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PAGE : 1 OF 4
Project Name:NAS
External Static Pressure Calculation-AHU-CP-GF-11
SEC DESCRIPTION
NO PIPE / FITTING L/S Width Height m/s Pa m
SUPPLY SIDE Pa / m Pa Pa
1 Transition 1270 10 400 5.00 15.05 0.42 6.32
Duct 1270 800 400 4.36 11.40 1.52 0.34 0.52
Sound Attenuator 1270 50.00
Elbow (45) 1270 600 350 4.36 11.40 0.31 3.53
Tee Main 1270 800 400 4.36 11.40 0.04 0.46
60.83
2 Duct 1114 800 350 4.42 11.87 1.52 0.38 0.58
Tee Branch 1114 800 350 4.42 11.87 0.74 8.78
9.36
3 Duct 958 600 400 4.30 11.22 2.61 0.391 1.02
VCD 958 600 400 4.30 11.22 8.00
Tee Main 958 600 400 4.30 11.22 0.05 0.56
9.58
4 Duct 802 600 350 4.14 10.43 2.57 0.398 1.02
Elbow (90) 802 600 350 4.14 10.43 0.51 5.32
Tee Main 802 600 350 4.14 10.43 0.05 0.52
6.87
5 Duct 646 600 300 3.94 9.43 4.03 0.401 1.62
Tee Main 646 600 300 3.94 9.43 0.04 . 0.38
1.99
6 Duct 490 550 250 3.93 9.45 3.41 0.477 1.63
Tee Main 490 550 250 3.93 9.45 0.07 0.66
2.29
7 Duct 334 400 250 3.60 7.86 3.34 0.481 1.61
Tee Main 334 400 250 3.60 7.86 0.16 1.26
2.86
8 Duct 178 350 200 2.76 4.65 3.34 0.369 1.23
Tee Main 178 350 200 2.76 4.65 0.19 0.88
2.12
9 Duct 156 350 200 2.42 3.57 3.48 0.29 1.01
Elbow (90) 156 350 200 2.42 3.57 0.51 1.82
Tee Branch 1114 350 200 2.42 3.57 0.73 2.61
Diffuser 156 300 300 10.00
15.44
111.34
SAFETY MARGIN 20% 22.27GRAND TOTAL 133.60
TOTAL EXTERNAL STATIC PRESSURE REQUIRED FOR FAN IS 134Pa
AIRFLOW
DUCT SIZE(mm)
VELOCITY
VELOCITY PRESSURE LENGTH
Fitting loss Coefficient
DUCT PRESSURE
LOSS
TOTAL PRESSURE
LOSS
SECTION PRESSURE
LOSS
PAGE : 2 OF 4
Project Name:SOUND STAGES COMPLEX AT DUBAI STUDIO CITY
External Static Pressure Calculation-AHU-CP-GF-19
SEC DESCRIPTION
NO PIPE / FITTING L/S Width Height m/s Pa m
Pa/m Pa Pa
SUPPLY SIDE1 Transition 6109 1500 600 8.00 38.5 0.42 16.17
Duct 6109 1500 600 7.61 35.2 3.7 0.53 1.96
Sound Attenuator 6109 50.00
Tee main 6109 1500 600 7.61 35.2 0.04 1.41
69.54
2 Duct 5702 1500 600 7.10 31 1.85 0.47 0.87
Tee main 5702 1500 600 7.10 31 0.04 1.23
2.10
3 Duct 4887 1500 600 6.09 22.53 2.12 0.35 0.74
Tee main 4887 1500 600 6.09 22.53 0.04 0.90
1.64
4 Duct 4480 1300 650 5.82 20.58 3.85 0.33 1.27
Tee branch 4480 1300 650 5.82 20.58 0.97 19.96
VCD 4480 1300 650 5.82 20.58 15.00
36.23
5 Duct 2036 950 450 5.25 16.76 6.32 0.41 2.59
Tee main 2036 950 450 5.25 16.76 0.05 0.84
3.43
6 Duct 1629 900 400 5.02 15.31 3.97 0.42 1.67
Tee main 1629 900 400 5.02 15.31 0.11 1.68
3.35
7 Duct 1222 800 400 4.19 10.68 3.91 0.32 1.25
Tee main 1222 800 400 4.19 10.68 0.04 0.43
1.68
8 Duct 815 700 300 4.32 11.34 3.89 0.44 1.71
Tee main 815 700 300 4.32 11.34 0.1 1.13
2.85
9 Duct 407 500 250 3.57 7.76 5.57 0.42 2.34
