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// CODE SNIPPET

507.5 Capacity of Hoods

Mechanical Code 2015 of Utah > 5 Exhaust Systems > 507 Commercial Kitchen Hoods > 507.5 Capacity of Hoods
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Commercial food service hoods shall exhaust a minimum net quantity of air determined in accordance with this section and Sections 507.5.1 through 507.5.5. The net quantity of exhaust air shall be calculated by subtracting any airflow supplied directly to a hood cavity from the total exhaust flow rate of a hood. Where any combination of heavy-duty, medium-duty and light-duty cooking appliances are utilized under a single hood, the exhaust rate required by this section for the heaviest duty appliance covered by the hood shall be used for the entire hood.

507.5.1 Extra-Heavy-Duty Cooking Appliances

The minimum net airflow for hoods, as determined by Section 507.1, used for extra-heavy-duty cooking appliances shall be determined as follows:

Type of Hood CFM per linear foot of hood
Backshelf/pass-over Not allowed
Double island canopy
(per side)
550
Eyebrow Not allowed
Single island canopy 700
Wall-mounted canopy 550

For SI: 1 cfm per linear foot = 1.55 L/s per linear meter.

507.5.2 Heavy-Duty Cooking Appliances

The minimum net airflow for hoods, as determined by Section 507.1, used for heavy-duty cooking appliances shall be determined as follows:

Type of Hood CFM per linear foot of hood
Backshelf/pass-over 400
Double island canopy
(per side)
400
Eyebrow Not allowed
Single island canopy 600
Wall-mounted canopy 400

For SI: 1 cfm per linear foot = 1.55 L/s per linear meter.

507.5.3 Medium-Duty Cooking Appliances

The minimum net airflow for hoods, as determined by Section 507.1, used for medium-duty cooking appliances shall be determined as follows:

Type of Hood CFM 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: 1 cfm per linear foot = 1.55 L/s per linear meter.

507.5.4 Light-Duty Cooking Appliances

The minimum net airflow for hoods, as determined by Section 507.1, used for light-duty cooking appliances and food service preparation shall be determined as follows:

Type of Hood CFM 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: 1 cfm per linear foot = 1.55 L/s per linear meter.

507.5.5 Dishwashing Appliances

The minimum net airflow for Type II hoods used for dishwashing appliances shall be 100 cfm per linear foot (155 L/s per linear meter) of hood length.

Exception: Dishwashing appliances and equipment installed in accordance with Section 507.3.
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