Confirm makeup air quantity and electrical interlock requirements for a commercial kitchen exhaust system

Steps

1. Confirm makeup air is supplied whenever the kitchen exhaust system operates, per IMC Section 508, in an amount approximately equal to the exhaust airflow
2. Where makeup air is supplied mechanically, confirm it is electrically interlocked with the exhaust fan so makeup air runs whenever the exhaust system runs
3. Check that makeup air delivery does not reduce the exhaust hood's capture effectiveness (e.g., avoid short-circuiting supply air directly into the hood face at high velocity)
4. For solid-fuel cooking operations specifically, confirm NFPA 96 requires the makeup air system be interlocked and powered to prevent negative pressure while the solid-fuel appliance is operating
5. Verify replacement air volume keeps the kitchen from developing negative pressure beyond the small threshold specified in NFPA 96 (approximately 0.02 in. water column), and check for local IMC amendments