Canopy-type commercial cooking hoods shall exhaust a minimum quantity of air (Q) determined in accordance with this section and Sections 18-28-507.13.1 through 18-28-507.13.4.
where:
A = The horizontal surface area of the hood, in square feet (m2).
D = Distance in feet (m) between the lower lip of the hood and the cooking surface.
P = That part of the perimeter of the hood that is open, in feet (m).
Q = Quantity of air, in cubic feet per minute (m3/s).