local exhaust ventilation 5
1-Why is high flow velocity (usually 2,000 – 6,000 fpm) in ductwork necessary? 2-When selecting and designing ductwork, why round duct shape is usually better than others (ex. Rectangle, square, oval)? 3-Look at Chart 10 and determine the duct wall roughness correction factors (R) are affected by two factors including ____________________ and _________________. 4-In a […]
