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// CODE SNIPPET

508.5.1 Canopy Size and Location

California Mechanical Code 2019 > 5 Exhaust Systems > 508.0 Type I Hoods > 508.5 Hood Size > 508.5.1 Canopy Size and Location
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For canopy type commercial cooking hoods, the inside edge thereof shall overhang or extend a horizontal distance of not less than 6 inches (152 mm) beyond the edge of the cooking surface on open sides, and the vertical distance between the lip of the hood and the cooking surface shall not exceed 4 feet (1219 mm).

Exception: Listed exhaust hoods are to be installed in accordance with the terms of their listings and the manufacturer's installation instructions.

508.5.1.1 Capacity of Hoods

Canopy-type commercial cooking hoods shall exhaust through the hood with a quantity of air not less than determined by the application in accordance with Section 508.5.1.2 through Section 508.5.1.5. The exhaust quantity shall be the net exhaust from the hood determined in accordance with Equation 508.5.1.1. The duty level for the hood shall be the duty level of the appliance that has the highest (heaviest) duty level of appliances installed underneath the hood.

Exception: Listed exhaust hoods installed in accordance with the manufacturer's installation instructions.


ENET = EHOOD - MAID (Equation 508.5.1.1)

Where:
ENET = net hood exhaust
EHOOD = total hood exhaust
MAID = makeup air, internal discharge

508.5.1.2 Extra-Heavy-Duty Cooking Appliances

The minimum net airflow for hoods used for solid fuel cooking appliances such as charcoal, briquette, and mesquite to provide the heat source for cooking shall be in accordance with Table 508.5.1.2.

TABLE 508.5.1.2
EXTRA-HEAVY-DUTY COOKING APPLIANCE AIRFLOW
TYPE OF HOOD AIRFLOW (cubic foot per minute
per linear foot of hood)
Backshelf/pass-over Not permitted
Double island canopy (per side) 550
Eyebrow Not permitted
Single island canopy 700
Wall-mounted canopy 550
For SI units: 1 cubic foot per minute = 0.00047 m3/s, 1 foot = 304.8 mm

508.5.1.3 Heavy-Duty Cooking Appliances

The minimum net airflow for hoods used for cooking appliances such as gas under-fired broilers, gas chain (conveyor) broilers, electric and gas wok ranges, and electric and gas over-fired (upright) broilers shall be in accordance with Table 508.5.1.3.

TABLE 508.5.1.3
HEAVY-DUTY COOKING APPLIANCE AIRFLOW
TYPE OF HOOD AIRFLOW (cubic foot per minute per
linear foot of hood)
Backshelf/pass-over 400
Double island canopy (per side) 400
Eyebrow Not permitted
Single island canopy 600
Wall-mounted canopy 400
For SI units: 1 cubic foot per minute = 0.00047 m3/s, 1 foot = 304.8 mm

508.5.1.4 Medium-Duty Cooking Appliances

The minimum net airflow for hoods used for cooking appliances such as electric and gas hot-top ranges, gas open-burner ranges (with or without oven), electric and gas flat griddles, electric and gas double-sided griddles, electric and gas fryers (including open deep fat fryers, donut fryers, kettle fryers, and pressure fryers), and electric and gas conveyor pizza ovens shall be in accordance with Table 508.5.1.4.

TABLE 508.5.1.4
MEDIUM-DUTY COOKING APPLIANCE AIRFLOW
TYPE OF HOOD AIRFLOW (cubic foot per minute
per linear foot of hood)
Backshelf/pass-over 300
Double island canopy (per side) 300
Eyebrow 250
Single island canopy 500
Wall-mounted canopy 300
For SI units: 1 cubic foot per minute = 0.00047 m3/s, 1 foot = 304.8 mm

508.5.1.5 Light-Duty Cooking Appliances

The minimum net airflow for hoods used for cooking appliances such as gas and electric ovens (including standard, bake, roasting, revolving, retherm, convection, combination convection/steamer, rotisserie, countertop conveyorized baking/finishing, deck, and pastry), discrete element ranges (with or without oven), electric and gas steam-jacketed kettles less than 20 gallons (76 L), electric and gas pasta cookers, electric and gas compartment steamers (both pressure and atmospheric), electric and gas cheese melters, electric and gas tilting skillets (braising pans) electric and gas rotisseries, and electric and gas salamanders shall be in accordance with Table 508.5.1.5.

TABLE 508.5.1.5
LIGHT-DUTY COOKING APPLIANCE AIRFLOW
TYPE OF HOOD AIRFLOW (cubic foot per minute
per linear foot of hood)
Backshelf/pass-over 250
Double island canopy (per side) 250
Eyebrow 250
Single island canopy 400
Wall-mounted canopy 200
For SI units: 1 cubic foot per minute = 0.00047 m3/s, 1 foot = 304.8 mm

Related Code Sections


508.10.1 Exhaust Systems, Canopy Size and Location
For canopy type commercial cooking hoods, the inside edge thereof shall overhang or extend a horizontal distance of not less than 6 inches (152 mm ...
California Mechanical Code 2016 > 5 Exhaust Systems > 508.0 Hoods > 508.10 Hood Size > 508.10.1 Canopy Size and Location
508.5.1 Exhaust Systems, Canopy Size and Location
For canopy type commercial cooking hoods, the inside edge thereof shall overhang or extend a horizontal distance of not less than 6 inches (152 mm ...
California Mechanical Code 2019 > 5 Exhaust Systems > 508.0 Type I Hoods > 508.5 Hood Size > 508.5.1 Canopy Size and Location
508.10.1.6 Exhaust Systems, Dishwashing Appliances
The net airflow for Type II hoods used for dish washing equipment shall be not less than 200 cubic feet per minute (0.094 m 3 /s) per linear foot (m ...
California Mechanical Code 2016 > 5 Exhaust Systems > 508.0 Hoods > 508.10 Hood Size > 508.10.1 Canopy Size and Location > 508.10.1.6 Dishwashing Appliances
508.5.1.2 Exhaust Systems, Extra-Heavy-Duty Cooking Appliances
island canopy (per side) 550 Eyebrow Not permitted Single island canopy 700 Wall-mounted ...
California Mechanical Code 2019 > 5 Exhaust Systems > 508.0 Type I Hoods > 508.5 Hood Size > 508.5.1 Canopy Size and Location > 508.5.1.2 Extra-Heavy-Duty Cooking Appliances
508.5.1.3 Exhaust Systems, Heavy-Duty Cooking Appliances
-over 400 Double island canopy (per side) 400 Eyebrow Not permitted Single island canopy ...
California Mechanical Code 2019 > 5 Exhaust Systems > 508.0 Type I Hoods > 508.5 Hood Size > 508.5.1 Canopy Size and Location > 508.5.1.3 Heavy-Duty Cooking Appliances
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