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The US liquid gallon per hour (symbol: GPH) is a the unit of volumetric flow rate equal to that of a US liquid gallon moving each hour. It is equal 1.0515032733333 × 10-6 US gal lqd/h.
The cubic foot per minute (symbol: CFM) is a the unit of volumetric flow rate equal to that of a cubic foot moving each minute. It is equal 0.000471947 m3/s.