Autoterm Air 9D Diesel Heater

8kW Diesel Parking Heater for Large Cabins and Work Vehicles

Keep large vehicle cabins, workspaces, and marine interiors warm with powerful air heating built for demanding use. The Autoterm Air 9D delivers up to 27,300 BTU/hr (8 kW) of heat output, 243 CFM (413 m3/h) of heated airflow, and diesel or HVO100 fuel compatibility.

Benefits & Use Cases

The Autoterm Air 9D is designed for applications that need more heating capacity than a compact camper heater can provide. It is a strong fit for trucks, buses, off-highway equipment, and boats or yachts where large air volume and dependable diesel operation matter.

• High 27,300 BTU/hr (8 kW) output helps warm larger cabins and work areas quickly
• Low setting provides 10,900 BTU/hr (3.2 kW) for maintained comfort after warm-up
• Compatible with diesel EN590 and HVO100 EN15940 for flexible fuel planning
• Designed for trucks, buses, off-highway vehicles, boats, and yachts

Technical

• Fuel Type: Diesel EN590 or HVO100 EN15940
• Voltage: 12V or 24V
• Heating Medium: Air
• Heat Output: 27,300 BTU/hr (8 kW) high;  10,900 BTU/hr (3.2 kW) low
• Heated Air Volume: 243 CFM (413 m3/h) high; 41 CFM (70 m3/h) low
• Fuel Consumption: 0.26 gal/h (1.00 L/h) high; 0.11 gal/h (0.42 L/h) low
• Power Consumption: 290 W on 12V high; 210 W on 24V high; 12 W low
• Max Altitude: 5,249 ft (1,600 m) above sea level
• Warranty: 24-month manufacturer's warranty
• Dimensions: 25.6 × 8.3 × 11.1 in (650 × 212 × 281 mm)
• Heater Weight: 28.2 lb (12.8 kg)
• Set Weight: 39.7 lb (18 kg)
• Certifications: 122R and 10R certificates

Part numbers:

• 12V Heater unit only: assy 4796 
• 24V Heater unit only: assy 4791

Browse AUTOTERM Manuals & Technical Documentation

Vehicle Compatibility

• Truck cabins and larger sleeper spaces
• Buses and passenger transport vehicles
• Off-highway, construction, and agricultural machinery
• Boats, yachts, and larger marine interiors
• Large vehicle cabins or workspaces that need high-output air heating

Kit Includes

• Power supply wiring, 1 piece for 12V version
• Fuel pump, 1 piece for 24V version
• Nylon fuel line, 7 ft (2 m)
• Fuel stand pipe, 1 piece
• Clamp for fuel pump, 1 piece
• Exhaust pipe, 2 ft (0.60 m)
• Air intake pipe with silencer, 1 piece
• Control panel wire, 1 piece

FAQs

What vehicles is the Autoterm Air 9D best for?
The Air 9D is best for larger spaces such as truck cabins, buses, off-highway machinery, and boats or yachts. Its 27,300 BTU/hr (8 kW) output is built for applications that need strong air heating.

Can I use the Air 9D in a boat or yacht?
Yes, this heater is listed for boats and yachts, provided the installation follows marine safety requirements for combustion air, exhaust routing, fuel delivery, and ventilation.

How much fuel does the Autoterm Air 9D use?
Fuel consumption ranges from 0.11 gal/h (0.42 L/h) on low to 0.26 gal/h (1.00 L/h) on high. Actual use depends on cabin size, insulation, weather, and how long the heater runs at full output.

Is the Air 9D suitable for high-altitude use?
The listed maximum work altitude is 5,249 ft (1,600 m) above sea level. For regular mountain travel above that range, choose a heater setup designed for higher altitude operation.