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Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible

Name: Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible
Brand: Reznor
SKU: UDXC-400
Price: 3495.0 USD
Availability: InStock
Rating: 5 (6 reviews)

By Reznor | SKU: UDXC-400 | ID: 900014

✓ No Sales Tax - in most states excluding California
✓ Manufacturer Warranty Included
✓ Satisfaction Guarantee - or return within 30 Days
✓ Most Products In Stock - Call or Text (833) 658-3387 for availability

$3,495.00 + FREE SHIPPING

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Product Details

Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible

The Reznor UDXC-400 Gas-Fired Unit Heater delivers dependable, high-capacity heating for expansive industrial, commercial, and residential environments. Outfitted with Reznor’s TCORE2® heat exchanger—crafted from titanium-stabilized aluminized steel—this unit ensures exceptional performance, longevity, and energy efficiency.

Built with durability and aesthetics in mind, the UDXC-400 features a tough two-tone, scratch-resistant finish, rounded corners, and hidden fasteners. Its clean design makes it a versatile solution for large garages, workshops, factories, or warehouses.

Included:

Reznor UDXC-400 400,000 BTU Low Static Axial Fan Convertible Gas-Fired Unit Heater

Key Features:

400,000 BTU heating capacity
Axial propeller fan ideal for low static pressure environments
82–83% AFUE efficiency for optimal energy use
Field convertible to separated combustion for flexible venting options
Sealed control compartment protects critical electrical components
TCORE2® heat exchanger constructed from titanium-stabilized aluminized steel
Vibration and noise-isolated fan and venter motors
Certified for commercial and industrial applications

Product Note:

Replaces previous models UDX400 and UDZ400

View More Gas Fired Heater Units

Specifications

Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible

Brand	Reznor	SKU	UDXC-400
Weight (in lbs)	360	Manufacturer	Reznor
Replaces	UDX400 and UDZ400	Furnace Efficiency / AFUE	80-85%
Heating BTU	400,000 BTU	Maximum CFM	5123
Decibel Level (dBA)	62	Motor RPM	1050 Fan motor speed
Horsepower	1/2 - Totally-enclosed fan motor horsepower	Flue Outlet	6"
Watt	1086	Efficiency	83%
Electrical	115 Volt 1 Phase 60 Hertz	Phase	Single Phase
Amperage Requirement	11.0	Operating Mode	Heating
Connection	3/4" NG/LP Connection to Gas Valve	Fuel Type	Natural Gas
Height	34 1/8"	Width	41"
Depth	48 29/32"	Warranty	9 Year Heat Exchanger, Burner, and Flue Collection Box Assembly; 4 Year All Electrical and Mechanical Components

Warranty

Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible

Coverage	9 Years	4 Years
Warranty	Heat Exchanger, Burner, and Flue Collection Box Assembly	All Electrical and Mechanical Components

Documents

Reznor 400,000 BTU Gas-Fired Unit Heater Low Static Axial Fan Convertible

Reznor UDXC Gas-Fired Catalog

Reznor UDXC Brochure

Reznor UDXC Technical Specifications

Reznor UDXC Installation and Maintenance Manual

Reznor UDXC Replacement Parts

Reznor UDXC Warranty

Shipping

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Reviews

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Our Real Customer Reviews

See what our customers have said about us.

Impressed by the quality

I’ve installed Goodman heat pumps before at a similar price point. This was better quality, and a great deal from the HVAC store. I’m always a little nervous about picking the lowest cost provider but the came through quick and no damage.

I’m in the middle of install so if you don’t see an update, things went well. As I said, first impressions as I opened it up to adjust airflow direction was very impressed!

A good store to shop for HVAC supply

The store did some things I didn't believe the manager was very helpful in fixing my problem

Perfect

Great communication and great price

very reliable company and great prices

Bought a few units from this company and they were very friendly and easy to work with. Either matched prices or beat the price and had fast shipping also.

Excellent company to purchase from

I wasn’t to sure about if this company could deliver it quickly but it arrived within a week. No issues. I needed this one for parts as my first one that I installed a year ago had the ecm go out on the blower fan. Parts are hard to come by for this Chinese brand. I think the ecm went out due to condensation in the main supply plenum dripping onto fan motor. I do like this ac unit but hope the fan lasts longer than a year. I covered the fan ecm with flex seal tape.

Goodman 5 Ton System

Excellent value, customer sales support (a human called to confirm online order... greatly appreciated!), fast shipping. Very happy customer.

A + Company

Great price, communication and service I will be buying another furnace from them Fantastic !

Sale representative Lopez was very experienced and professional. I would recommend this company to any one and I am looking forward to work with Lopez again.