At a minimum, how many CFM should each kitchen's demand-controlled exhaust fan operate at?

In the context of building performance and ventilation standards, the minimum requirement for the operation of demand-controlled exhaust fans in kitchens is set to ensure adequate air quality and safety. The value of 100 CFM is established as a baseline to effectively remove cooking contaminants, odors, and excess moisture from the kitchen environment.

When exhaust fans operate at this minimum airflow rate, they help maintain a healthy indoor atmosphere by efficiently dissipating pollutants generated during cooking activities. This level is considered sufficient to facilitate proper air exchange without causing excessive energy consumption.

Choosing a lower airflow rate could potentially compromise indoor air quality, as it may not adequately address the specific demands that arise from cooking, especially in terms of managing smoke and fumes. Conversely, higher rates may lead to increased energy use, making the balance at 100 CFM a practical and energy-efficient choice. Therefore, abiding by this 100 CFM guideline helps ensure both effective ventilation and sustainability in kitchen environments.