VRF Active

Minimum length – maximum accuracy. With LTG map control.

The VRFactive volume flow controllers are used to control a constant or variable volume flow in rectangular air ducts of Comfort Air Technology systems, up to full shut-off, regardless of the inlet pressure.
Available with dynamic (VRFactive) and static (VRFactive-s) measuring principle.
Activation and control are carried out with external energy (electrical).
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.
The housing has flanges with slotted holes, with cage nuts for the insulated version.

  • Highest control accuracy of all known controllers in the low air velocity range due to differential pressure amplification
  • Energy-efficient – minimal pressure loss due to small differential pressure element
  • Very short design, insensitive to inflow, simple integration
  • Optimized construction with particularly high airtightness
  • Also with static differential pressure measurement – suitable for laboratories and hospitals

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 17 - approx. 17 Volume flow range 300 m³/h Control ratio 10 : 1 Differential pressure range up to 1000 Pa Casing leakage according to DIN EN 1751 Class C Airtight shut-off to DIN EN 1751 Class 4 (200 x 100: Class 3) Control deviation max. 5% from V

Dimensions (Length x Width x Height in mm)

200 x 100-1200 x 400 Installation length [mm] 135 - 420


Insulating shell (optional) Analog / digital control (bus) Housing version analog Galvanized steel MP (optional) coated BACnet Silencer SDE (optional) Modbus Messprinzip dynamisch (für nicht belastete Luft) Static (for polluted air) (optional) Stainless steel (optional) Handeinstellgerät (optional)


Specification text Variable volumetric flow controller VRFactive
DOC 38.71 kB
Technical brochure variable volume flow controller VRFactive German
PDF 1.1 MB
Ordering help for variable volume flow controllers
FILE 217.52 kB
Overview brochure Product overview air distribution German
PDF 2.1 MB
Brief information on variable volumetric flow controllers VRactive German
PDF 860.37 kB
Operating instructions variable volumetric flow controller VRactive German
PDF 2.04 MB
Presentation Volume flow controller VRactive German
PDF 431.08 kB
Operating instructions 4-stage switch for domestic ventilation
PDF 597.96 kB
Variable volumetric flow controller design tool VREactive/VRFactive German
XLS 4.53 MB
Technical article Energy savings in ventilation and air conditioning systems through volume flow controllers German
PDF 735.95 kB
Technical article Savings potential volume flow controller German
PDF 313.38 kB
Planning aid for volume flow control
PDF 367.24 kB
Newsletter NFC "Assistant App"
PDF 393.18 kB