USK-UNC
• The USK and UNC are suitable for
ceiling installation and provide airflows of
30-1000 m 3 /h (10-280 l/s).
• The USK is more suitable for horizon-
tal mounting whereas the UNC can be in-
stalled in a horizontal or vertical position.
• The airflow can be controlled by me-
ans of the bottom adjustment plate.
• We recommend use with a minimum
temperature of input air that is a maxi-
mum of 10°C lower than that of the
room.
• The USK series comes in 5 sizes:
100; 125; 160; 200; 250. The UNC co-mes in 4: 125; 160; 200; 250.

Construction characteristics
• USK and UNC: powder coated sheet
steel in white RAL 9010. Plenum boxes:
galvanized sheet steel.

Fitting
• Can be connected directly to circular
duct connection or to TLR, TL, HLR or TK
plenum boxes.

Performance data
The performance data applies to USK/UNC with plenum
box TLR/TK.
The sound pressure levels L A shown on the diagrams are
measured in a room with an attenuation of 10 m 2 sabine.
Sound power level: L W dB
Sound pressure: L A dB (A) (see diagrams)
Correction factor: K O dB from tables
L W = L A + K O
The attenuation shown in the table is applicable from the
duct to the room.