Airflow balancing, adjustment and measurement unit. Accurate airflow measurement. Minimised sound generation. Classification of casing leakage EN 1751 class C.

Three models: - Shut-off, adjustment, balancing or control damper - Adjustment, balancing or control damper - Adjustment, balancing or control damper with perforated blade Casing leakage classification: EN 1751, Class C.

Shut-off, adjustment, balancing, adjustment or control damper with opposed blade construction. Tightness in closed position fulfills EN 1751 class 1 requirements.

Shut-off, adjustment, balancing or control damper with opposed blade construction. Tightness in closed position fulfills EN 1751 class 2 requirements.

Shut-off and balancing damper for outdoor air intake and exhaust air with opposed blade design. Damper blades comprise thermal insulation. Tightness in closed position fulfills EN 1751 class 4 requirements.