340
Heating Ventilating Cooling
341
BASIC DESIGN
The HVC subsystem design is based on ducted air systems, with each fan
unit zoned to supply one service module within the hospital. The fan unit
will be placed in the service bay and the ductwork will pass horizontally
through the service zone to provide downfeed service via ceiling registers
to the functional zone below. (See Figure 340-1.)
Within the limits of specific functional requirements, the generic design
option chosen for the HVC subsystem should be the same throughout the
hospital. This is desirable for straightforward construction scheduling,
simple maintenance organization and optimized adaptability. To achieve
this adaptability, the chosen option must be capable of satisfying all of the
HVC demand increases or changes projected for the hospital.
Main vertical and horizontal distribution components are considered
permanent. The potential difficulty of altering or replacing these large
ducts means that they must be sized initially to handle the assumed future
maximum air volume for the service modules. Branch distribution
components, terminals, controls, air-handling units and other service bay
equipment are considered adaptable.
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