International Mechanical Code Section 507.2 is hereby amended to read as follows:

507.2 Type I hoods. Type I hoods shall be installed where cooking appliances produce grease or smoke as a result of the cooking process. Type I hoods shall be installed over medium-duty, heavy-duty and extra-heavy-duty cooking appliances.

Exceptions:

1. A Type 1 hood shall not be required for an electric cooking appliance where an approved testing agency provides documentation that the appliance effluent contains 5 mg/m³ or less of grease when tested at an exhaust flow rate of 500cfm (0.236 m³/s) in accordance with UL 710B.

2. A Type 1 hood shall not be required in an R-2 type occupancy with no more than 16 residents.

3. A Type 1 hood shall not be required in I-2 domestic cooking systems that meet IBC 904.13 requirements.