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Combined heating with wood and pellets

DuoWIN
 

4 - 30 kW
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DuoWIN - Hybrid technology

Combined heating with wood and pellets

The DuoWIN offers an intelligent combination of the heating benefits of two biomass technologies. This hybrid boiler unites inexpensive split-log heating with the convenience of heating with pellets in a single device. For a quick blast of extra warmth, the PowerBoost function sees the split log and pellet units heat up at the same time for an output of up to 56 kW. With the DuoWIN, pellets can either be fed in manually or automatically. What’s more, the DuoWIN pellet unit can even be retrofitted further down the line with the pellet-ready model of the LogWIN Klassik split-log gasification boiler.

Boiler design

Individual pellet feed X

The DuoWIN may be equipped with either a manual or a fully automated pellet feed system.

Intelligent fuel changeover X

The hybrid boiler's automatic fuel changeover detects whether the wood gasification boiler is in burnout. If too little energy is available in the boiler or the heat accumulator, the system changes to using pellets either automatically or after an individually adjustable period of time.

More power or more efficiency X

The DuoWIN is available in either a comfort-optimised or an energy-optimised version: With the PowerBoost function, high power of up to 56 kW can be provided at short notice. Thanks to EnergySaver, the DuoWIN runs up to 25 per cent more efficiently in pellet mode than conventional combination boilers.

Two separate heat exchangers X

The two independent heat exchanger systems guarantee the highest possible levels of reliability. Neither the wood combustion chamber nor the stainless steel pellet burner are wearing parts, and both are included in the guarantee.

Automatic ignition X

The ignition elements of the DuoWIN are absolutely silent, very robust and maintenance-free.

Cogent to the smallest detail
 

  • The hybrid boiler's automatic fuel changeover detects whether the wood gasification boiler is in burnout. If too little energy is available in the boiler or the heat accumulator, the system changes to using pellets either automatically or after an individually adjustable period of time.
     
  • The DuoWIN may be equipped with either a manual or a fully automated pellet feed system.
     
  • The two independent heat exchanger systems guarantee the highest possible levels of reliability. Neither the wood combustion chamber nor the stainless steel pellet burner are wearing parts, and both are included in the guarantee.
     
  • The DuoWIN is available in either a comfort-optimised or an energy-optimised version: With the PowerBoost function, high power of up to 56 kW can be provided at short notice. Thanks to EnergySaver, the DuoWIN runs up to 25 per cent more efficiently in pellet mode than conventional combination boilers.
     
  • The ignition elements of the DuoWIN are absolutely silent, very robust and maintenance-free.

The advantages at a glance

+ Up to 25 per cent more efficient when in pellet mode

+ PowerBoost function for peak power up to 56 kW

+ Pellet ready – pellet unit can be retrofitted

Other boilers

Need more inspiration? Heat efficiently and inexpensively with wood and still enjoy your comfort thanks to the wood gasification boilers from Windhager. See for yourself!

Our wood heating systems at a glance

Pellet storage

Our experience shows that you can convert from a heating system fuelled by fossil fuels to a BioWIN2 wood pellet boiler in only a matter of days. In the event of an old oil heating system, the oil tank room can be quickly converted into a pellet storage room.

Click here for the pellet storage systems
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DuoWIN


Tailor-made solutions

You can choose between two comfort classes - Premium and Klassik - depending on the level of comfort and convenience you require. Each of these comfort classes is offered in 4 power levels.

Type Premium Klassik
Pellet loading fully automated by hand (daily use container 107 kg)
Heating surface cleaning    
Wood semi-automated semi-automated
Pellets Fully automated Fully automated
Ash removal    
Wood attachable ash trap (by hand) attachable ash trap (by hand)
Pellets ash trap (fully automated) ash trap (fully automated)
Fuel changeover, standard fully automated self-detection fully automated self-detection

Technical data

The DuoWIN is available in a total of four different forms.

Type   DW K18 K(P)15 DW K25 K(P)21 DW K25 K(P)26 DW K 30 K(P)26
Nominal thermal output range          
  Wood kW 15 - 18 15 - 25 15 - 25 15 -30
Pellets kW 4.3 - 15 6.3 - 21 7.6 - 26 7.6 - 26
Boiler efficiency at nominal load          
  Wood % 90.9 90,7** 90,7** 90.5
Pellets % 93.8 93,9** 93,9** 93.9
Filling volume          
  Wood l 145
Pellets l 164 (108*)
Minimum installation dimensions W x D x H           
  Wood mm 588 x 967 x 1340
Pellets mm 714 x 720 (650****) x 1146
Minimum transport weight           
  Wood kg 430
Pellets kg 221 (200****)
Boiler dimensions W x D x H mm 1.393 x 1.100 x 1.492 (1.705*)
Total weight (incl. cladding and attachments)          
  Wood kg 570
Pellets kg 247-283***
Diameter of flue gas tube connection mm 130
Power consumption at nominal load           
  Wood W 43 49** 49** 53
Pellets W 33 41** 48 48
Energy efficiency class   A+ A+ A+ A+

 

* Applies to DuoWIN with fully automatic pellet feed system

** Interpolated from two values

*** Actual weight is dependent on type and may be reduced slightly more during installation by removing flexible parts

****Applies to DW K18 K15 and DW K18 P15