Square Ceiling Diffusers LFD

Model LFDLFD

SquareCeilingDiffuserLFD2 4 Way 9005 1 SquareCeilingLFD 4WayBlow 247084 SquareCeilingDiffuserLFD CDia2 LFD Directions TDLFD
SquareCeilingDiffuserLFD2 4 Way 9005 1 SquareCeilingLFD 4WayBlow 247084 SquareCeilingDiffuserLFD CDia2 LFD Directions TDLFD

The Polyaire range of Square Ceiling Diffusers are designed to provide excellent directional performance typically in a 4 way airflow pattern.

Manufactured from extruded aluminium the diffuser offers a removable core as standard while also providing options for 1 way, 2 way opposite, 2 way corner and 3 way airflow patters. LFD's are lightweight and will not rust or corrode under normal usage. The flush frame is designed for surface mounting in the ceiling or alternatively as a lay-in frame for T-Bar ceiling installations.

Standard finish is powder coat white (RAL9010) while other finishes are available to suit the interior and architectural design requirements.

All size of 4-Way Diffusers are also stocked in RAL9016.

The 595x595mm is also stocked in RAL9005 (Black)

We also offer the 595x595mm to fit a Tegular Ceiling (8mm Drop)

Construction:

Aluminium

Features:

  • Louvre faced ceiling diffusers are all aluminium including the frame, blades and centre core.
  • LFD’s are lightweight and will not rust or corrode under normal usage.
  • Suitable for flush mounting under a plaster ceiling or lay-in T Bar ceiling grids.
  • Removable core and safety cord makes them easy to install, clean & access dampers located behind diffusers.
  • The LFD range is suitable for heating, cooling or ventilation in commercial and domestic applications.
  • Diffuser ratings are based on mounting height being 2.8 metres. Throw range is defined by the minimum and maximum horizontal distances at right angles to the side of the diffuser.
  • 1-Way, 2-Way Opposite, 2-Way Corner, 3-Way & 4-Way available
  • Stock diffusers can also be provided with internal blanking plates to achieve 1, 2 & 3 Way Blow

 Core Patterns

Louvre Face Diffuser - Metal

Sizes Available/Dimensions

Item # Description Colour
  150 x 150mm  
248001 LFD 150 x 150mm Neck with 295 x 295mm Face Four Way Blow RAL 9010
248001/6 LFD 150 x 150mm Neck with 295 x 295mm Face Four Way Blow + OBD RAL 9010
248001 RAL9016 LFD 150 x 150mm Neck with 295 x 295mm Face Four Way Blow RAL 9016
248001/6 RAL9016 LFD 150 x 150mm Neck with 295 x 295mm Face Four Way Blow + OBD RAL 9016
248001/1W LFD 150 x 150mm Neck with 295 x 295mm Face 1 Way Blow RAL 9010
248001/2W LFD 150 x 150mm Neck with 295 x 295mm Face 2 Way Blow RAL 9010
248001/3W LFD 150 x 150mm Neck with 295 x 295mm Face 3 Way Blow RAL 9010
248001/6/1W LFD 150 x 150mm Neck with 295 x 295mm Face 1 Way Blow + OBD RAL 9010
248001/6/2W LFD 150 x 150mm Neck with 295 x 295mm Face 2 Way Blow + OBD RAL 9010
248001/6/3W LFD 150 x 150mm Neck with 295 x 295mm Face 3 Way Blow + OBD RAL 9010
     
  200 x 200mm  
248002/200 N LFD 200 x 200mm Neck with 345 x 345mm Face Four Way Blow RAL 9010
248002/200 N/6E LFD 200 x 200mm Neck with 345 x 345mm Face Four Way Blow + OBD RAL 9010
248002/200 N RAL9016 LFD 200 x 200mm Neck with 345 x 345mm Face Four Way Blow RAL 9016
248002/200 N/6E RAL9016 LFD 200 x 200mm Neck with 345 x 345mm Face Four Way Blow + OBD RAL 9016
     
