Air terminal devices for perfored diffusers



Air terminal units of UDF series are constituted by a performed square face diffuser with insulated plenum complete of calibration damper.

UDF series units are applicable on ceiling both false ceiling or distribution system at view  for supply air.

Plenum or calm box, allows to eliminate or reduce the non-uniformity of the velocity profile of the air coming from the supply duct. In this way, the throw characteristics of the diffuser will comply with those laid without asymmetry or directionality caused by unwanted velocity gradients.

Cestaro Bernardo Srl is able to offer in a short working times both standard and special constructions of dimensional and construction specifications required by the customer.


Structure and dimensions


Material:                           Steel (aluminum frame) 

Standard finishing:        Powder painted white RAL 9010 

Fixing:                               by side screws

For special constructions, the surface finishing can be carried out in not standard RAL colours by powder painting.

Insulated plenum

Material:                        Galvanized steel

Isolation:                       outside

Fixing:                            by screws

Connection:             upper side

Regulation:                   by calibration damper

For special constructions, the plenum can be supplied without isolation and with upper connection.

Heat insulating material

Polyethylene adhesive in Class "1" reaction to fire (DM 26/06/1984). External standard applying. Internal application on request.


Maximum operating temperature: 70 °C


Square standard with upper circular connection in the hole/connection sizes combination shown on the following.


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