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7/30/2019 Static Calculation for Fans
1/4
STATIC PRESSURE CALCULATION FOR DUCT SYSTEM
Project :
Location : Date :
Eqp. No. : Rev No. :
A) Straight Duct Auth. Code => 6175007
Duct Air Duct Rough Hydr. Velocity Pres. Loss Pres. Loss Total
Section Width Height Flow Lgth Factor Dia. Pressure per 100 ft per meter As/Ac Qs/Qc Cs from Duct Reducer Pres. Loss dia. Air Vel.
No. (mm) (mm) (cfm) (m) (mm) Dh (mm) (fpm) (m/s) (inWG) (inWG) (Pa/m) (inWG) (inWG) (inWG) (mm) (fpm)
1 4,300 1,400 110,785 7.0 0.09 2,112 1,710 8.7 0.18 0.03 0.26 0.60 0.40 0.13 0.007 0.024 0.031 2584 1,963
2 1,800 2,000 44,406 2.5 0.09 1,895 1,146 5.8 0.08 0.02 0.14 0.001 0.001 2073 1,222
3 0.09
4 0.09
5 2,500 1,000 44,406 1.8 0.09 1,429 1,650 8.4 0.17 0.05 0.39 1.02 1.00 0.003 0.003 1685 1,850
6 3,200 800 44,406 18.8 0.09 1,280 1,612 8.2 0.16 0.05 0.42 0.89 0.89 0.04 0.032 0.006 0.038 1654 1,920
7 2,850 800 39,472 12.9 0.09 1,249 1,608 8.2 0.16 0.05 0.43 0.88 0.88 0.04 0.022 0.006 0.029 1574 1,884
8 2,850 700 34,538 11.9 0.09 1,124 1,608 8.2 0.16 0.06 0.49 0.86 0.86 0.04 0.024 0.006 0.030 1458 1,921
9 2,450 700 29,604 10.5 0.09 1,089 1,604 8.1 0.16 0.06 0.51 0.84 0.83 0.04 0.021 0.006 0.028 1367 1,874
10 2,050 700 24,670 14.2 0.09 1,044 1,597 8.1 0.16 0.06 0.53 0.82 0.80 0.04 0.030 0.006 0.037 1265 1,823
11 1,950 600 19,736 10.6 0.09 918 1,567 8.0 0.15 0.07 0.60 0.77 0.75 0.04 0.025 0.006 0.032 1135 1,813
12 1,500 600 14,802 12.6 0.09 857 1,528 7.8 0.15 0.08 0.62 0.67 0.67 0.04 0.031 0.006 0.037 1011 1,713
13 1,200 500 9,868 12.4 0.09 706 1,528 7.8 0.15 0.10 0.78 0.67 0.50 0.10 0.039 0.015 0.053 827 1,705
14 800 500 4,934 4.9 0.09 615 1,146 5.8 0.08 0.07 0.54 1.00 0.50 0.011 0.011 687 1,238
15 800 500 2,467 4.9 0.09 615 573 2.9 0.02 0.02 0.15 0.003 0.003 687 619
0.333
B) Duct Fitting
i. Elbow
Duct Velocity Guide Vane Angle Ftg. Loss Total
Section Width Height Pressure H/W Vane Cp Radius R1 Qty Factor Coef. Pres. Loss(mm) (mm) (inWG) (mm) K Co (inWG)
6 3,200 800 0.16 0.25 TRUE 90 5 0.28 1,385 1 1.00 0.280 0.045
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
0.045
ii. Damper or Wye Bl ade Size= 100 mm
Duct Velocity Perimeter Ftg. Loss Total
Section Width Height Pressure of Duct L/R Qty Coef. Pres. Loss
(mm) (mm) (inWG) R, (in) Co (inWG)
1 4,300 1,400 0.18 1 5 0.60 0.109
2 1,800 2,000 0.08 1 5 0.60 0.049
2 1,800 2,000 0.08 1 5 2.00 0.164
5 2,500 1,000 0.17 1 0.60 0.102
0.424
C) Static Pressure Loss from Other Ductwork Accessories
Pressure Total
No. Description Qty Loss Pres. Loss
W(mm) H(mm) Cfm L/R Co Loss("wg) (inWG) (inWG)
i. Furthest point of the air terminal unit 1,000 400 1,234 3.57 9.51 0.05 1 0.05 0.05
ii. External lourve 10,000 4,500 110,785 38.97 14.27 0.05 1 0.05 0.05
iii. One length of flexible duct 0.05
iv. Premary filter 0.18
v. Secondary filter 0.78
vi. VAV box 0.30
vii. Kitchen Hood 0.50
viii. Silencer 0.25
0.100
Safety Factor 15.0% => 0.14
Total Static Pressure (In. wg) => 1.04
(Pa) => 259.3
Eqv. Rnd Duct
Velocity
Static Pressure Loss of Straight Duct =>
Duct Size Throat
MATRADE
BASEMENT 1
SSF-B1-Z3-1 (NM) Rev. 1
Duct Size Air Duct Pres. Loss
0.66 500
r/W Turning Angle Radius, R (mm)
L, (in) (0, 30, 45, 60 deg.)
