July 4, 2022
July 4, 2022



Rectangular VAV terminal units for the extract air control in buildings with variable air volume systems, demanding acoustic requirements and low airflow velocities

  • Highly effective integral attenuator
  • Optimised for airflow velocities of 0.7 – 7 m/s
  • High control accuracy, even in case of unfavourable upstream conditions
  • Compact construction with rectangular connections on both ends
  • Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
  • Closed blade air leakage to EN 1751, up to class 4
  • Casing leakage to EN 1751, class C

Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type TS for the reduction of air-regenerated noise
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General Information


  • Rectangular VAV terminal units for use in ventilation and air conditioning systems
  • For controlling, restricting or shutting off airflows in extract air systems with low velocities and demanding acoustic requirements
  • Integral attenuator
  • Closed-loop volume flow control using an external power supply
  • For variable or constant volume flow systems
  • Shut-off by means of switching (by others)
  • Can also be used for differential pressure control with suitable control components

Special features

  • Hygiene tested and certified
  • Direct connection to ductwork
  • Factory set-up or programming and aerodynamic function testing
  • Parameters can also later be set on the control component; additional adjustment device may be necessary

Nominal sizes

  • 125, 160, 200, 250, 315


  • TA-Silenzio: Extract air unit
  • TA-Silenzio-D: Extract air unit with acoustic cladding
  • Units with acoustic cladding and/or secondary silencer Type TS for very demanding acoustic requirements
  • Acoustic cladding cannot be retrofitted

Parts and characteristics

  • Ready-to-commission unit which consists of mechanical parts and control components
  • Averaging effective pressure sensor for volume flow rate measurement
  • Damper blade
  • Integral attenuator
  • Factory assembled control components complete with wiring and tubing
  • Aerodynamic functional testing on a special test rig prior to shipping of each unit
  • Set-up data is given on a label or volume flow rate scale affixed to the unit
  • High control accuracy even in case of unfavourable upstream conditions


  • Easy controller: compact unit with potentiometers
  • Compact controller: compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
  • Universal controller: controller, effective pressure transducer and actuators for special applications
  • LABCONTROL: Control components for air management systems

Useful additions

  • Secondary silencer Type TS

Construction features

  • Rectangular casing
  • Replaceable seals
  • Flanges on both ends for the connection to ductwork
  • Position of the damper blade indicated externally at shaft extension
  • Thermal and acoustic insulation (lining)

Materials and surfaces

  • Casing made of galvanised sheet steel
  • Damper blade and effective pressure sensor made of aluminium
  • Lining is mineral wool
  • Plastic plain bearings

Variant with acoustic cladding (-D)

  • Acoustic cladding made of galvanised sheet steel
  • Lining is mineral wool
  • Rubber elements for the insulation of structure-borne noise

Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
  • Faced with glass fibre fabric as a protection against erosion from airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Standards and guidelines
Fulfils the hygiene requirements of

  • EN 16798, Part 3
  • VDI 6022, Sheet 1
  • DIN 1946, Part 4

Other standards and guidelines in accordance with the hygiene certificate
Casing leakage

  • EN 1751, Class C

Closed blade air leakage

  • EN 1751, Class 4
  • Meets the increased requirements of DIN 1946, Part 4, with regard to the acceptable closed blade air leakage


  • Maintenance-free as construction and materials are not subject to wear



Product Information




Operation Manuals