heaters are single-stage gas-fired unit heaters rather than 2-stage heating models. Their specifications list capacities from 30,000 to 400,000 BTU, along with standard thermostat compatibility, but do not identify two-stage heating as an available feature. Instead, the UDXC line focuses on features such as separated combustion convertibility, TCORE2 heat exchangers, low-noise propeller fans, and thermal efficiency ratings of about 82% to 83%.

Yes, Reznor UDXC unit heaters offer adjustable air distribution options through accessory vertical louvers and downturn nozzle kits. HVACDirect.com lists multiple vertical louver kits specifically designed for UDXC models, allowing airflow to be directed where heat is needed most. Adjustable louvers are especially useful in warehouses, workshops, and other large spaces where heat distribution needs vary. Reznor also offers downturn nozzle accessories that can redirect airflow into a more vertical pattern for improved heat delivery to occupied areas. The available louver and nozzle options depend on the specific UDXC model size.

Reznor UDXC unit heaters include the factory-assembled heater and key internal components needed for operation, but most venting, mounting, and control accessories are selected separately. The heater itself is the included item, while thermostats, vent kits, mounting brackets, and airflow accessories are offered as configurable options. Standard UDXC heaters include features such as the TCORE2 titanium-stabilized aluminized steel heat exchanger, axial propeller fan, sealed control compartment, and power-vented design with field-convertible separated combustion capability. These components are factory installed and designed to support heating performance, durability, and installation flexibility.

Yes, Reznor UDXC unit heaters can be ceiling mounted. UDXC heaters are suitable for ceiling or wall mounting, providing flexibility for commercial, industrial, and residential installations. Ceiling mounting is a common installation method in warehouses, workshops, garages, and manufacturing facilities because it helps keep floor and wall space unobstructed. Reznor also offers optional louvers and downturn nozzles that can help direct heated air toward occupied areas from an overhead installation. Proper mounting height, clearances, and support requirements must follow Reznor's installation specifications.

Reznor UDXC unit heaters are designed to last 15 to 20 years and include warranty coverage of up to 10 years on major heat exchanger components. The UDXC series uses a TCORE2 titanium-stabilized aluminized steel heat exchanger that is engineered for durability in residential, commercial, and industrial applications. Reznor's warranty documentation provides an extended 10-year non-prorated warranty on the heat exchanger, burner, and flue collection box assembly for UDXC models. This level of coverage reflects the manufacturer's confidence in the durability of these core components. Actual service life depends on installation quality, operating conditions, maintenance practices, and usage patterns.

Reznor UDXC unit heaters are designed for rapid space heating with capacities ranging from 30,000 BTU to 400,000 BTU and airflow ratings from 456 CFM to more than 5,100 CFM. Their axial propeller fan design helps distribute heated air quickly across garages, warehouses, workshops, and other large areas. Heating speed depends on the heater's BTU output, airflow capacity, building size, insulation level, and outdoor temperature. Larger UDXC models can warm large commercial and industrial spaces more rapidly than smaller units. For the fastest results, the heater should be properly sized for the application using Reznor's heating and air throw specifications.

Yes, Reznor UDXC unit heaters can operate from backup power when the generator or backup system supplies the required electrical service. HVACDirect.com specifications list UDXC models as 115V, single-phase units that use electrical power for controls, ignition, and fan operation. Because these are gas-fired heaters with electrical components, they will not operate during a power outage unless an alternate power source is available. A properly sized standby generator or backup power system would be needed in order to supply the electricity needed for the Reznor UDXC's controls and blower motor. The backup power system must be properly sized for the heater's electrical requirements.

blockboard tech