typical bypass factor for HVAC cooling
The bypass factor of .384 means that 38.4% of the air moving over the coil. is unaffected by the coil. Typical bypass factors for normally opera ting coils vary from .1 to .35, or. from 10% to 35%.oving to the left on the chart indicates a reduction in temperature as well as an increase in relative humidity. Also notice that the state point on the right is higher on the chart than that on the left. As this air was cooled it moved to the left but, it also dropped to a lower specific humidity (grains) line.