  225 x 225mm  
248002 LFD 225 x 225mm Neck with 370 x 370mm Face Four Way Blow RAL 9010
248002/7 LFD 225 x 225mm Neck with 370 x 370mm Face Four Way Blow + OBD RAL 9010
248002 RAL9016 LFD 225 x 225mm Neck with 370 x 370mm Face Four Way Blow RAL 9016
248002/7 RAL9016 LFD 225 x 225mm Neck with 370 x 370mm Face Four Way Blow + OBD RAL 9016
248002/1W LFD 225 x 225mm Neck with 370 x 370mm Face 1 Way Blow RAL 9010
248002/2W LFD 225 x 225mm Neck with 370 x 370mm Face 2 Way Blow RAL 9010
248002/3W LFD 225 x 225mm Neck with 370 x 370mm Face 3 Way Blow RAL 9010
248002/7/1W LFD 225 x 225mm Neck with 370 x 370mm Face 1 Way Blow + OBD RAL 9010
248002/7/2W LFD 225 x 225mm Neck with 370 x 370mm Face 2 Way Blow + OBD RAL 9010
248002/7/3W LFD 225 x 225mm Neck with 370 x 370mm Face 3 Way Blow + OBD RAL 9010
     
  250 x 250mm  
248002/250 N LFD 250 x 250mm Neck with 395 x 395mm Face Four Way Blow RAL 9010
248002/250 N/7E LFD 250 x 250mm Neck with 395 x 395mm Face Four Way Blow + OBD RAL 9010
248002/250 N RAL9016 LFD 250 x 250mm Neck with 395 x 395mm Face Four Way Blow RAL 9016
248002/250 N/7E RAL9016 LFD 250 x 250mm Neck with 395 x 395mm Face Four Way Blow  + OBD RAL 9016
     
  300 x 300mm  
248003 LFD 300 x 300mm Neck with 450 x 450mm Face Four Way Blow RAL 9010
248003/8 LFD 300 x 300mm Neck with 450 x 450mm Face Four Way Blow + OBD RAL 9010
248003 RAL9016 LFD 300 x 300mm Neck with 450 x 450mm Face Four Way Blow RAL 9016
248003/8 RAL9016 LFD 300 x 300mm Neck with 450 x 450mm Face Four Way Blow + OBD RAL 9016
248003/1W LFD 300 x 300mm Neck with 450 x 450mm Face 1 Way Blow RAL 9010
248003/2W LFD 300 x 300mm Neck with 450 x 450mm Face 2 Way Blow RAL 9010
248003/3W LFD 300 x 300mm Neck with 450 x 450mm Face 3 Way Blow RAL 9010
248003/8/1W LFD 300 x 300mm Neck with 450 x 450mm Face 1 Way Blow + OBD RAL 9010
248003/8/2W LFD 300 x 300mm Neck with 450 x 450mm Face 2 Way Blow + OBD RAL 9010
248003/8/3W LFD 300 x 300mm Neck with 450 x 450mm Face 3 Way Blow + OBD RAL 9010
     
  350 x 350mm (to fit 500mm Sq Ceiling Grid)  
248004/495x495 LFD 350 x 350mm Neck with 495 x 495mm Face 4-Way Blow RAL9010
248004/495x495/9E LFD 350 x 350mm Neck with 495 x 495mm Face 4-Way Blow + OBD RAL9010
     
  375 x 375mm  
248004 LFD 375 x 375mm Neck with 520 x 520mm Face Four Way Blow RAL 9010
248004/9 LFD 375 x 375mm Neck with 520 x 520mm Face Four Way Blow + OBD RAL 9010
248004 RAL9016 LFD 375 x 375mm Neck with 520 x 520mm Face Four Way Blow RAL 9016
248004/9 RAL9016 LFD 375 x 375mm Neck with 520 x 520mm Face Four Way Blow + OBD RAL 9016
248004/1W LFD 375 x 375mm Neck with 520 x 520mm Face 1 Way Blow RAL 9010
248004/2W LFD 375 x 375mm Neck with 520 x 520mm Face 2 Way Blow RAL 9010
248004/3W LFD 375 x 375mm Neck with 520 x 520mm Face 3 Way Blow RAL 9010
248004/9/1W LFD 375 x 375mm Neck with 520 x 520mm Face 1 Way Blow + OBD RAL 9010
248004/9/2W LFD 375 x 375mm Neck with 520 x 520mm Face 2 Way Blow + OBD RAL 9010
248004/9/3W LFD 375 x 375mm Neck with 520 x 520mm Face 3 Way Blow + OBD RAL 9010
     
