Standard Cubic Feet per Minute (SCFM) is a volumetric flow-rate corrected to a set of "standardized" conditions of pressure, temperature, and sometimes relative humidity.
Standard Cubic Feet per Minute (SCFM) is a volumetric flow-rate corrected to standard-density conditions. SCFM is volumetric flow-rate at a "standardized" pressure, temperature, and relative humidity.