8.1 Kitchen system exhausts directly outdoors and has a continuous rate ≥ 5 ACH based on kitchen volume (Recommended ≤ 1 sone) or an intermittent rate ≥ 100 CFM and if not integrated with range, also ≥ 5 ACH based on kitchen volume (Recommended ≤ 3 sones)
The following Solution Center guides provide specific guidance about intermittent and continuous kitchen fans:
Guide describing how to install efficient kitchen exhaust systems.
Guide describing how to choose ENERGY STAR fans.
Guide describing how to select low-sone supply and exhaust fans for quiet, continuous operation.