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MC § 507.5.2
The minimum net airflow for hoods, as determined by Section 507.1, used for heavy-duty cooking appliances shall be determined as follows: Type of HoodCFM per linear foot of hoodBackshelf / pass-over400Double island canopy (per side)400EyebrowNot allowedSingle island canopy600Wall-mounted canopy400 For SI: 1 cfm per linear foot = 1.55 L/s per linear meter.
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