530
Cost Base: Description of Hospitals Studied
Air-handling units are either factory assembled or built up on site
depending on size and type of system. General areas, P.M. & R.,
radiology, deep therapy, the cafeteria and the auditorium are supplied with
28 to 58% outside air. All other areas except those with induction units
receive 100% outside air.
Scheduled maintenance of induction units takes 20 minutes per unit,
quarterly, for the cleaning of filters, coils and grills. In the renal area this
occurs weekly.
532.4.3
Memphis, Tennessee, VA Hospital
All areas served by single-duct systems from factory assembled air-
handling units. Exhaust is typically 100%, except for the auditorium, and
nursing areas, general areas and some medical areas, which have wall or
ceiling induction units. Only medical areas have high-pressure systems.
The surgical suite and intensive care unit have individual room reheat and
humidification. Service areas such as the laundry, shops, kitchen and
pool are heated and ventilated, but not cooled.
In the Memphis field station nursing wards, under-window induction units
supply the peripheral bedrooms, and interior areas are supplied by ceiling
induction units. All units receive warm air, and adjust temperature with
chilled water coils.
The two-story psychiatric wards are served by a similar system, with an
exceptionally complicated installation for the corridors, which increases
the unit cost of the HVC in this area, particularly in the quantity of piping.
The 24-bed intensive care unit does not utilize induction units. It is
supplied by a fully ducted system with complex controls. The circular
shape of this ward appears to permit economic centralized distribution.
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