4 6
Static Pressure Loss of Elbow =>
Duct Size Total Damper Damper
Fitting Type Blade Length Angle
1
4 6
4 6
3 5
Static Pressure Loss of Damper or Wye =>
Vel. (Fpm)
287
229
Static Pressure Loss from Other Ductwork Accessories =>
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
YesYes
YesYes
YesYes
YesYes
YesYes
Yes
-
7/30/2019 Static Calculation for Fans
2/4
STATIC PRESSURE CALCULATION FOR DUCT SYSTEM
Project :
Location : Date :
Eqp. No. : Rev No. :
A) Straight Duct Auth. Code => 6175007
Duct Air Duct Rough Hydr. Velocity Pres. Loss Pres. Loss Total
Section Width Height Flow Lgth Factor Dia. Pressure per 100 ft per meter As/Ac Qs/Qc Cs from Duct Reducer Pres. Loss dia. Air Vel.
No. (mm) (mm) (cfm) (m) (mm) Dh (mm) (fpm) (m/s) (inWG) (inWG) (Pa/m) (inWG) (inWG) (inWG) (mm) (fpm)
1 4,300 1,400 169,059 7.0 0.09 2,112 2,609 13.3 0.42 0.07 0.58 0.60 0.40 0.13 0.016 0.055 0.071 2584 2,996
2 1,800 2,000 67,765 2.5 0.09 1,895 1,749 8.9 0.19 0.04 0.31 0.003 0.003 2073 1,864
3 0.09
4 0.09
5 2,500 1,000 67,765 1.8 0.09 1,429 2,518 12.8 0.40 0.11 0.86 1.02 1.00 0.006 0.006 1685 2,823
6 3,200 800 67,765 18.8 0.09 1,280 2,459 12.5 0.38 0.12 0.94 0.89 0.89 0.04 0.071 0.015 0.086 1654 2,929
7 2,850 800 60,235 12.9 0.09 1,249 2,454 12.5 0.38 0.12 0.97 0.88 0.88 0.04 0.050 0.015 0.065 1574 2,875
8 2,850 700 52,706 11.9 0.09 1,124 2,454 12.5 0.38 0.13 1.10 0.86 0.86 0.04 0.052 0.015 0.067 1458 2,931
9 2,450 700 45,176 10.5 0.09 1,089 2,447 12.4 0.37 0.14 1.13 0.84 0.83 0.04 0.048 0.015 0.063 1367 2,859
10 2,050 700 37,647 14.2 0.09 1,044 2,437 12.4 0.37 0.14 1.18 0.82 0.80 0.04 0.067 0.015 0.082 1265 2,782
11 1,950 600 30,118 10.6 0.09 918 2,391 12.2 0.36 0.16 1.33 0.77 0.75 0.04 0.057 0.014 0.071 1135 2,766
12 1,500 600 22,588 12.6 0.09 857 2,332 11.8 0.34 0.17 1.38 0.67 0.67 0.04 0.070 0.014 0.083 1011 2,614
13 1,200 500 15,059 12.4 0.09 706 2,332 11.8 0.34 0.21 1.74 0.67 0.50 0.10 0.086 0.034 0.120 827 2,602
14 800 500 7,529 4.9 0.09 615 1,749 8.9 0.19 0.15 1.19 1.00 0.50 0.023 0.023 687 1,889
15 800 500 3,765 4.9 0.09 615 874 4.4 0.05 0.04 0.33 0.006 0.006 687 944
0.749
B) Duct Fitting
i. Elbow
Duct Velocity Guide Vane Angle Ftg. Loss Total
Section Width Height Pressure H/W Vane Cp Radius R1 Qty Factor Coef. Pres. Loss(mm) (mm) (inWG) (mm) K Co (inWG)
6 3,200 800 0.38 0.25 TRUE 90 5 0.28 1,385 1 1.00 0.280 0.106
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
0.106
ii. Damper or Wye Bl ade Size= 100 mm
Duct Velocity Perimeter Ftg. Loss Total
Section Width Height Pressure of Duct L/R Qty Coef. Pres. Loss
(mm) (mm) (inWG) R, (in) Co (inWG)
