RATE OF EXHAUST FLOW CALCULATIONS (FIG. 2)
Based on the International Mechanical Code (latest edition).
LENGTH
CLEARANCE
HEIGHT
Fig. 2
Canopy size and location
The inside lower edge of canopy-type Type I and II commercial hoods shall overhang or extend a horizontal distance of not less than 6 inches (152 mm) beyond the edge of the top horizontal surface of the appliance on all open sides. The vertical distance between the front lower lip of the hood and such surface shall not exceed 4 feet (1219 mm).
The RATE of air flow required for a vent hood is a minimum of 100 CFM per linear foot of hood length.
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