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F:: 01978 856655
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LINEAR BAR
GRILLES

A range of linear bar grilles with horizontal
blades at either 0°, 15 °, 30° or 45° deflection and fixed or removable cores. Usually used in sidewall applications, but they are also designed to be used in ceilings or, in the case of the 0° and 15° deflection, for light floor duty.

Standard. Details of the standard blade spacing, angles of deflection and frame types with the appropriate model references are shown on pages 22, 23 and 24.

 
Standard Specification

SIZES
Sidewall Use
(Fixed core only or removable cores). The nominal duct size can be any length from 100mm to 2000mm in one piece and height in increments equivalent to the blade spacing from 50mm to 1200mm. A run longer than 2000mm can be made up to any length by
manufacturing the grille in sections provided the
nominal height is not more than 600mm. The sections will butt up to each other to give a continuous
appearance. Alignment plates (Code 0398) are
provided for the borders on multiple section grilles.

Ceiling Use
Fixed cores
The nominal duct size can be any length from 100mm to 2000mm in one piece and height in increments equivalent to the blade spacing from 50mm to 600mm. A run longer than 2000mm can be made up to any length by manufacturing the grille in
sections. Alignment plates (Code 0398) for the
borders are provided for multiple section grilles.

Removable cores
Any nominal length from 100mm to 1000mm in one piece and any height from 50mm to 600mm in i
ncrements equivalent to blade spacing. A run longer than 1000mm can be made up to any length by
manufacturing the grille in sections provided the
nominal height is not more than 600mm. The sections will butt up to each other to give a continuous
appearance. Alignment plates (Code 0398) for the borders are provided for multiple section grilles.

Lay in Cores
Same as for the removeable cores above except that maximum length is limited to 1000mm, as on Grille. It is essential that any ceiling mounted linear grilles with re-movable or lay in cores are fitted with safety wires.These limitations on size are imposed for safety reasons.

 

 
Standard Specification

(Fixed or lay in cores only) The nominal duct size can be any length from 100mm to 2000mm in one piece and the height from 50mm to 300mm in increments equivalent to the blade spacing. A run longer than 2000mm can be made up to any length by manufacturing the grille in sections. The sections will butt up to each other to give a continuous appearance. Alignment plates (Code 0647) for the borders are provided for multiple section grilles.

CONSTRUCTION
Aluminium with mechanical joints to lock the mitred corners.

CORE STYLES
The cores are either fixed, removable/lay in or core only. The removable cores are retained by either spring loaded buttons or horseshoe clips on the cross mullions when mounted in the vertical and by horseshoe clips or laying the core in the frame when mounted in the horizontal. See following pages for details of the core styles and codes.

FINISH
Silver satin anodised to BS1615 AA5.

FIXINGS
All codes, except the flangeless and spring location clip models, have countersunk screw holes in the border. Size no. 6 x 11/2´´ self tapping screws
provided with each grille and painted the same colour as the grille. (Fixing type 0F1) See Fixing Methods section for screw fixing centres. The
flangeless models, except when floor mounted and supported under the frame, require a removable core and are fixed through the stack of the grille (Fixing type 0F7) and spring location clip models have un-punched borders and are located by spring clips. (Fixing type 0F8) It is important to make clear when ordering if you do not require fixing holes in the border, particularly if you are ordering a removable core model and want to use concealed fixing.

 

 

OPTIONAL ALTERNATIVES/ADDITIONS

PACKAGING
Each grille is individually shrink wrapped in
polythene with additional cardboard support to the faces. Alignment plates are attached to one section in a linen draw-string bag.

TECHNICAL INFORMATION
See page 28

SIZES
Non standard sizes. We are not able to manufacture sizes other than those shown under the standard specification.

DAMPERS
Opposed blade damper. A clip on opposed blade damper (Code 0106) can be fitted, provided the nominal height does not exceed 450mm. The
exceptions are all the fixed core linear grilles that have a blade pitch of 6.25mm and the 45° deflection with a blade pitch of 12.5mm because it is not possible to access the damper operator on these
particular models, unless the core is removable.
Dampers cannot be fitted to ceiling mounted lay in models either.

Finishes
Any BS, RAL or NCS colour. Code 0145. Please specify the colour reference. We suggest powder coating on top of anodising for swimming pool applications. It may also be possible to anodise to alternative finishes for substantial quantities.
Details on request.

fixings
Concealed fixings / sub-frames are available. (Fixing type OF3) See Fixing Methods section. Please make sure that if you are fixing the grille by concealed methods, you order the grille with un-punched
borders. The 0 in the product code becomes 9.

