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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 choose ENERGY STAR fans.

Guide describing how to select low-sone supply and exhaust fans for quiet, continuous operation.