2.10.2 OCCUPIED AREAS
2.10.2.1 Gymnasiums
2.10.2.2 Motor Maintenance/Storage Facilities
2.10.2.3 Warehouses
2.10.2.4 SYSTEM CHARACTERISTICS:
(a) The minimum air flow shall be based on 8 air changes per hour. Refer
Article 1.3 for the indoor design conditions.
(b) The supply air system shall be comprised of a fan, filters, heating coil,
dampers, ductwork and outlets, etc.
(c) The system shall operate continuously during occupied hours.
(d) The system shall be recirculatory type, except for the Maintenance
Storage Facility, with 20 percent of the supply air as minimum outdoor air.
However, it shall have the capability of admitting 100 percent outdoor air.
The return and exhaust air systems shall be designed to match these air
flows.
(e) The ventilation and heating shall be thermostatically controlled. The
night set back temperature of 10 degrees C (50 degrees F) shall be maintained
by cycling the ventilation unit (no outdoor air, 100 percent
recirculation).
(f) The motor maintenance storage facility shall be 100 percent exhaust of
the supply air during occupied hours. The exhaust griller shall be located at
150 mm (6 inches) above the floor level.
2.10.3 UNOCCUPIED AREAS
2.10.3.1 Electrical Equipment Rooms (Without Heat Producing Equipment)
2.10.3.2 Mechanical Equipment Rooms
2.10.3.3 Telephone/Signal Rooms
2.10.3.4 SYSTEM CHARACTERISTICS:
(a) The ventilation system shall have thermostatically controlled exhaust
fan(s) and shall run intermittently in response to a rise in the space
temperature above an adjustable set value of 26 degrees C (80 degrees F). The
system shall also be capable of operating manually.
(b) The minimum system capacity shall be as follows:
HVAC DESIGN MANUAL
2-25
HVAC SYSTEMS AND EQUIPMENT
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