Linear Slot Diffusers

Model LSDLSD

LinearSlotDiffusersLSD600x300 LinearSlotDiffuers600x300 Dia20mm LinearSlotDiffuers600x300 Dia25mm2 LinearSlotDiffuers600x300 DiaLSDRC20 LinearSlotDiffuers600x300 DiaLSDRC25
LinearSlotDiffusersLSD600x300 LinearSlotDiffuers600x300 Dia20mm LinearSlotDiffuers600x300 Dia25mm2 LinearSlotDiffuers600x300 DiaLSDRC20 LinearSlotDiffuers600x300 DiaLSDRC25

Polyaire Linear Slot Diffusers are an attractive alternative to the ceiling or high sidewall supply diffusers. Slot diffusers can be installed individually in set lengths or in a continuous line. They can also be installed in any type of ceiling application.

The modules are available with a 20mm or 25mm Slot with the number of slots ranging from 1 to 8 slots and are further available as fixed or removable core. (Fixed Core - Model LSD-FC, Removable Core – LSD-RC.

The air pattern control is adjustable from the diffuser face and is achieved by means of an adjustable pattern control with each slot, enabling a full 180º air pattern adjustment. The suggested volume control should be from the main duct run take-off, or from a butterfly damper fitted to the inlet of the cushion head box.

Construction is from extruded aluminium and the recommended maximum length for each section is 3 metres. Standard finish is powder coat white while other finishes are available to suit the interior and architectural design requirements.

 LinearSlotDiffuers600x300 Dia20mmLinearSlotDiffuers600x300 Dia25mm

Fixed Core Linear Model LSD 
Sizes Available/Dimensions
   20mm slot 25mm slot
 No of slots Neck size Face size Box size Neck size Face size Box size
 1 34mm 81mm 45mm 39mm 86mm 50mm
 2 67mm 114mm 79mm 77mm 124mm 89mm
 3 100mm 147mm 111mm 115mm 162mm 127mm
 4 133mm 180mm 145mm 153mm 200mm 165mm
 5 167mm 214mm 176mm 192mm 239mm 205mm
 6 200mm 247mm 212mm 230mm 277mm 241mm
 7 233mm 280mm 245mm 268mm 315mm 280mm
 8 267mm  314mm 279mm 308mm 355mm 318mm

 
LinearSlotDiffuers600x300 DiaLSDRC20

LinearSlotDiffuers600x300 DiaLSDRC25

Removable Core Linear Model LSD-RC
Sizes Available/Dimensions
   20mm slot 25mm slot
 No of slots Neck size Face size Box size Neck size Face size Box size
 1 45mm 85mm 55mm 50mm 90mm 60mm
 2 78mm 118mm 89mm 88mm 128mm 99mm
 3 111mm 151mm 123mm 126mm 166mm 137mm
 4 144mm 184mm 150mm 164mm 204mm 175mm
 5 178mm 218mm 189mm 203mm 243mm 214mm
 6 211mm 251mm 222mm 241mm 281mm 252mm
 7 244mm 284mm 255mm 279mm 319mm 290mm
 8 278mm 318mm 289mm 319mm 359mm 329mm


Slot Type Diffusers
Type LSD - Selection Data

Two Way Blow
 L/s per metre   2 slots wide 4 slots wide 6 slots wide 8 slots wide
31  Blow in m. 1.83 - - -
Pressure drop (Pa)  2.5 - - -
Suitable N/C level  less than 25 - - -
47   Blow in m.  2.74 - - -
Pressure drop (Pa)  5 - - -
Suitable N/C level  less than 25 - - -
62 Blow in m. 3.35 2.13 - -
Pressure drop (Pa) 10 2 - -
Suitable N/C level 25 less than 25 - -
78 Blow in m.   3.96  2.74 - -
Pressure drop (Pa)  20  2.5 - -
 Suitable N/C level 30  less than 25 - -
 93  Blow in m.  4.88  3.05  2.13  -
 Pressure drop (Pa)   2 5  2.5  -
 Suitable N/C level   32   less than 25   less than 25 -
108   Blow in m.  5.8 3.66 2.44  -
 Pressure drop (Pa)   32.4 7.5 2.5 -
  Suitable N/C level  35 less than 25 less than 25 -
124   Blow in m.   6.7 3.96 2.74  2.44 
Pressure drop (Pa) 40 10 5 2.5
Suitable N/C level  38 less than 25   less than 25  less than 25
139 Blow in m. - 4.57 3.05  2.44
Pressure drop (Pa) - 12.5 5 2.5
Suitable N/C level  - less than 25 less than 25 less than 25
155 Blow in m. - 4.88 3.66 2.74
Pressure drop (Pa)  - 17.4 7.5 2.5
Suitable N/C level
  - 25 less than 25  less than 25
170 Blow in m.  - 5.5 3.96 3.05
Pressure drop (Pa)   - 27.4 7.5 5
Suitable N/C level   - 30 25 less than 25 
186  Blow in m. -   6.1  4.26  less than 25
Pressure drop (Pa)  -  34.9   10  5
Suitable N/C level   -  30   25  25
217  Blow in m.  -  -   4.88 3.96 
 Pressure drop (Pa)  -  -  12.5 7.5 
Suitable N/C level    -  -  30  25 
248  Blow in m.  -   - 5.5  4.57 
 Pressure drop (Pa)  -   -  17.4 10 
 Suitable N/C level   -   - 30  28 
279  Blow in m.  -  -  6.7  5.5 
Pressure drop (Pa)   -  -   22.4 12.5 
 Suitable N/C level    -  - 32  30 
310  Blow in m.  -  -  7.62  6.1 
Pressure drop (Pa)    - -  25  14.9 
Suitable N/C level     - -  35  32 


Slot Type Diffusers
Type LSD - Selection Data

One Way Blow
L/s per metre   1 slots wide 2 slots wide 3 slots wide 4 slots wide
16  Blow in m. 1.83  -  - -
 Pressure drop (Pa)
 2.5  - - -
Suitable N/C level less than 25 - - -
31 Blow in m.   3.4 2.1  -  -
 Pressure drop (Pa)  10 10  -  -
Suitable N/C level less than 25 less than 25 - -
47 Blow in m.   4.9 3.0 2.1 - 
  Pressure drop (Pa) 25 7.5 2.5 - 
Suitable N/C level  25 less than 25   less than 25 - 
62 Blow in m.   6.7 4.0 2.7 2.4
  Pressure drop (Pa) 40 10 5 2.5
Suitable N/C level  30 less than 25   less than 25   less than 25 
78 Blow in m.   -  5.2  3.7 2.7 
  Pressure drop (Pa) -  15  7.5 2.5 
 Suitable N/C level - less than 25  less than 25 less than 25 
93 Blow in m.   - 6.1 4.3 3.4
 Pressure drop (Pa)  - 22 10 5
Suitable N/C level  - 25 less than 25  less than 25 
108 Blow in m.   - 7.3 4.9 4.0
 Pressure drop (Pa)  - 30 12.5 7.5
Suitable N/C level  - 30 less than 25  less than 25
124  Blow in m.  - - 5.5 4.6
 Pressure drop (Pa)  - - 17.5 10
 Suitable N/C level - - 25 less than 25 
139 Blow in m.   - - 6.7 5.5
 Pressure drop (Pa)  - - 22 12.5 
Suitable N/C level - - 30 less than 25 
155 Blow in m.   - - 7.6 6.1
 Pressure drop (Pa)  - - 25 15
 Suitable N/C level - - 32 30