THE BT400-NEX-D
Portable Indirect Diesel Fired Herman Nelson Heater
Temperature range 150 °F – 250 °F
The BT400 NEX-D is the industry’s go-to diesel-powered indirect-fired heater—delivering 400,000 BTU/h of clean, dependable heat wherever you need it. Powered by a rugged Kubota diesel engine, this stand-alone unit requires no external power source, making it ideal for remote sites, aircraft operations, and extreme winter conditions.
Built with a high-efficiency stainless steel heat exchanger, the BT400 NEX-D safely exhausts all combustion gases through the stack, supplying 100% clean, breathable air to your aircraft cabin, engines, worksites, tents, or buildings. It’s engineered to perform in temperatures below –40 °F/°C, ensuring reliable operation even in the harshest environments.
For indoor operations, the BT400 NEX-D is fully certified for indoor use when the exhaust is vented outside. This transforms the unit into a powerful 400,000 BTU portable furnace—with electronic temperature control delivering consistent, precise heat for mission-critical operations.
Whether you work in aviation, construction, exploration, or remote industrial sites, the BT400 NEX-D provides the performance, safety, and durability trusted worldwide.
Features & Benefits
POWERFUL
- Kubota OC60 Tier4 Diesel - Electric Start
- 400,000 BTU/h
- Max Output Temp: 250 °F (121.1 °C)
- Run Time: 14 Hours
SAFETY
- Indirect flame technology produces heat that can be safely ducted into tents, buildings and more
- Easily Accessible Emergency Shut Down Button
- Certified for Indoor Use
- Electric Temperature Controlled
- Manual Break Handle
EASY TO USE
- Electric Ignition
- Stand-Alone
- Towable
- Single Person can move it
APPLICATIONS
- Heating for aircraft cabins
- Heating Cockpits
- Heating Fluid Lines
- Heating Luggage Bay
- Heating Electronics Bay
- Hangar Heating
- Aircraft de-icing support
- ice melting applications
- Moisture drying
| Heating Capacity | 400,000 BTU/h |
| Maximum Air Delivery Rate | 2,100 CFM |
| Max Output Temp | 250 °F (121.1 °C) |
| Fuel Capacity | 35 U.S. Gallons (132.49 L) |
| Fuel Type | JP4, JP5, JP8 Aircraft Turbine Fuel DF-2 diesel fuel |
| Maximum Fuel Consumption | 3.6 GPH @ Full Output |
| Nozzle | 2.0 GPH 60° |
| Static Pressure | 0.65" w.c. |
| Ignition | Electric |
| Ductability | 30 ft Discharge |
| Engine | Kubota OC60 Tier4 Diesel - Electric Start |
| Outlet Duct | 1 x 12" Diameter Outlet |
| Run Time | 14 Hours |
| Electrical | 12 VDC 20A |
| Approval | O-TL |
| Efficiency | >83% |
| Hitch Setup | Pintle |
| Certification | O-TL |
| Weight (dry with trailer) | 745 lb (338 kg) |
| Dimensions | 71” L x 50” W x 48” H |
TESTIMONIAL
“Our customers’ expectation of zero defects demands laser focus from our suppliers. Aerotech Herman Nelson is one of those companies we depend on for products and services that meet our commitment to excellence. In 2014, Aerotech Herman Nelson has successfully demonstrated its commitment to excellence with “100% quality and on-time delivery” to Lockheed Martin Aeronautics. Your superior performance and commitment to meet customer expectations is only made possible when all of us perform with excellence.”
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BT400-NEX SERIES EXECUTIVE SUMMARY
Construction Site Heaters, Aircraft Engine Preheaters, Indirect Diesel & Gas Heater
The BT400-NEX Series of indirect fired heaters are used in commercial aviation, construction and exploration. In these industries, safety is not just a concern but is a requirement for any manufacturer producing a modern heater.
Click below and download our Executive Summary and learn why the BT400-NEX Series of heaters are the number 1 choice of so many industries.
