Square Swirl Diffusers PSA

Model PSAPSA

247090 SquareSwirlDiffuserPSA Com 247090 SquareSwirlDiffuserPSA CDia 2 247090 SquareSwirlDiffuserPSA CDia 1
247090 SquareSwirlDiffuserPSA Com 247090 SquareSwirlDiffuserPSA CDia 2 247090 SquareSwirlDiffuserPSA CDia 1

The Polyaire PSA Swirl Diffuser promotes high entrainment of ambient air into the supply air stream. The helical airflow reduces air velocity and provides a consistent spread resulting in relatively uniform temperature, humidity and air quality in all parts of the occupied space.

During cooling the warmest air in the room is immediately mixed with the supply air and temperature variation around the space (hot & cold spots) is minimised. During heating, the high induction of the room air by the supply swirl ensures sufficient air diffusion to minimise stratification and stagnant areas in the space.

They are suitable for use in both constant volume flow and VAV systems and are suitable for all types of installation in closed ceilings, above open grid ceilings and in ceiling panels.

The standard PSA is made of cold rolled galvanized plate steel powder coated white (RAL9010). Other finishes are available to suit the interior and architectural design requirements. The face plate is 595mm square and suitable for surface mounting in the ceiling or alternatively as a lay-in for T-Bar ceiling installations.

Model PSA

Sizes Available/Dimensions
Item #  Face Size/Neck Size (mm) Q A V
mm inch mm inch mm inch
247090 PSA Q 595/198 595 23” 198 8” 120 5”
247091 PSA Q 595/248 595 23” 248 10” 120 5”
247092 PSA Q 595/313 595 23” 313 12” 125 5”
247093 PSA Q 595/398 595 23” 398 16” 125 5”

 

247090 SquareSwirlDiffuserPSA CDia 1247090 SquareSwirlDiffuserPSA CDia 2


Air volume, pressure loss and noise level


S/G: Installed inside of the ceiling with diffusing ring;


N/G: Installed inside of the ceiling without diffusing ring;


S/W: Hung with diffusing ring;


N/W: Hung without diffusing ring;

Model PSA - Quick Selection
Specs Air Volume m3/h N/G N/W S/G S/W
Pressure Loss (Pa) Noise (dB) Pressure Loss (Pa) Noise (dB) Pressure Loss (Pa) Noise (dB) Pressure Loss (Pa) Noise (dB)
198 100 11 20 14 21 5.3 <20 6.2 <20
125 16.5 26 21.5 27 8 <20 9.5 21
150 25 32 31 34 12 24 14 25
175 31 36 40 38 38 28 19 29
200 40 39 54 41 21 33 26 34
225 54 43 76 45 25 35 31 36
250 64 46 81 48 32 38 39 39
275 77 48 96 50 38 40 46 42
300 - - - - 49 43 60 45
350 - - - - 64 47 78 49
248 100 2 <20 4 <20 - <20 - <20
150 10 <20 12 20 5 <20 6.5 <20
175 13 23 14 24 6.5 <20 8.5 <20
200 17 27 19 28 8.5 <20 12 20
250 27 33 30 34 13 24 17 26
300 39 39 45 40 19 29 26 32
350 52 43 60 44 25  33 33 36
400 64 47 78 48 35  37 44 40
450 88 51 100 52 41 41 55 44
500 - - - - 49 43 60 46
313 200 3 <20 6 <20 - <20 - <20
250 8 <20 9 <20 - <20 6 <20
300 12 26 13 27 6 <20 9.5 22
350 16 30 17 31 8 23 12.5 26
400 21 35 22 36 11 28 16 30
500 34 42 36 43 16 34 25 37
600 49 48 51 49 24 40 37 43
700 69 54 72 55 32 44 48 47
800  -  -  -  - 41 48 62 52
398 300 8 23 6 <20 4 <20 5 <20
400 12 30 11 24 7 <20 7 <20
500 20 35 16 30 11 25 11 26
700 40 45 25 39 21 35 28 34
900 71 54 55 47 35 42 47 45
1200 121 69 95 68 58 48 70 53