507.5 Capacity of Hoods
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.
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.
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.
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.
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.