Tee branch 407 500 250 3.57 7.76 0.73 5.66
Diffuser 407 450 450 2.14 2.79 10
18.00
138.82SAFETY MARGIN 20% 27.76
GRAND TOTAL 166.58
TOTAL EXTERNAL STATIC PRESSURE REQUIRED FOR FAN IS 167 Pa
AIRFLOW
DUCT SIZE(mm)
VELOCITY
VELOCITY PRESSURE LENGTH
Fitting loss Coefficient
DUCT PRESSURE
LOSS
TOTAL PRESSURE
LOSS
SECTION PRESSURE
LOSS
PAGE : 3 OF 4
Project Name:NAS
External Static Pressure Calculation-AHU-CP-GF-09
SEC DESCRIPTION
NO PIPE / FITTING L/S Width Height m/s Pa m
SUPPLY SIDE1 Transition 1425 850 400 5.00 15.05 0.42 6.32
Duct 1425 850 400 4.62 13.00 3 0.37 1.11
Sound Attenuator 1425 50.00
Tee branch 1425 850 400 4.62 13.00 0.72 9.36
66.79
2 Duct 1188 700 400 3.85 9.03 2.35 0.26 0.61
Elbow (45) 1188 700 400 3.85 9.03 0.31 2.80
Tee Main 1188 700 400 3.85 9.03 0.04 0.36
3.77
3 Duct 1069 700 400 4.15 10.46 1.98 0.34 0.67
Tee branch 1069 700 400 4.15 10.46 1.14 11.92
VCD 1069 700 400 4.15 10.46 40.00
52.59
4 Duct 475 500 300 3.43 7.15 3.23 0.34 1.10
Tee Main 475 500 300 3.43 7.15 0.04 0.29
1.38
5 Duct 356 450 250 3.44 7.21 1.89 0.41 0.77
Elbow (90) 356 450 250 3.44 7.21 0.51 3.68
Tee Main 356 450 250 3.44 7.21 0.1 0.72
5.17
6 Duct 238 350 250 2.92 5.19 2.19 0.35 0.77
Tee Main 238 350 250 2.92 5.19 0.08 0.42
1.18
7 Duct 119 250 200 2.54 3.93 3.16 0.37 1.17
Elbow (90) 119 250 200 2.54 3.93 0.47 1.85
Tee branch 119 250 200 2.54 3.93 0.73 2.87
Diffuser 119 225 225 2.51 3.82 10.00
15.89
146.78SAFETY MARGIN 20% 29.36
GRAND TOTAL 176.13
TOTAL EXTERNAL STATIC PRESSURE REQUIRED FOR FAN IS177 Pa
AIRFLOW
DUCT SIZE(mm)
VELOCITY
VELOCITY PRESSURE LENGTH
Fitting loss Coefficient
DUCT PRESSURE
LOSS (pa/m)
TOTAL PRESSURE
LOSS(pa)
SECTION PRESSURE
LOSS
PAGE : 4 OF 4
Project Name:NAS
External Static Pressure Calculation-AHU-CP-GF-11
SEC DESCRIPTION
NO PIPE / FITTING L/S Width Height m/s Pa m
RETURN SIDE Pa / m Pa Pa
1 Grile 410 1000 250 1.95 2.32 10.00
Plenum box 410 1000 250 1.95 2.32 0.1 0.09 0.01
Firedamper 410 1000 250 1.95 2.32 0.19 0.44
Transition 410 400 300 3.66 8.15 1.73 14.10
Duct 410 400 300 3.66 8.15 2.2 0.44 0.97
Elbow (90) 410 400 300 3.66 8.15 0.48 3.91
Plenum box 410 450 350 3.66 8.15 1.78 0.22 0.40
29.83
SUPPLY SIDE
2 Transition 410 400 300 4.16 10.38 1.73 17.96
Duct 410 400 300 3.66 8.15 1.12 0.44 0.49
Transition 410 400 300 3.66 8.15 1.73 14.10
Firedamper 410 1000 250 1.95 2.32 0.19 0.44
Plenum box 410 1000 250 1.95 2.32 0.1 0.09 0.01
Grile 410 1000 250 1.95 2.32 10.00
43.00
72.82
SAFETY MARGIN 20% 14.56GRAND TOTAL 87.39
TOTAL EXTERNAL STATIC PRESSURE REQUIRED FOR FAN IS87Pa
AIRFLOW
DUCT SIZE(mm)
VELOCITY
VELOCITY PRESSURE LENGTH
Fitting loss Coefficient
DUCT PRESSURE
LOSS
TOTAL PRESSURE
LOSS
SECTION PRESSURE
LOSS
