1 (800) 486-4328 // 1 (204) 633-1999
Aerotech Herman Nelson Heaters Intl. Inc.

Temperature range 150 °F – 250 °F

This indirect-fired heater is engineered for extreme cold, operating reliably in temperatures as low as –40 °F/°C and below. With a 250 °F (121 °C) temperature rise, the BT400NEX-G can deliver 250 °F outlet air even when the ambient temperature is –40 °F.

Powered by a Honda 5.5 HP gasoline engine, this Herman Nelson indirect heater is regarded as one of the most dependable units in the industry—trusted by both the U.S. and Canadian military as well as major airlines around the world.

Manufactured in Canada, the BT400NEX-G is built to withstand brutal northern winters. It has been in continuous production since 1973, with ongoing engineering improvements. In 2010, the original Herman Nelson design was upgraded with full electronic temperature control and electronically actuated valves, making it easier to operate, more reliable, and more economical to maintain.

The BT400NEX-G is O-TL certified to UL 733-1993 (to CSA standards).

Certified by O-TL to UL 733-1993 (To CSA Standards)

Features & Benefits

POWERFUL

SAFETY

EASY TO USE

APPLICATIONS

Heating Capacity 400,000 BTU/h
Maximum Air Delivery Rate 2,100 CFM
Max Output Temp 250 °F (121.1 °C)
Fuel Capacity 16 U.S. Gallons (60.56 L) (132.49 L)
Fuel Type Gasoline
Maximum Fuel Consumption 3.4 GPH @ Full Output
Nozzle 2.5 GPH 45°
Static Pressure 0.65" w.c.
Ignition Electric
Ductability 30 ft Discharge
Engine Honda GX160 Gasoline - Electric Start
Outlet Duct 1 x 12" Diameter Outlet
Run Time 8 Hours
Electrical 12 VDC 20A
Approval O-TL
Efficiency >83%
Hitch Setup Pintle
Certification O-TL
Weight (dry without trailer) 355 lb (161 kg)
Weight (dry with trailer) 526 lb (238 kg)
Dimensions 52” L x 21” W x 27”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.

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2025 - 2026 Holiday Business Hours

Happy holidays
  • December 24
    Open 8:00 AM – 12:00 PM CDT
  • December 25
    Closed
  • December 26
    Closed
  • December 29
    Open 8:00 AM – 4:30 PM CDT
  • December 30
    Open 8:00 AM – 4:30 PM CDT
  • December 31
    Open 8:00 AM – 12:00 PM CDT
  • January 1
    Closed
  • January 2
    Open 8:00 AM – 4:30 PM CDT

Need immediate assistance while we’re closed?
Call (204) 995-2999.

Otherwise, contact us during business hours:
1 (800) 486-4328  //  1 (204) 633-1999
Sales@hermannelson.com

Regular Business Hours: Monday – Friday, 8:00 AM – 4:30 PM CDT

Your operations don’t stop — neither do we. See you in the new year.

HERMAN NELSON BT400 NEX-G

MAINTENANCE
PACAKGE

With our package, you can have peace of mind knowing your equipment is in good hands. We have years of experience working with the Herman Nelson BT400 NEX-G and we’re committed to helping you keep your equipment running smoothly.

Indirect Fired Heater Manufacturer

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