Description
Systemair EFF exhaust diffuser with lockable settings.

Function
The EFF is an exhaust diffuser for installation on ceiling or wall. It can also be used for supply air. The diffuser has a lockable central cone which is rotated to adjust the pressure and consequently the air volume.

Design
The EFF is manufactured from sheet steel with a white powder-coated finish (RAL 9010-80) and is available in the following diameters: ø 80, ø 100, ø 125, ø 160 and ø 200. The ø 160 (EFF 160a) size is suitable for both 150 and 160 diameter ducts.

Mounting
All sizes can be installed directly onto the duct. Also need an RFP100 mounting plate, also available.

Adjustment
The pressure is adjusted by rotating the valve cone.