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Wacker Neuson HI400HD


Portable, durable and versatile for all heating applications

HI400HD portable indirect fired air heaters produce clean, dry, healthy heat offering an ideal environment for a variety of construction, residential and restoration applications without the use of an open flame, combustion carbons or water. Available in Diesel or Natural Gas/Propane, the HI400HD can handle various heating and drying applications at over 85% efficiency due to dedicated 2nd blower for combustion; one of the highest in the industry! Large pneumatic tires mean easy positioning on jobsites. The HI400HD is CSA approved.

  • The HI400HD comes standard with -40 degree F/C cold weather kit and robust design that features lifting bail, fork pockets and adjustable handle.
  • Diesel model features 2 stage burner with low-fire setting for fuel savings during low heat demand.
  • Adjustable ball valve on Natural Gas/Propane model allows flexibility to switch from Natural Gas to Propane with ease and includes safety locking device to keep valve from moving once set.
  • Burner head and gas pipe assembly are made from 100% stainless steel for long life.
  • Optional 4" burner supply air duct allows warm air from outlet to preheat combustion air for increased cold weather performance and higher efficiency.



  HI400HD D HI400HD G


L x W x H Overall in 84.6 x 34 x 53.3 81.2 x 33.9 x 48.8
L x W x H Shipping in 85.8 x 29.1 x 51.8 85.8 x 29.1 x 49.6
Weight Dry lb 456 430
Operating weight with Fuel lb 860  

Operating data 

Diameter Flue in 6 6
Diameter Air Outlets (Qty 1) in 20 20
Diameter Air Outlets (Qty 2) in 16 16
Diameter Air Outlets (Qty 3) in 12 12
Heating power Heat Input BTU/h 408,569.6 380,548
Heat efficiency  % 84 86
Operating temperature Heat Rise ° F 126 131
Capacity Sizing Air Heat ft³ 583,538 548,330
Capacity Drying Size ft³ 195,007 195,007
Runtime  h 19.2  
Air flow  CFM 3,760 3,250
Static Pressure  W.C. (inch) 0.5 0.5
Length Max Duct 1 x 20in Supply ft 100 100
Length Max Duct 2 x 16in Supply ft 50 50
Length Max Duct 3 x 12in Supply ft 25 25
Length Max Duct 1 x 20in Return ft 25 25

Electrical system 

Frequency  Hz 60 60
Voltage  V 120 120
Current  A 15 15

Engine / Motor 

Fuel type  Diesel #2 NG/LP
Tank capacity Fuel US gal 57.1  
Fuel consumption Diesel/LP US gal/h 2.96 3.65