The diffuser enables the exhaust air to flow out without loss, resulting in an increase in the air flow of up to 15%. This means an energy saving of up to 15%.


  • Improved air mixture with the outside air
  • Any penetrating rainwater is drained out between the diffuser and exhaust air duct
  • DLG-tested system (DLG test report 4895)

Colours: Light grey, brown

The diffuser can be used in combination with a cover flap, which closes the chimney when the fan is not running. Alternatively, a rain hood can be used as a chimney closure.


Infosheet Download

DLG test report Download

Suitable for

  • DLG 2000