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A range of ceiling diffusers with individually adjustable curved blades for use in heating / cooling applications where the mounting height is less than 3 metres.

The diffuser provides a deeper air envelope than a fixed blade diffuser and, consequently, is capable of handling larger volumes of air in many situations. Supplied with
or without an opposed blade damper.

Code 0121. Square or rectangular diffuser.

Code 0142. Square or rectangular tile replacer sizes with unpunched borders. i.e. 595mm x 595mm or 1195mm x 595mm over the flanges for lay-in `T´ systems.

Code 0120. A tile replacer version of the Code 0142 with a square edge flange and overall size of 600mm x 600mm or 1200mm x 600mm to fit most clip type ceilings. Please specify the make and type of ceiling, and provide details.

Standard Specification

Code 0121. 50mm increments in the nominal size from 200mm to 1200mm on the length and from 200mm to 600mm on the height, except for core
patterns D, E, M, N and P where the minimum size is 250mm x 250mm.
Code 0141. 550mm x 550mm or 1150mm x 550mm nominal to give 595mm x 595mm or 1195 x 595mm overall respectively.
Codes 0120. 555mm x 555mm or 1155mm x 555mm nominal to give 600mm x 600mm or 1200mm x 600mm overall respectively.

D = Nominal Duct size
Model shown is Code 0121 + 0106
Curved Blade Diffuser with Opposed Blade Damper

Aluminium with mechanical joints to lock the mitred corners of the flange.

Silver satin anodised to BS 1615.AA5.

Code 0121. Countersunk screw holes in the border. Size no. 6 x 11/2 self tapping screws provided with each diffuser in matching colour. (Fixing type OF1).
See Fixing Methods section for screw fixing centres.
Codes 0142. Lay in to a `T´ bar system. Un-punched borders. Fixing type 0F9.
Codes 0120. Require the addition of the
appropriate clips to fix them into the ceiling system. Un-punched borders. See optional alternatives/
additions below. Fixing types OF4 and OF5.
It is essential that any duct or grille box that is to be attached to any of the above diffusers is independently supported.

Each grille is shrink wrapped in polythene with
additional cardboard support to the faces.

Technical information.
See pages 14 - 17


Optional Alternatives/Additions

Code 0121 - We can manufacture almost any nominal size within the standard maximum and minimum sizes. Please contact the factory for details. The product code prefix becomes 9 instead of 0.

A clip on opposed blade damper in mill finish
aluminium. Code 0106 or 9106 if a non stadard size.

Any BS, RAL or NCS colour. Code 0145. Please
specify the colour reference required. It may also be possible to anodise to alternative finishes for
substantial quantities. Details on request.

Concealed fixings/sub frames. Unpunched borders. Fixing type OF3. See Fixing Methods section for details.
Code 0120 Clips (Code 0430) are available for
locating the diffuser in most clip type ceiling systems (fixing type OF4) or clips (ode 0432) for most tegular type ceiling systems. (fixing type OF5) See page 17 for details.

Tile re-placer plate
Code 0368. An aluminium plate to convert a correctly sized diffuser to a lay-in `T´ bar tile replacer size, i.e. 595mm x 595mm overall. The plate is finished in the same colour as the diffuser.



Top entry pan adaptor without flange (120mm high)*.
Code 0323.

Top entry pan adaptor without a flange (17mm high). Code 0338.

This height of pan should only be used where the spigot diameter plus 50 is equal to or greater than the largest nominal dimension of the pan and the grille does not have a damper fitted to it.

Top entry pan adaptor with flange (120mm high)*. Code 0328.
Side entry plenum box without flange*. Code 0335.
Side entry plenum box with flange*. Code 0324.

Items with an * can be used on grilles with or without an opposed blade damper.

Details are shown in the Sheet Metal Work section along with codes covering insulated plenum boxes.

Pan adaptors & Plenum boxes can be fitted with quadrant dampers in the spigot for either manual (Code 0483) or cord operated (Code 0484) control.

We can also design boxes with non-standard heights where there is a limited space in the cavity. Please contact our technical staff at Head Office.


• The code for the basic grille should have 13 digits.
See page 1.
• Please always give length first and then height.
• Add codes for additions/alternatives as suffixes.

A standard four way blow square ceiling diffuser, 500mm x 500mm nominal size with OBD, face fix with screws and painted RAL9006 satin would be coded - 0121/00500/0500E+0106+0145-RAL 9006 satin +OF1.

Applications. Supply * Ceiling *





  SCOTTAIRE Davy Way, Llay Industrial Estate, Wrexham,LL12 0PG Tel: 01978 856555 Fax: 01978 856655 Email: sales@scottaire.com