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Eberspacher Airtronic D4 Diesel Motorhome Cabin Heater 4Kw - 12V

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A compact and economical heater.

Extend the camping and outdoor season as long as you like! No matter where you are and whatever the weather: your Eberspächer pre-heater will make sure without complications that you have a warm and cosy passenger compartment.

The Airtronic D4 is a more powerful version of the D2 for larger scale heating enviroments whilst only being slightly larger offers optimised fuel efficiency, a range of operation modes and unsurpassed safety standards.


*Ducting kit included*

*Standard controller included*



  • Factory assembled components for easy ”Plug in Play” installation
  • Full range of ducting accessories including windscreen demisters
  • Electronic speed control with gentle adjustment
  • Fully electronic microprocessor control with continuous monitoring
  • Fan function possible for air circulation
  • Diagnostic system for easy fault finding by our service dealers
  • Low power and fuel consumption
  • Includes standard controller (801 series) that can do the following:
  • Ambient and set point temperatures
  • Built in room sensor
  • System diagnostics



  • Voltage: 12V
  • Heat Settings: Power, High, Medium, Low
  • Heat Flow: Power: 4000W High: 3000W Medium: 2000W Low: 1000W
  • Electrical Power: Power: 40W High: 24W Medium: 13W Low: 7W
  • Consumption: Power: 3.33 Amps High: 2.0 Amps Medium: 1.08 Amps Low: 0.58 Amps
  • Fuel Consumption: Power: 0.51 l/h High: 0.38 l/h Medium: 0.25 l/h Low: 0.11 l/h
  • Dimensions (LxWxH): 371x150x140
  • Weight: 4.5 kg


How an Eberspächer air heater works:

The heater is supplied with fuel directly from the boat's tank. The fan of the heater draw fresh air in and blows the heated air into the cabin. In summer the fan can be used for fresh air supply only without heating. They draw in cool room or outside air, heat this up and then deliver it to the interior of the vehicle.

Air heaters are an excellent solution for commercial vehicles of every type. They can be installed just as well in the cab as in the luggage compartment or under the floor.

Scientists have found that one feels best at an ambient temperature of 22°C and a relative humidity of 60%. In addition to this comfort range according to DIN 1946, a minimum fresh air rate of 20 m3 (non-smokers) or 20 m3 (smokers) per person and hour is required. Optimum wellbeing on board is guaranteed with Eberspächer air heaters. Our sophisticated heaters delivery exactly the right amount of heat. And solutions such as the D5L C bring it to an impressive 233 m3 of air per hour.



  • Inlet-outlet 80mm non-closable-rotatable x 1
  • Inlet air guard x 1
  • D4 Plus Airtronic heater complete (12VDC) x 1
  • Heater duct hood for 80mm ducting x 1
  • Ducting 80mm x 3
  • Fuel standpipe — fuel pick-up —600mm long x 1
  • Fuel line-clear x 6m
  • Fuel line connector — 5mm x 3mm (50mm) x 2
  • Hose clip — 9mm x 4
  • Fuel line-black x 2m
  • Fuel line connector — 3.5mm x 3mm (50mm) x 2
  • Hose clip — 11mm x 4
  • Floor mounting plate with mounting nuts/washers x 1
  • Inlet-outlet 80mm non-closable-rotatable x 1
  • Hose clips for 80mm ducting x 2
  • Combustion air tube, silencer (0.5m) x 1
  • Clip for combustion air tube x 2
  • Duct hose clip, 20-32mm-for combustion air tube x 1
  • Exhaust pipe — 24mm ID x 0.5m
  • Exhaust pipe — 24mm ID x 0.5m
  • Exhaust muffler x 1
  • Exhaust clamps x 3
  • Exhaust safety end cap 801 or 701 series controller and 6m loom x 1
  • Please note- ordered separately - not included in kit
  • Fuel dosing pump x 1
  • Fuel dosing pump holder-rubber x 1
  • Bracket — Angle for Fuel Meter Pump x 1
  • Wiring loom complete with fuses x 1
  • Fuel dosing pump loom 6m Cable x 1
  • Ties for General Installation x 10
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