Round Ceiling Diffuser

FixedRCD

CD Fixed1 CD Fixed2 FCD
CD Fixed1 CD Fixed2 FCD

The Polyaire Round Ceiling Diffusers provide an alternative to the conventional square diffusers for both ceiling supply and extract applications.

They can be mounted on exposed ductwork or flush with a conventional ceiling and are capable of handling high air volumes at comparatively low sound levels and give a smooth even distribution of air.

All aluminium construction.

Comes with removable core (on springs).

Standard colour is RAL 9010. Alternative colours are available so suit the interior requirements.

Dimensions

Size (mm) Neck (C) Face (D) (B) Height (H)
150 148 300 230 65
200 198 350 280 65
250 248 400 335 65
300 299 450 380 65
350 348 500 425 65
400 398 560 495 65

Order Selection

Item # Description
238150 150mm - Round Ceiling Diffuser - 148mm Ø Neck / 300mm Ø Face
238200 200mm - Round Ceiling Diffuser - 198mm Ø Neck / 350mm Ø Face 
238250 250mm - Round Ceiling Diffuser - 248mm Ø Neck / 400mm Ø Face
238300 300mm - Round Ceiling Diffuser - 299mm Ø Neck / 450mm Ø Face
238350 350mm - Round Ceiling Diffuser - 348mm Ø Neck / 500mm Ø Face
238400 400mm - Round Ceiling Diffuser - 398mm Ø Neck / 560mm Ø Face 

Technical Data

Neck Size Air l/s Throw m. NR Pressure PA Neck Velocity
150 20 0.4 - 2 1.13
30 0.7 - 4 1.70
40 1.1 12 10 2.25
50 1.4 25 16 2.80
60 1.9 37 18 3.40
           
200 40 0.8 - 3 1.27
50 1.0 12 5 1.60
60 1.4 21 8 1.90
70 1.7 30 12 2.2
80 2.0 36 15 2.55
           
250 50 0.8 - 2 1.02
60 1.0 15 4 1.22
75 1.3 24 6 1.53
85 1.5 28 8 1.73
100 1.8 33 12 2.04
           
300 80 0.8 - 2 1.13
95 1.1 12 4 1.34
110 1.3 24 7 1.55
130 1.6 29 9 1.84
150 2.0 34 12 2.12
           
400 125 1.2 - 2 1.0
150 1.5 10 3 1.2
175 1.8 14 5 1.4
200 2.0 25 7 1.6
225 2.2 29 9 1.8
250 2.6 34 11 2.0