VRF Vent

High control accuracy
Simple assembly

High accuracy with low pressure loss thanks to LTG’s VenturiControl control principle

The VRFvent volume flow controllers are used to control a constant or variable volume flow in rectangular air ducts of Comfort Air Technology systems independently of the inlet pressure.
A full barrier can also be implemented.
Actuation and control are carried out with external energy, either electrically or pneumatically.
The housing cross-sections match the recommended edge lengths for rectangular air ducts in accordance with DIN EN 1505. This makes it possible to select the largest possible flow cross-section even in cramped installation conditions.

  • High control accuracy and significant energy saving potential – flow-optimized two-stage nozzle with minimal pressure loss for high effective pressures even at low air velocities
  • Universally suitable for mounting various controller makes/components
  • Combination with spring return or high-speed drives possible
  • For dynamic (VRFvent) and static measurement (VRFvent-s).
  • Easy to adjust: can also be retrofitted on site, damper position can be read from the outside
  • Simple installation using flanges with slotted holes (or with sliding cage nuts for insulated version)

Ready for a breath of fresh air? Contact our comfort air experts now and breathe a sigh of relief - in the truest sense of the word!

Technical data

Technical Data for L_pa= 35 dB(A)

Volume flow range 70 - approx. 17 Volume flow range 200 m³/h Differential pressure range up to 1000 Pa

Dimensions (Length x Width x Height in mm)

200 x 100-1200 x 400


Housing version Galvanized steel Messprinzip dynamisch (für nicht belastete Luft) Static (for polluted air) (optional) Insulating shell (optional) Silencer accessories (optional)


Specification text Variable volumetric flow controller VRFvent
DOC 47.77 kB
Variable volume flow controller design tool VRFvent German
FILE 2.16 MB
Technical brochure variable volume flow controller VRFvent German
PDF 2.04 MB
Operating instructions variable volume flow controller VRFvent German
PDF 1.3 MB
Ordering help for variable volume flow controllers
FILE 217.52 kB
Overview brochure Product overview air distribution German
PDF 2.1 MB