3.16.2.2 Supply Air
(a) Special: 12 air changes per hour minimum
(b) General: 6 air changes per hour minimum
(c) Provide more air changes/hour if required, to meet the space sensible
cooling load demand.
3.16.2.3 Exhaust/Recirculation
(a) Special: 100 percent exhaust of the supply air.
(b) General: Recirculation of room air is permitted provided the air
handling unit design permits recirculation of room air during mild
weather.
(a) Special: Negative air pressure. (Exhaust/Return air = Supply air + 15
percent)
(b) General: Zero air pressure (Supply and return air volumes shall be the
same).
3.16.2.5 Room Temperature Control
(a) Special: Individual room temperature control is required.
(b) General: Individual room temperature control is not required.
3.16.3 CORE AREAS
See Table 3-2
3.16.4 EXPANDED CORE AREAS
See Table 3-3
3.16.5 HVAC SYSTEM
3.16.5.1 A dedicated, all air, constant volume air handling unit shall be
provided to service the MMS. The air-handling unit shall have the
following features.
(a) Double wall construction.
(b) Horizontal (or vertical), draw thru, single zone configuration. Blow
thru configuration will not be acceptable.
(c) 30 percent ASHRAE Test Efficiency pre-filters and 85 percent ASHRAE
Test Efficiency after-filters. These filters can be located back to back,
on the suction side of the supply air fan, in a common housing.
(d) Energy Efficient Motor.
HVAC DESIGN MANUAL
3-14
HVAC REQUIREMENTS FOR OCCUPIED AREAS
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