1 4,300 1,400 0.42 1 5 0.60 0.255
2 1,800 2,000 0.19 1 5 0.60 0.114
2 1,800 2,000 0.19 1 5 2.00 0.381
5 2,500 1,000 0.40 1 0.60 0.237
0.988
C) Static Pressure Loss from Other Ductwork Accessories
Pressure Total
No. Description Qty Loss Pres. Loss
W(mm) H(mm) Cfm L/R Co Loss("wg) (inWG) (inWG)
i. Furthest point of the air terminal unit 1,000 400 1,882 3.57 9.51 0.12 1 0.12 0.12
ii. External lourve 10,000 4,500 169,059 38.97 14.27 0.11 1 0.11 0.11
iii. One length of flexible duct 0.05
iv. Premary filter 0.18
v. Secondary filter 0.78
vi. VAV box 0.30
vii. Kitchen Hood 0.50
viii. Silencer 0.25
0.230
Safety Factor 15.0% => 0.31
Total Static Pressure (In. wg) => 2.38
(Pa) => 595.6
Eqv. Rnd Duct
Velocity
Static Pressure Loss of Straight Duct =>
Duct Size Throat
MATRADE
BASEMENT 1
SSF-B1-Z3-1 (FM) Rev. 1
Duct Size Air Duct Pres. Loss
0.66 500
r/W Turning Angle Radius, R (mm)
L, (in) (0, 30, 45, 60 deg.)
4 6
Static Pressure Loss of Elbow =>
Duct Size Total Damper Damper
Fitting Type Blade Length Angle
1
4 6
4 6
3 5
1
Static Pressure Loss of Damper or Wye =>
Vel. (Fpm)
437
349
Static Pressure Loss from Other Ductwork Accessories =>
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
YesYes
YesYes
YesYes
YesYes
YesYes
Yes
-
7/30/2019 Static Calculation for Fans
3/4
STATIC PRESSURE CALCULATION FOR DUCT SYSTEM
Project :
Location : Date :
Eqp. No. : Rev No. :
A) Straight Duct Auth. Code => 6175007
Duct Air Duct Rough Hydr. Velocity Pres. Loss Pres. Loss Total
Section Width Height Flow Lgth Factor Dia. Pressure per 100 ft per meter As/Ac Qs/Qc Cs from Duct Reducer Pres. Loss dia. Air Vel.
No. (mm) (mm) (cfm) (m) (mm) Dh (mm) (fpm) (m/s) (inWG) (inWG) (Pa/m) (inWG) (inWG) (inWG) (mm) (fpm)
1 4,300 1,400 110,785 7.0 0.09 2,112 1,710 8.7 0.18 0.03 0.26 0.60 0.40 0.13 0.007 0.024 0.031 2584 1,963
2 1,800 2,000 44,406 5.0 0.09 1,895 1,146 5.8 0.08 0.02 0.14 0.003 0.003 2073 1,222
3 0.09
4 0.09
5 2,500 1,000 44,406 3.3 0.09 1,429 1,650 8.4 0.17 0.05 0.39 1.02 1.00 0.005 0.005 1685 1,850
6 3,200 800 44,406 12.5 0.09 1,280 1,612 8.2 0.16 0.05 0.42 0.89 0.89 0.04 0.021 0.006 0.028 1654 1,920
7 2,850 800 39,472 10.1 0.09 1,249 1,608 8.2 0.16 0.05 0.43 0.88 0.88 0.04 0.018 0.006 0.024 1574 1,884
8 2,850 700 34,538 14.1 0.09 1,124 1,608 8.2 0.16 0.06 0.49 0.86 0.86 0.04 0.028 0.006 0.034 1458 1,921
9 2,450 700 29,604 10.6 0.09 1,089 1,604 8.1 0.16 0.06 0.51 0.84 0.83 0.04 0.022 0.006 0.028 1367 1,874
10 2,050 700 24,670 10.6 0.09 1,044 1,597 8.1 0.16 0.06 0.53 0.82 0.80 0.04 0.023 0.006 0.029 1265 1,823
11 1,950 600 19,736 10.6 0.09 918 1,567 8.0 0.15 0.07 0.60 0.77 0.75 0.04 0.025 0.006 0.032 1135 1,813
