OKA-S supply air diffuser

OKA-S is a ceiling diffuser with excellent air and sound properties combining a wide throw pattern and high mixing ratio. The diffuser can also be installed on a wall.

Air flow range

5-13 dm³/s, 18-47 m³/h

Duct sizes

Ø 100-125 mm


For ceiling and wall installation

Color options

RAL 9016 white (matte), RAL 9005 black (matte)

Search for the product on our selection tool


OKA-S is suitable for low airflows, such as in saunas and wardrobes. Reliable measurement and fast, accurate adjustment are also some of OKA-S properties and it is usable for both supply and exhaust air. The supply air diffuser OKA-S usually is ceiling-installed, but it can be installed on a wall as well.


  • Silent, draught-free air distribution in the room
  • Reliable, accurate adjustment
  • With static pressure measurement connection

Quick Selection Guide

OKA-S Dimensions

Selection Diagram

The graphs are not intended for adjustment.

OKA-S-100 and OKA-S-125

Sound attenuation

Sound level will increase if cover distance is below 3x Ød:

  • after bend  +4 dB (A)
  • after T joint  +8 dB (A)