  450 x 450mm (to fit 600mm Sq Ceiling Grid)  
248005 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow RAL 9010
248005/10 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow + OBD RAL 9010
248005 RAL9016 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow RAL 9016
248005/10 RAL9016 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow + OBD RAL 9016
248005 RAL9005 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow RAL 9005 
248005/10 RAL9005 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow + OBD RAL 9005 
248005/1W LFD 450 x 450mm Neck with 595 x 595mm Face 1 Way Blow RAL 9010
248005/1W-RAL9016 LFD 450 x 450mm Neck with 595 x 595mm Face 1 Way Blow RAL 9016
248005/2W LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Blow RAL 9010
248005/2W-RAL9016 LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Blow RAL 9016
248005/3W LFD 450 x 450mm Neck with 595 x 595mm Face 3 Way Blow RAL 9010
248005/3W-RAL9016 LFD 450 x 450mm Neck with 595 x 595mm Face 3 Way Blow RAL 9016
248005/10/1W LFD 450 x 450mm Neck with 595 x 595mm Face 1 Way Blow + OBD RAL 9010
248005/10/2W LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Blow + OBD RAL 9010
248005/10/3W LFD 450 x 450mm Neck with 595 x 595mm Face 3 Way Blow + OBD RAL 9010
     
  450 x 450mm Tegular (8mm Drop)  
248005/TEG 8 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow - Tegular 8mm RAL9010
248005/10/TEG 8 LFD 450 x 450mm Neck with 595 x 595mm Face Four Way Blow + OBD - TEGULAR 8mm RAL9010
     
  2-Way Corner Diffusers  
349001/2WC LFD 150 x 150mm Neck with 295 x 295mm Face 2 Way Corner Blow RAL 9010
349001/6/2WC LFD 150 x 150mm Neck with 295 x 295mm Face 2 Way Corner Blow + OBD RAL 9010
349002/2WC LFD 225 x 225mm Neck with 370 x 370mm Face 2 Way Corner Blow RAL 9010
349002/7/2WC LFD 225 x 225mm Neck with 370 x 370mm Face 2 Way Corner Blow + OBD RAL 9010
349003/2WC LFD 300 x 300mm Neck with 450 x 450mm Face 2 Way Corner Blow RAL 9010
349003/8/2WC LFD 300 x 300mm Neck with 450 x 450mm Face 2 Way Corner Blow + OBD RAL 9010
349004/2WC LFD 375 x 375mm Neck with 520 x 520mm Face 2 Way Corner Blow RAL 9010
349004/9/2WC LFD 375 x 375mm Neck with 520 x 520mm Face 2 Way Corner Blow + OBD RAL 9010
349005/2WC LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Corner Blow RAL 9010
349005/10/2WC LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Corner Blow + OBD RAL 9010
349005/2WC/9016 LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Corner Blow RAL9016
349005/10/2WC/9016 LFD 450 x 450mm Neck with 595 x 595mm Face 2 Way Corner Blow + OBD RAL9016

 

Technical Data:

Neck Size (mm) Airflow (L/s) Velocity (m/s) Static Pressure Drop (P/a) NR (dB) Minimum Throw (m) Maximum Throw (m)
150 x 150 100 2 9 17 0.4 1.4
150 3 15 19 1.2 2.5
225 x 225 100 2 15 <22 0.5 1.5
150 3 35 28 1.4 3.2
300 x 300 150 1.7 12 <22 0.9 2.7
200 2.2 19 23 1.4 3.3
250 2.8 31 26 2.2 4.2
300 3.3 42 31 2.8 4.6
375 x 375 250 1.8 13 <22 1.3 3.4
300 2.1 18 <22 1.5 3.9
350 2.5 26 28 1.7 4.6
400 2.9 32 31 2.1 5.0
450 3.2 39 35 2.7 5.2
450 x 450 350 1.7 12 25 1.2 3.8
400 2 15 26 1.4 4.2
450 2.2 20 29 2 4.8
500 2.5 25 32 2.7 5.4
550 2.7 30 33 3.1 5.8
600 3 35 35 3.5 6.2

Note: The above sizes are based on a 4-way throw

3-way x Air Quantity x 0.75

2-way x Air Quantity x 0.50

 

Opposed Blade Dampers - Effect of Volume Control on Noise Levels

The additional noise level for diffusers with Opposed Blade Dampers installed is set out in the following table:

NR Addition for OBD
Diffuser with OBD Fully Open 50% Closed
NR 25 or less 1 5
NR 30 1 6
NR35 2 8

Also available as Double Tile 4-Way Blow Diffuser

Item # Description Colour
248100 1195 x 595mm (Face size) 1050x450 Neck Size / 4 Way Blow LFD RAL9010
248100 + OBD 1195 x 595mm (Face size) 1050x450 Neck Size / 4 Way Blow LFD + OBD RAL9010