12 1,500 600 14,802 12.5 0.09 857 1,528 7.8 0.15 0.08 0.62 0.67 0.67 0.04 0.031 0.006 0.037 1011 1,713
13 1,200 500 9,868 12.4 0.09 706 1,528 7.8 0.15 0.10 0.78 0.67 0.50 0.10 0.039 0.015 0.053 827 1,705
14 800 500 4,934 4.9 0.09 615 1,146 5.8 0.08 0.07 0.54 1.00 0.50 0.011 0.011 687 1,238
15 800 500 2,467 4.9 0.09 615 573 2.9 0.02 0.02 0.15 0.003 0.003 687 619
0.317
B) Duct Fitting
i. Elbow
Duct Velocity Guide Vane Angle Ftg. Loss Total
Section Width Height Pressure H/W Vane Cp Radius R1 Qty Factor Coef. Pres. Loss(mm) (mm) (inWG) (mm) K Co (inWG)
2 1,800 2,000 0.08 1.11 FALSE 30 2 0.21 2 0.45 0.095 0.015
6 3,200 800 0.16 0.25 TRUE 90 5 0.09 2,773 2 1.00 0.090 0.029
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 30 2 0.45
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
0.045
ii. Damper or Wye Bl ade Size= 100 mm
Duct Velocity Perimeter Ftg. Loss Total
Section Width Height Pressure of Duct L/R Qty Coef. Pres. Loss
(mm) (mm) (inWG) R, (in) Co (inWG)
1 4,300 1,400 0.18 1 5 0.60 0.109
2 1,800 2,000 0.08 1 5 0.60 0.049
2 1,800 2,000 0.08 1 5 2.00 0.164
0.322
C) Static Pressure Loss from Other Ductwork Accessories
Pressure Total
No. Description Qty Loss Pres. Loss
W(mm) H(mm) Cfm L/R Co Loss("wg) (inWG) (inWG)
i. Furthest point of the air terminal unit 1,000 400 1,234 3.57 9.51 0.05 1 0.05 0.05
ii. External lourve 10,000 4,500 110,785 38.97 14.27 0.05 1 0.05 0.05
iii. One length of flexible duct 0.05
iv. Premary filter 0.18
v. Secondary filter 0.78
vi. VAV box 0.30
vii. Kitchen Hood 0.50
viii. Silencer 0.25
0.100
Safety Factor 15.0% => 0.12
Total Static Pressure (In. wg) => 0.90
(Pa) => 225.5
Eqv. Rnd Duct
Velocity
Static Pressure Loss of Straight Duct =>
Duct Size Throat
MATRADE
BASEMENT 1
SSF-B1-Z3-2 (NM) Rev. 1
Duct Size Air Duct Pres. Loss
1.00 900
1.00 1,600
r/W Turning Angle Radius, R (mm)
L, (in) (0, 30, 45, 60 deg.)
4 6
Static Pressure Loss of Elbow =>
Duct Size Total Damper Damper
Fitting Type Blade Length Angle
1
1
4 6
3 5
Static Pressure Loss of Damper or Wye =>
Vel. (Fpm)
287
229
Static Pressure Loss from Other Ductwork Accessories =>
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
YesYes
YesYes
YesYes
YesYes
YesYes
Yes
-
7/30/2019 Static Calculation for Fans
4/4
STATIC PRESSURE CALCULATION FOR DUCT SYSTEM
Project :
Location : Date :
Eqp. No. : Rev No. :
A) Straight Duct Auth. Code => 6175007
Duct Air Duct Rough Hydr. Velocity Pres. Loss Pres. Loss Total
Section Width Height Flow Lgth Factor Dia. Pressure per 100 ft per meter As/Ac Qs/Qc Cs from Duct Reducer Pres. Loss dia. Air Vel.
