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Wacker Neuson HI900DGM


HI900DGM Mobile Indirect Fired Air Heaters

The most versatile, robust indirect fired air heaters producing clean, moisture free air for various heating and drying applications. Easy set-up and simple operation make these units extremely user friendly. Boasting up to 878,000 Btu/hr. and up to 6,450 cubic feet per minute, the HI900DGM can operate on diesel, natural gas or propane for maximum job site convenience. These self-contained models feature an on-board 7 kW liquid-cooled generator. All models are CSA certified.

  • 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.
  • Industry leading for heat delivery in its class, boasting 900,000 Btu/hr and up to 6,450 cubic feet per minute, the HI900DGM also features a static pressure gauge, helping maximize heat delivery and avoid output air restrictions.
  • The HI900DGM features a liquid-cooled 7kW Kubota generator for off-grid use as well as a durable stainless steel heat exchanger that comes standard with a 3 year warranty.
  • The unique Recircul-Air design allows adjustable recirculation of warm inside air, while pressurizing with fresh air, resulting in fuel savings and even temperatures.
  • Trailers come fully equipped with choice of surge or electric brakes.



L x W x H Overall 197 x 61 x 100.5 in
L x W x H Shipping 197 x 61 x 100.5 in
Weight without Fuel 4,092 lb
Operating weight with Fuel 4,925 lb

Operating data 

Diameter Flue 8 in
Diameter Air Outlets (qty 2) 20 in
Diameter Air Outlets (qty 2) 16 in
Diameter Air Outlets (qty 4) 12 in
Diameter Air Inlet (qty 2) 20 in
Heating power Heat Input 878,000 BTU/h
Heat efficiency  83 %
Operating temperature Air Temperature Rise 108 ° F
Capacity Sizing Air Heat 1,214,500 ft³
Capacity Drying Size 432,230 ft³
Fuel consumption Burner 6.1 US gal/h
Operating performance Burner 0.25 hp
at rpm Burner 3,450 rpm
Tank capacity Burner Fuel 103 US gal
Runtime Burner (100%) 16.9 h
Runtime Burner (75%) 22.5 h
Engine / Motor type Blower Centrifugal
Power Blower 5 hp
RPM / speed Blower 3,450 rpm
Air flow  6,447 CFM
Static Pressure W.C. 2 W.C. (inch)
Length 2 x 20in Supply ft 200 ft
Length 2 x 16in Supply ft 100 ft
Length 4 x 12in Supply ft 100 ft
Length 2 x 20in Return ft 50 ft

Electrical system 

Engine / Motor type Generator Sawafuji
Engine performance Generator 9.4 kW
RPM / speed Generator 3,600 rpm
Frequency Generator 60 Hz
Voltage Generator 120 V
Current Service 27.1 A
Current Max. 54.2 A
Receptacles 20 Amp 5-20R
Receptacles 30 Amp 2 x L5 , 1 x L6

Engine / Motor 

Engine / Motor type  Z482
Engine / Motor Manufacturer Kubota
Engine performance Engine @ 1800 rpm 10.9 hp
Displacement  29.2 in³
at rpm  3,600 rpm
Fuel type  Diesel
Fuel consumption Useable Fuel 0.69 US gal/h
Runtime w/Genset (100%) 15.2 h