Extech Instruments 45160 User Manual page 4

Useful Equations
Area equations
Cubic equations
CMM (m
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A = W x H
3
CFM (ft /min) = Air Velocity (ft/min) x Area (ft
3
/min) = Air Velocity (m/sec) x Area (m
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H
W
A = pi x R
R
2
2
)
2
) x 60