This range of commercial sectional condensing heat exchangers is available in capacities of 80 kW to 360 kW. The WTB® heat exchanger is extremely reliable with a proven lifetime in the field for more than 15 years. 

The WTB® heat exchanger is compact resulting in a small footprint. It features a fully water cooled combustion chamber that requires no ceramic insulation. 


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  • Condensing floor standing boilers for central heating
  • Commercial
  • Industrial


  • Modular flexibility within capacity range
  • A complete heat solution with our Aconit® burner
  • No ceramic insulation required
  • Light weight and small footprint
  • Easy maintenance