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Combi 4 / Combi 6

The new heating system generation – even more comfortable, compact and economical

Features of the new Combi:
  • Temperature is continuously adjustable using the ergonomic control panel
  • Both the vehicle and the water are heated at the same time in winter operation
  • Only the water is heated in summer operation
  • The unit has a high efficiency level of up to 97% and low gas consumption at the same time
  • Water mixing is improved by the asymmetrical shape of the 10-litre stainless steel boiler, making the water heat more evenly and rapidly, providing longer showering enjoyment without having to adjust the temperature.
  • The heater can also be operated without filling the boiler
  • 4 warm air connections provide optimum warm air distribution via the quiet, powerful fan
  • The automatic, currentless FrostControl safety and drain valve that is included in the scope of delivery opens at 3 °C and therefore prevents the boiler from freezing
  • The compact design provides a high degree of flexibility when selecting an installation site
  • The temperatures in the installation compartment are lower in comparison to the Trumatic C
  • Water, gas and warm air duct connections at the side make servicing easier
  • The innovative microprocessor controller provides additional safety
The new heater is available in four different versions.

Ideal for small to medium-sized motor homes:
  • Combi 4 – with 4000 Watts of heating power
  • Combi 4 E – with 4000 Watts of heating power and integral 1800 Watt heating elements
Ideal for large motor homes:
  • Combi 6 – with 6000 Watts of heating power
  • Combi 6 E – with 6000 Watts of heating power and integral 1800 Watt heating elements


FrostControl safety and drain valve
  • The currentless safety and drain valve automatically empties the boiler via a drain connection if there is a risk of frost (at approx. 3 °C)
  • The drain valve also opens if the pressure is excessively high
  • Draining takes place in stages so that the outlet cannot freeze
  • The drain valve can also be opened manually if required
  • The drain valve cannot be closed until the temperature of the FrostControl is in the frost-free zone again (approx. 7 °C)
  • Currentless operation relieves the strain on the vehicle battery
Truma can supply a heating element as an accessory that heats the FrostControl to approx. 10 °C. The boiler can therefore be filled after a short time, irrespective of the temperature in the installation compartment.

Combi accessories:

The ZUCB time switch can be used to time heating operation up to 7 days in advance.

Tecnical data

Combi 4 / Combi 6
  • Operating pressure: 30 mbar
  • Gas type: Liquid gas (propane/butane)
  • Water capacity: 10 litres
  • Water pressure: max. 2.8 bar
  • Heating time (from 15 °C to 60 °C):
    • Boiler approx. 20 min.
    Heater and boiler approx. 80 min.
  • Rated thermal output:
    • Combi 4: 2000 / 4000 W
    Combi 6: 2000 / 4000 / 6000 W
  • Gas consumption
    • Combi 4 E: 160 – 320 g/hr.
    Combi 6 E: 160 – 480 g/hr.
  • Air delivery volume:
    • Combi 4 max. 287 m³/hr.
    Combi 6 max. 287 m³/hr.
  • Current input at 12 V:
    • Heater + boiler
    Combi 4: from 0.2 A to max. 5.6 A for short periods (Ø 1.1 A)
    Combi 6: from 0.2 A to max. 5.6 A for short periods (Ø 1.3 A)
  • Power required to heat boiler max. 0.4 A
  • Standby current approx. 0.001 A
  • Weight (without water): 14.5 kg
  • Dimensions (LxWxH): 510 x 450 x 300 mm




Combi 4 E / Combi 6 E
  • Operating pressure: 30 mbar
  • Gas type: Liquid gas (propane/butane)
  • Water capacity: 10 litres
  • Water pressure: max. 2.8 bar
  • Heating time (from 15 °C to 60 °C):
    • Boiler approx. 20 min.
    Heater and boiler approx. 80 min.
  • Rated thermal output
    • - Gas operation
    Combi 4 E: 2000 W / 4000 W
    Combi 6 E: 2000 W / 4000 W / 6000 W
    - Electrical operation
    Combi 4 E / Combi 6 E: 900 W / 1800 W
    - Mixed operation (gas and electrical)
    Combi 4 E: max. 3800 W
    Combi 6 E: max. 5800 W
  • Gas consumption
    • Combi 4 E: 160 – 320 g/hr.
    Combi 6 E: 160 – 480 g/hr.
  • Air delivery volume (freely blowing without warm air duct)
    • Combi 4 E: max. 287 m³/hr.
    Combi 6 E: max. 287 m³/hr.
  • Current input at 12 V (heater + boiler)
    • Combi 4 E: 0.2 A to max. 5.6 A for short periods (Ø 1.1 A)
    Combi 6 E: 0.2 A to max. 5.6 A for short periods (Ø 1.3 A)
  • Power required to heat boiler max. 0.4 A
  • Standby current approx. 0.001 A
  • FrostControl heating element (optional): maximum 0.4 A
  • Current input at 230 V: 3.9 A (900 W) or 7.8 A (1800 W)
  • Weight (without water) 15.6 kg
  • Dimensions (LxWxH): 510 x 450 x 300 mm


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Combi 4 (E) / Combi 6 (E)