CFMot = corrected total outdoor air quantity,
CFMst = total system airflow (i.e., sum of air supplied
to all spaces), and
Y = corrected fraction of outdoor air, or
Y = X/(1 + X - Z)
X = CFMoa/CFMst,
Z = CFMoc/CFMsc,
CFMoa = uncorrected sum of outdoor airflow rates for
spaces on the system,
CFMoc = outdoor air required for critical space, and
CFMsc = supply air to the critical space. The critical
space is that space with the greatest required fraction of
outdoor air in the supply to that space.
VAV system ventilation issues.
Adjusted (normal male/female/child).
Office (seated light work, typing)
Factory (light bench work)
Factory (light machine work)
Lights and Equipment
Q = 3.41 * W * Ful * Fsa
W = total light wattage,
Ful = use factor, and
Fsa = special allowance factor for fluorescent fixtures
or for fixtures that release only part of their heat to the