FINAL DRAFT 9/6/95
UPDATED NOV. 1996
Narrative
Technical Considerations
Capacities:
Seismic:
The number of people and the air
Where required,install the HVAC system
conditioning load notes on the room's design
with seismic provisions as outlined in the VA
standard sheet establishes the basis of the
HVAC Design Manual for Hospital Projects.
design guide and its use in planning. The
engineers and/or designers should verify the
Refer to VA Handbook H-18-3, CD-54,
actual number of people and the air
"Natural Disasters Resistive Design, Non-
conditioning load to agree with the project
Structural" for additional information.
requirements.
Noise Level:
Similarly, engineers and/or designers
Select HVAC equipment, ductwork,and
should verify equipment AC loads shown or
distribution devices, to achieve noise levels
per actual equipment furnished on a project.
listed in the VA HVAC Design Manual for
The percentage of outside air should be
Hospital Projects.
based on the space's total supply air
quantities.
Plumbing:
Water and Waste Systems:
Air Quality and Distribution:
The plumbing systems should be provided
Corridors should not be used to supply or
to satisfy the departmental plumbing needs.
to exhaust and/or return air from rooms.
Corridor air may be used to ventilate toilet
The department's domestic cold water
rooms, and small electrical or telephone
should be piped to all plumbing fixtures and
closets opening directly on to
corridors.
equipment that require this utility.
Exfiltration / infiltration from positive /
The department domestic hot water
negative pressure rooms adjacent to a
should be piped to all plumbing fixtures and
corridor should be considered in balancing air
equipment that require this utility. A hot water
flow.
return system should be provided to assure
The transferred air area's should not be
the design temperature reaches the furthest
more than 2.8 mm.3 /min (100 CFM) per
outlet.
undercut door.
The department plumbing fixtures and
Care should be taken to minimize the
drains should be drained by gravity through
short- circuiting of air between supply and
soiled waste and vent stacks. In addition, the
return and/or exhaust openings in rooms.
department special waste should be drained
through corrosion resistant flame retardant
Exhaust System:
piping into either a local or a centralized acid
dilution tank.
A dedicated exhaust system should be
provided for all hoods located in Nuclear
Medicine Service. Locate the supply air
Medical Gas Systems:
diffusers as far away from the hood sash
opening as possible; and size to eliminate
The department's medical gases' outlets
draft conditions and provide proper air flow at
establish the basis of the design guide and its
the hood.
use in planning.
The engineers and/or
designers shall verify the medical gases'
locations and quantities for individual projects.
VA DESIGN GUIDE
NUCLEAR MEDICINE SERVICE
PAGE 2-10
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