ILO supply air diffuser

ILO is an extremely stylish supply air diffuser for suspended and coffered ceilings. It combines modern and stylish design with excellent air and sound properties. Thanks to ILO’s patented sideways adjustability the product is also uniquely easy to install.

Air flow range

5-130 dm³/s, 18-468 m³/h

Duct sizes

Ø 125-315 mm


Galvanized steel

Color options

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

Search for the product on our selection tool


The vanes of the twist-supply diffuser ILO create a whirling throw pattern expanding horizontally. ILO is perfect for both constant and variable airflows, and thanks to its high mixing ratio, also for cooled air.

ILO Z is a special model designed for suspended ceilings with the ceiling panels concealing the T-bar grid.

ILO fits FLO balancing plenum box

One of ILO’s most prominent properties is the patented sideways adjustability that makes installation work remarkably easy. Even if the duct installation places the diffuser off-centre in the ceiling opening, the sideways adjustability allows shifting it exactly into place without moving the ducts. This adjustability ensures an always tidy installation and may save a lot of installation time.

Watch a video about the sideways adjustability


  • Modern and stylish design
  • Uniquely easy installation and sideways adjustability
  • A whirling throw pattern expanding horizontally
  • Excellent air and sound properties
  • Z model designed for suspended ceilings with the ceiling panels concealing the T-bar grid.

Product code

ILO 250 600 + Z + FLO 200 / 250
1 2   3   4   5   6   7


1 = Supply air diffuser ILO
2 = Supply air diffuser size
3 = Panel size of suspended/coffered ceiling
4 = Lowered diffuser part
5 = Balancing plenum box FLO
6 = Balancing plenum box duct size
7 = Balancing plenum box connection to diffuser

Quick guide




Dimensioning ILO + FLO

ILO-125 + FLO-100-125 Supply air


ILO-125 + FLO-125-125 Supply air


ILO-160 + FLO-100-160 Supply air


ILO-160 + FLO-125-160 Supply air


ILO-160 + FLO-160-160 Supply air


ILO-200 + FLO-125-200 Supply air


ILO-200 + FLO-160-200 Supply air


ILO-200 + FLO-200-200 Supply air


ILO-250 + FLO-160-250 Supply air


ILO-250 + FLO-200-250 Supply air


ILO-250 + FLO-250-250 Supply air


ILO-315 + FLO-200-315 Supply air


ILO-315 + FLO-250-315 Supply air


ILO-315 + FLO-315-315 Supply air

Throw pattern and length

Throw pattern

Throw length

Air flow – throw lenght – spiral flow

Ceiling construction options

ILO is available for smooth ceiling surfaces and T-grid ceiling structures with both visible and concealed grids.

1. Smooth ceiling surface


2. T-grid ceiling with concealed grid

Easy maintenance