Ø 80–1000 is made up of a DTU damper with an attached combi motor shelf KOMHY. The damper lacks a knob and has an extended shaft to avoid the need for the knob extender VREDF.
Ø 80–315 meets pressure class C in the closed position.
Ø 400–630 meets pressure class B in the closed position.
Ø 800–1000 meets pressure class A in the closed position.