340
Heating-Ventilating-Cooling: Organization
343.2.2
Internal Service Bays
As discussed under Section 223.2.2, the overall layout of the hospital
could cause some service bay positions to be entirely internal. This would
mean for the HVC subsystem, either ducting down outside air to the fan
units or removing the fan units to the roof of that stack of service bays.
The latter alternative is considered preferable. It would preserve the ease
of access for replacement of the fan units and allow simpler routine
maintenance on the grouped fans. To preserve the independence of the
service module, each would still be served by its individual unit and
ductwork. This alternative also replaces the original mechanical room with
an area reserved for supply shafts. These could be considerably smaller
in bulk than the mechanical room leaving more floor area free to provide
circulation connections to the functional zones on either side. This
solution will require extra supply ductwork and the larger fan motor
horsepower required for the longer distribution as compared with the
exterior service bay arrangement.
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