OKA supply air diffuser

The round design and perforation of OKA supply air diffuser create a traditional feeling in the room where it is installed. OKA combines excellent sound and air properties and ensures a silent and draught-free air distribution in the room.

Air flow range

5-50 dm³/s, 18-180 m³/h

Duct sizes

Ø 100-200 mm, Ø 100P-125P


For wall installation

Color options

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

Search for the product on our selection tool


The clean-lined design blends excellently in with other ceiling-installed fixtures in the room. OKA is a ceiling diffuser with excellent air and sound properties combining a wide throw pattern and high mixing ratio. In addition, reliable measurement and fast, accurate adjustment are properties of the supply air diffuser OKA. There is also an own model, OKA-S, suitable for low airflows, such as saunas and wardrobes.


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

Quick selection guide


Main dimensions

Selection diagram

Graphs are not intended for adjustment.

OKA-100 ja OKA-100P

OKA-125 ja OKA-125P



Sound attenuation

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

  • after bend +5 dB (A)
  • after T joint  +8 dB (A)

Airborne sound insulation

Sound attenuation for air ducts  between rooms Dn,e,wdB

Supply air

Read more about the VAL damper plenum box