Wood-Oil twinning

Wood-Oil twinning

Wood burning MC + Oil boiler Optitherm or any brand

2 fuels : Wood + Oil

Natural draught wood burning boiler
From 20 to 40 kW
Frequently installed without an accumulator tank

If PERGE oil boiler :
Oil boiler
24 and 32 kW
Heating only or Heating and DHW

Flue connection in 1 or 2 chimneys

Choose in freedom : at the first installation or with an existing boiler

The twinning of a wood burning boiler and an oil boiler may be done at the first installation or later, for example in the case of an existing oil boiler already installed.

The boilers may be connected into the same chimney or into 2 seperate chimneys.

Thanks to the twinning kit, the wood burning boiler and the oil boiler can be connected into the same chimney, as it controls that they do not work simultaneously.

Furthermore, the twinning kit ensures the following functions :

• The wood burning boiler is always prioritary. When the wood burning boiler works, it automaticly stops the oil boiler.
• In case of lack of wood, the oil boiler takes over automatically.

A wood burner in an oil boiler

The wood burning boiler works as a wood burner in the oil boiler. All services previously provided by the oil boiler are done the same way by the wood burning boiler (i.e. : domestic hot water, under floor heating systel, radiators,...)

The heating installation is not modified. No work inside the house is required. All work is done in the boiler room.

Examples of installations

Wood burning PERGE MC boiler with or wihout an accumulator tank + PERGE Optitherm oil boiler

raccordement chaudière fioul avec chaudière bois


kit raccordement avec ballon tampon

The twinning of two PERGE boilers, a MC wood burning boiler and an Optitherm oil boiler, allows to get the full benefits of PERGE hydraulic original design particularly well suited for energy combinations.

Wood burning PERGE MC boiler with or without an accumulator tank + any brand oil boiler

kit couplage bois fioul toute marque

kit raccordement avec ballon tampon et fioul toute marque



Manufacturer requirements

  • Chimney installations and Ventilation should conform to requirements of the Building Regulations and any approved local laws and all subsequent standards referred to.
  • A flue draught of between 13 and 18 Pa is required when running at rated output.
    Additional flue pull shall require a draught stabiliser to be fitted to prevent over-firing.
  • Any pressurised system must have a sufficiently sized expansion vessel and a suitable PRV. In addition the integral anti-boiling quench coil must be connected to a suitable mechanisal safety valve.


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