Perforated Diffuser with Dropped Plaque
Model DP-DFP

 

The frame incoporates an aerodynamic anti-smudge design and can be supplied with clips for fitting into a 'burgess type' ceiling.  The diffuser is also suitable for a T grid ceiling or for fixing into a 'lay-in' exposed T arrangement (595 overall).

NOTES:
1. Perforated plaques are removable for access
2. DP-DFP types can be configured for 1,2,3 or 4-way throw.
3. Suffix 'R' denotes integral opposed blade damper.

Finish
Standard finish is white with matt black internal components.  Other finishes are available on request.

Unless otherwise specified diffusers will be supplied with standard finish and fixings.

Model DP-DFP Technical Data

Supply Performance Data
Model DP-DFP(1 - 4)-0(-R).  Overall size to suit a 600mm square ceiling grid with a 300mm diameter neck.

Volume l/s 150 200 250 300 350
Neck Velocity m/s 2.1 2.9 3.6 4.3 5.0
Total Pressure Pa 5 10 16 22 28
Sound Power NRLW 24 32 38 44 48
Throw A metre 1.1 2.0 2.4 2.9 3.4
Throw B metre 1.8 2.4 2.8 3.4 4.4
Throw C metre 2.2 3.1 4.3 5.6 6.8

Throws are to a terminal velocity of 0.5m/s.
For DP-DFP(1 - 4)(-R) with 450mm square neck: - Throw x 0.7; - Total Pressure x 0.7; Sound Power Level deduct 7NR.

For supply cooling applications we do not recommend an effective neck velocity below 1.0 m/s.

Exhaust Performance Data
Model DP-DFPE - 0.  To suit 600mm square ceiling grid with 300mm diameter neck.

Volume l/s 150 200 250 300 350 400
Neck Velocity m/s 2.1 2.9 3.6 4.3 5.0 5.7
Total Pressure Pa 3 6 12 18 23 27
Sound Power NRLW --- 23 29 35 43 47

Model DP-DFPE - 0.  To suit 600mm square ceiling grid with 450mm square neck.

Volume l/s 150 250 350 450 550 650
Neck Velocity m/s 0.75 1.25 1.75 2.25 2.75 3.25
Total Pressure Pa -- 3 5 10 16 25
Sound Power NRLW --- -- 23 29 36 42

Sound power levels are given.  For most applications 4NR may be subtracted to allow for absorbtion.

 
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