20
Chapter Two
cerns, as are simplicity and an acceptable sound level [from 30 to 40
noise criteria (NC)].
2.8.2
Commercial offices
Two basic needs are comfort and an adequate ventilation rate (airflow
in cubic feet per minute per square foot or per person)—so that oc-
cupants will not complain of stuffy or dead air. Where smoking is al-
lowed, the ventilation rate and the amount of outside air must be
increased. The general subject of indoor air quality is discussed in
Chaps. 5 and 21.
Controls are often designed to be nonadjustable by occupants. Zon-
ing must be provided to compensate for use, occupant density, and
exterior exposure. Conference rooms and corner offices should be sep-
arate zones. The ideal HVAC system is flexible enough to allow for
adding or rearranging of zones as use changes. Noise levels should be
stable in a range of 30 to 40 NC.
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