MITRED CORNERS
Angled mitred corners. Any angled corner section can be manufactured from 40° to 179°. See page G27 for Codes and details.

2 WAY DISCHARGE
Two way blow. Most of the 15°, 30° and 45°
models can be made as two way opposite blow with the blades parallel to the long dimension. The first figure in the code would be 9 not 0. Please contact Head Office for details.

SAFETY WIRES
Safety wires (Code 0379) can be provided to attach the core to the border, where the core is removable, in order to minimise the possibility of accidents. They are fitted as standard on ceiling mounted removable core models.

 

PAN ADAPTORS, PLENUM & HEADER BOXES

(Un-insulated)
Top entry pan adaptor without flange (120mm high)*. Code 0323. Top entry pan adaptor without flange (17mm high). Code 0338. This height of pan adaptor should only be used where the spigot diameter plus 50mm 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*. Code 0328.
Side entry plenum flange for use on single grilles up to and
including 2 metres in length*. Code 0335.
Side entry plenum with flange for use on single grilles up to and including 2 metres in length*. Code 0324.
Side entry header box without flange for use on continuous runs over 2 metres long without opposed blade dampers. Code 0350.
Side entry header box without flange for use on continuous runs over 2 metres long with opposed blade dampers. Code 0362.
Side entry header box with flange for use on continuous runs over 2 metres long without opposed blade dampers.Code 0363.
Top entry header box with flange and flush fitting end caps
for use on continuous runs over 2 metres long without dampers.
Code 0374.
Top entry header box with flange and flush fitting end caps for use on continuous runs over 2 metres long with dampers. Code 0364.
Items with an * can be used on grilles with or without an opposed blade damper.
Please see Sheet MetalWork section for details and codes for top entry plenum and header boxes, additional spigots and insulation for plenums and header boxes that are available.

Pan adaptors, plenum boxes and header boxes can be fitted with quadrant dampers for either manual (Code 0483) or cord operated (Code 0484) control.

We can also design boxes with non standard heights where there is limited space above the ceiling or in the cavity.

ORDERING DETAILS

• The code for the basic product should have at least
13 digits. See page 1.
• Please always give the length first then the height.
• Add Codes for additions / alternatives as suffixes.
• Please make sure you order un-punched borders if you order concealed fixings.

EXAMPLE:
A linear grille to fit an opening 2300mm long x
200mm high having 15° deflection blades, a removable core retained by horse-shoe clips, opposed blade damper, pan adaptor without flange, to be concealed fix through the stack of the grille and painted
RAL 9010 satin would be coded:- 0237/02300/0200+0106+0323+0145-RAL 9010 satin, + OF2.
(un-punched borders).

Applications. Supply * Extract * Sidewall * Ceiling * Floor * Transfer *



Linear Grille Mitred Corner

Code 0464 0° deflection blades on 6.25mm centres
Code 0465 0° deflection blades on 12.50mm centres
Code 0466 0° deflection blades on 18.75mm centres
Code 0467 45° deflection blades on 12.50mm centres
Code 0468 45° deflection blades on 18.75mm centres
Code 0469 15° deflection blades on 12.50mm centres
Code 0470 30° deflection blades on 12.50mm centres

 

To Calculate The Outside Length For Any Angle Other Than 90°, Use The Formula Below

First Calculate The Angle Of The Cut = (180 - ) divided by 2
Then The Outside Opening Length = [ (Nominal Opening + 17.5mm) x Tan of The Angle Of Cut ] + 300mm

e.g. Assume Nominal Dimension = 300mm and = 135° then angle of cut = (180 - 135) / 2 = 22.5°

Outside Opening Length = [ (300 + 17.5mm) x Tan 22.5° ] + 300 = 431.5mm

 
PERFORMANCE DATA FOR LINEAR GRILLES
• This nomogram is based on Code 217 Linear Grilles and corrections should be applied for other codes. In the case of Linear grilles, the fixed parameters for selection are usually volume, throw and/or width of grille. To select for the volume and throw, the volume should be related to a metre run. For example, if the length is to be 500mm and the volume 0.15m3/s, then volume per metre would be 1 ÷ 0.5 x 0.15 = 0.3m3/s/. If the required throw is 7 metres, place a ruler on the volume line at 0.3 and cross the throw line at 7 metres. The rule crosses the width line at 275mm. If there is a limitation on the width of the grille, say 200mm wide in the above case, and the throw was critical, then the length would have to be increased. Design throws should always be corrected using tables 1, 2, 3 and 4 as appropriate, before entering the nomogram. Pressure drop and NR should be corrected after using the nomogram.
 
PERFORMANCE DATA
 

 

 

 

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