CU2/B-L500 - Battery assembly of max. 4 individual dampers

The CU2/B-L500 damper is a battery assembly of several CU2-L500 dampers with maximum 4 individual dampers (B12, B21 or B22). This version ensures that the damper blade doesn't exceed the casing at the wall side (up to a height of 500 mm).


  • Large dimensions
  • Battery assembly tested in rigid wall


  • Tested according to EN 1366-2 up to 500 Pa
  • Suitable for installation in rigid wall
  • Maintenance-free
  • For indoor use
  • Suitable for built-in installation
  • Intermediate dimensions on request


  1. Individual damper with PG25 flange and connection pieces in Promatect
  2. EPDM foam
  3. Connection piece
  4. Central plate (B22)