
Chapter 2: Prerequisites
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Proper blower selection can be determined from these exhaust requirements and
the total system static pressure loss. Contact Labconco Customer Service for
assistance in sizing a blower system. Refer to Appendix H: VAV Open Area
Guidelines to properly assess the fume hood area opening, allowing the variable
Projected Airflows and Static Pressure
Eco Energy Saving Air Foil Flush Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @ Airflow Volumetric Rate (CFM) @
Sash at Sash at 62.5% Static Pressure (inches of water) Static Pressure (inches of water)
Full open open 4' 5' 6' 8' 4' 5' 6' 8'
at 28" at 18" Hood Hood Hood Hood Hood Hood Hood Hood
XL 100 160 725, 0.27" 955, 0.34" 1180, 0.46" 1640, 0.31" 760, 0.28" 1000, 0.36" 1235, 0.49" 1715, 0.33"
80 128 580, 0.17" 765, 0.22" 945, 0.29" 1310, 0.20" 605, 0.18" 800, 0.23" 990, 0.31" 1370, 0.21"
60 96 435, 0.10" 575, 0.12" 710, 0.17" 985, 0.11" 455, 0.10" 600, 0.13" 745, 0.18" 1030, 0.12"
50 80 365, 0.07" 480, 0.09" 590, 0.11" 820, 0.08" 380, 0.07" 500, 0.09" 620, 0.12" 860, 0.08"
40 64 290, 0.04" 380, 0.05" 470, 0.07" 655, 0.05" 305, 0.05" 400, 0.06" 495, 0.08" 685, 0.05"
Eco Energy Saving Air Foil Flush Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @ Airflow Volumetric Rate (CFM) @
Sash at Sash at Static Pressure (inches of water) Static Pressure (inches of water)
62.50% Full open 4' 5' 6' 8' 4' 5' 6' 8'
open at 18" at 28" Hood Hood Hood Hood Hood Hood Hood Hood
XL 100 62 450, 0.11" 595, 0.13" 735, 0.18" 1025, 0.12" 485, 0.11" 640, 0.14" 790, 0.19" 1100, 0.13"
80 50 365, 0.07" 480, 0.09" 590, 0.11" 820, 0.08" 390, 0.07" 515, 0.08" 635, 0.11" 880, 0.08"
60 38 270, 0.04" 360, 0.05" 440, 0.07" 615, 0.04" 290, 0.04" 385, 0.05" 475, 0.07" 660, 0.05"
Projected Airflows and Static Pressure
Eco Energy Saving Air Foil Flush Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @ Airflow Volumetric Rate (CFM) @
Sash at Sash at 62.5% Static Pressure (inches of water) Static Pressure (inches of water)
Full open open 4' 5' 6' 8' 4' 5' 6' 8'
at 28" at 18" Hood Hood Hood Hood Hood Hood Hood Hood
XL 100 160 705, 0.25" 930, 0.32" 1150, 0.44" 1600, 0.30" 740, 0.26" 975, 0.34" 1205, 0.47" 1675, 0.32"
W/Bypass 80 128 565, 0.16" 745, 0.21" 920, 0.28" 1280, 0.19" 590, 0.17" 780, 0.22" 965, 0.30" 1340, 0.21"
Block 60 96 425, 0.09" 560, 0.12" 690, 0.16" 960, 0.11" 445, 0.09" 585, 0.12" 725, 0.17" 1005, 0.12"
50 80 350, 0.06" 465, 0.08" 575, 0.11" 800, 0.08" 370, 0.07" 490, 0.09" 605, 0.12" 840, 0.08"
40 64 280, 0.04" 370, 0.05" 460, 0.07" 640, 0.05" 295, 0.04" 390, 0.05" 480, 0.08" 670, 0.05"
Eco Energy Saving Air Foil Flush Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @ Airflow Volumetric Rate (CFM) @
Sash at Sash at Static Pressure (inches of water) Static Pressure (inches of water)
62.50% Full open 4' 5' 6' 8' 4' 5' 6' 8'
open at 18" at 28" Hood Hood Hood Hood Hood Hood Hood Hood
XL 100 62 440, 0.10" 580, 0.12" 720, 0.17" 1000, 0.12" 475, 0.10" 625, 0.13" 775, 0.18" 1075, 0.12"
W/Bypass 80 50 350, 0.06" 465, 0.08" 575, 0.11" 800, 0.08" 380, 0.07" 500, 0.09" 620, 0.12" 860, 0.08"
Block 60 38 265, 0.04" 350, 0.05" 430, 0.06" 600, 0.04" 285, 0.04" 375, 0.05" 465, 0.07" 645, 0.05"
Airflows and Static Pressure
Eco Energy Saving Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @
Sash at Sash at 62.5% Static Pressure (inches of water)
Full open open 10' 12' 16'
at 28" at 18" Hood Hood Hood
XL 100 160 2100, 0.45" 2560, 0.62" 3500, 0.37"
W/Bypass 80 128 1680, 0.28" 2050, 0.39" 2800, 0.23"
Block 60 96 1260, 0.16" 1535, 0.22" 2100, 0.13"
50 80 1050, 0.11" 1280, 0.16" 1750, 0.09"
40 64 840, 0.07" 1025, 0.10" 1400, 0.06"
Eco Energy Saving Air Foil
Hood Type Face Velocity (fpm) Airflow Volumetric Rate (CFM) @
Sash at Sash at Static Pressure (inches of water)
62.50% Full open 10' 12' 16'
open at 18" at 28" Hood Hood Hood
XL 100 62 1300, 0.17" 1585, 0.24" 2170, 0.14"
W/Bypass 80 50 1050, 0.11" 1280, 0.16" 1750, 0.09"
Block 60 38 800, 0.06" 970, 0.09" 1330, 0.05"