cfh, cfm, cfs
cfh, cfm, cfs : Traditional abbreviations for cubic feet per hour, cubic feet per minute, and cubic feet per second, respectively. 1 cfm = 28.3169 liters per minute (L/min) and 1 cfs = 28.3169 liters per second (L/s). Symbols with a slash, such asCf/h, are also seen