CFM — Engineering quantity. Influences the result through the governing physical formula; check units. Example: 0.1.
CFM is required
room volume — Engineering quantity. Influences the result through the governing physical formula; check units. Example: 0.1.
room volume is required
Air Change Per Hour — ACH derived from CFM, room volume. Ventilation rate..
Formula
ach = cfm × 60 ÷ roomVolume