July 1, 2022
July 4, 2022



Rectangular air terminal units for standard applications in supply air or extract air systems with variable volume flow rates, suitable for low-leakage shut-off

  • For volume flow rate ranges up to 28836 m³/h or 8010 l/s
  • Suitable for the control of volume flow rate, room pressure or duct pressure
  • Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
  • High control accuracy
  • Closed blade air leakage to EN 1751, class 3
  • Casing air leakage to EN 1751, up to class C

Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type TX for the reduction of air-regenerated noise
  • Hot water heat exchanger of Type WT for reheating the airflow
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General Information


  • Rectangular VAV terminal units for use in ventilation and air conditioning systems
  • For controlling, restricting, or shutting off supply and extract air flows
  • Closed-loop volume flow control using an external power supply
  • For variable or constant volume flow systems
  • Shut-off by means of switching (equipment supplied by others)
  • Can also be used for duct or room pressure control with suitable control components

Special features

  • Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • Factory set-up or programming and aerodynamic function testing
  • Parameters can also later be set on the control component. Depending on the control component, an additional adjustment device may be necessary

Nominal sizes

  • 36 nominal sizes from 200 × 100 to 1000 × 600
  • Not all attachments may be available or suitable for all sizes of terminal units


  • TVT: VAV terminal unit
  • TVT-D: VAV terminal unit with acoustic cladding
  • Units with acoustic cladding and/or secondary silencer Type TX for demanding acoustic requirements
  • Acoustic cladding cannot be retrofitted


  • Galvanised sheet steel
  • P1: Powder-coated, silver (RAL 7001)

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 blades
  • Factory assembled control components complete with wiring and tubing
  • Aerodynamic functional testing on a special test rig before shipping of each unit
  • Set-up data is given on a label or volume flow rate scale affixed to the unit
  • High volume flow rate control accuracy


  • EASY controller: compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
  • 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 TX for demanding acoustic requirements
  • Heat exchanger Type WT

Construction features

  • Rectangular casing
  • Flanges on both ends, suitable for duct connection
  • Opposed blade action, blades connected by internal gears (enclosed) at both ends
  • Damper blades with replaceable seals
  • Position of the damper blade indicated externally at shaft extension
  • Bearings with ring seals

Materials and surfaces

Galvanised sheet steel construction

  • Casing made of galvanised sheet steel
  • Shaft and linkage made of galvanised steel
  • Damper blades and effective pressure sensor made of aluminium
  • Gears made of anti-static plastic (ABS), temperature resistant to 50 °C
  • Plastic plain bearings

Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated

Variant with acoustic cladding (D)

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

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

Standards and guidelines

Fulfils the hygiene requirements of

  • EN 16798, Part 3
  • VDI 6022, Sheet 1
  • DIN 1946, Part 4
  • For other applicable standards and guidelines refer to the hygiene certificate

Casing leakage

  • EN 1751, Class C; if B + H ≤ 400, Class B

Closed blade air leakage

  • EN 1751, Class 3
  • Meets the general 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