No. (mm) (mm) (cfm) (m) (mm) Dh (mm) (fpm) (m/s) (inWG) (inWG) (Pa/m) (inWG) (inWG) (inWG) (mm) (fpm)
1 4,300 1,400 169,059 7.0 0.09 2,112 2,609 13.3 0.42 0.07 0.58 0.60 0.40 0.13 0.016 0.055 0.071 2584 2,996
2 1,800 2,000 67,765 5.0 0.09 1,895 1,749 8.9 0.19 0.04 0.31 0.006 0.006 2073 1,864
3 0.09
4 0.09
5 2,500 1,000 67,765 3.3 0.09 1,429 2,518 12.8 0.40 0.11 0.86 1.02 1.00 0.011 0.011 1685 2,823
6 3,200 800 67,765 12.5 0.09 1,280 2,459 12.5 0.38 0.12 0.94 0.89 0.89 0.04 0.047 0.015 0.062 1654 2,929
7 2,850 800 60,235 10.1 0.09 1,249 2,454 12.5 0.38 0.12 0.97 0.88 0.88 0.04 0.039 0.015 0.054 1574 2,875
8 2,850 700 52,706 14.1 0.09 1,124 2,454 12.5 0.38 0.13 1.10 0.86 0.86 0.04 0.062 0.015 0.077 1458 2,931
9 2,450 700 45,176 10.6 0.09 1,089 2,447 12.4 0.37 0.14 1.13 0.84 0.83 0.04 0.048 0.015 0.063 1367 2,859
10 2,050 700 37,647 10.6 0.09 1,044 2,437 12.4 0.37 0.14 1.18 0.82 0.80 0.04 0.050 0.015 0.065 1265 2,782
11 1,950 600 30,118 10.6 0.09 918 2,391 12.2 0.36 0.16 1.33 0.77 0.75 0.04 0.057 0.014 0.071 1135 2,766
12 1,500 600 22,588 12.5 0.09 857 2,332 11.8 0.34 0.17 1.38 0.67 0.67 0.04 0.069 0.014 0.083 1011 2,614
13 1,200 500 15,059 12.4 0.09 706 2,332 11.8 0.34 0.21 1.74 0.67 0.50 0.10 0.086 0.034 0.120 827 2,602
14 800 500 7,529 4.9 0.09 615 1,749 8.9 0.19 0.15 1.19 1.00 0.50 0.023 0.023 687 1,889
15 800 500 3,765 4.9 0.09 615 874 4.4 0.05 0.04 0.33 0.006 0.006 687 944
0.715
B) Duct Fitting
i. Elbow
Duct Velocity Guide Vane Angle Ftg. Loss Total
Section Width Height Pressure H/W Vane Cp Radius R1 Qty Factor Coef. Pres. Loss(mm) (mm) (inWG) (mm) K Co (inWG)
2 1,800 2,000 0.19 1.11 FALSE 30 2 0.21 2 0.45 0.095 0.036
6 3,200 800 0.38 0.25 TRUE 90 5 0.09 2,773 2 1.00 0.090 0.068
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
FALSE 90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
90 5 1.00
0.104
ii. Damper or Wye Bl ade Size= 100 mm
Duct Velocity Perimeter Ftg. Loss Total
Section Width Height Pressure of Duct L/R Qty Coef. Pres. Loss
(mm) (mm) (inWG) R, (in) Co (inWG)
1 4,300 1,400 0.42 1 5 0.60 0.255
2 1,800 2,000 0.19 1 5 0.60 0.114
2 1,800 2,000 0.19 1 5 2.00 0.381
0.750
C) Static Pressure Loss from Other Ductwork Accessories
Pressure Total
No. Description Qty Loss Pres. Loss
W(mm) H(mm) Cfm L/R Co Loss("wg) (inWG) (inWG)
i. Furthest point of the air terminal unit 1,000 400 1,882 3.57 9.51 0.12 1 0.12 0.12
ii. External lourve 10,000 4,500 169,059 38.97 14.27 0.11 1 0.11 0.11
iii. One length of flexible duct 0.05
iv. Premary filter 0.18
v. Secondary filter 0.78
vi. VAV box 0.30
vii. Kitchen Hood 0.50
viii. Silencer 0.25
0.230
Safety Factor 15.0% => 0.27
Total Static Pressure (In. wg) => 2.07
(Pa) => 517.2
Eqv. Rnd Duct
Velocity
Static Pressure Loss of Straight Duct =>
Duct Size Throat
BASEMENT 1
SSF-B1-Z3-2 (FM) Rev. 1
Duct Size Air Duct Pres. Loss
1.00 900
1.00 1,600
r/W Turning Angle Radius, R (mm)
L, (in) (0, 30, 45, 60 deg.)
4 6
Static Pressure Loss of Elbow =>
Duct Size Total Damper Damper
Fitting Type Blade Length Angle
1
1
4 6
3 5
Static Pressure Loss of Damper or Wye =>
Vel. (Fpm)
437
349
Static Pressure Loss from Other Ductwork Accessories =>
1
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
YesYes
YesYes
YesYes
YesYes
YesYes
Yes
