Diffusers

Adjustable air pattern swirl diffuser for installation flush with ceiling or free-hanging. Adjustable blades attached to bellmouth guide-ring slide helically over fixed swirl vanes providing constant pressure discharge direction modulation between horizontal and vertical via manual, electric or thermal adjustment.

Volume flow rate 

• 70 – 2000 L/s (250 – 7200 m³/h) 

Discharge height

• 2.5 – 15 m

Nominal sizes

• DN250
• DN355
• DN500
• DN710

Features

• High capacity swirl diffuser with adjustable discharge pattern
• Adjustable swirl vanes attached to helically adjustable guide-ring provide discharge direction modulation
• Swirl vanes with helical twist flatten vane pitch towards the periphery for increased airflow rate range of operation
• Steep central swirl vane pitch for increased airflow capacity and reduced pressure drop
• Substantially constant pressure from horizontal to vertical discahrge.
• Four nominal neck sizes, each available with an optional reducer for reduced airflow.
• Airflow rate range reduces by approximately 30% with each reduction in effective neck size.
• Standard circular face for all sizes
• Optional square face for sizes DN250 - DN500 suitable for ceiling grids from 300 mm up to 600 mm, depending on diffuser neck size
• Installation freely suspended or flush with closed ceiling
• Substantially flush face with 20 radially off-set swirl vanes
• Similar aesthetic to HSC-FD

Download: Selection Tool - (xls) (4/7/18)