Final Draft 12-31-95
Revised May 1997
Technical Considerations
Narrative
Air Quality and Distribution
Seismic
In general, clean areas shall have positive air
Where required, install HVAC systems with
pressure and soiled areas should have
seismic provisions as outlined in the VA
negative air flow with respect to the adjoining
HVAC Design Manual for Hospital Projects.
areas.
Refer to VA Handbook H-18-03 (CD-54),
Corridors should not be used to supply or to
"Natural Disaster Resistive Design Non-
exhaust/return air from rooms. Corridor air
Structural" for additional information.
may be used to ventilate toilet rooms ,HACS
and small electrical or telephone closets
Noise Level
opening directly on corridors. Exfiltration or
Select HVAC equipment, ductwork, and air
Infilteration from positive or negative pressure
distribution devices to achieve noise levels
rooms adjacent to a corridor
should be
listed in the HVAC Design Manual for Hospital
considered in balancing air flow..
Projects
and
Master
Construction
Specification Section 15200.
Where there are four (4) or more chest rooms
a minimum of one (1) must be designed to
Plumbing
meet the current TB requirements for
ventilation. See HVAC Design Manual for
Water and Waste Systems
Hospital Projects.
The plumbing systems should be provided to
satisfy the departmental plumbing needs.
The transfer air should be no more than
2.83m3/min.(100 CFM) per undercut door.
The department domestic cold water should
be piped to all plumbing fixtures and
Care should be taken to minimize the short
equipment requiring this utility.
circuiting of air between supply and
return/exhaust openings in interior spaces.
The department domestic hot water should be
piped to all plumbing fixtures and equipment
See TB criteria requirements in HVAC Design
requiring this utility.
A hot water return
Manual for Hospital Projects for hood exhaust
system should be provided to ensure the
requirements.
design temperature at the farthest outlet.
Exhaust System
The department plumbing fixtures and drains
Provide a dedicated exhaust system for
should be drained by gravity through soil,
hoods located in the Radiology Service.
waste and vent stacks.
In addition, the
Locate supply diffusers as far away from the
department special waste should be drained
hood sash opening as possible. See HVAC
through corrosion resistance flame retardant
Design Manual for Hospital Projects for hood
piping into either a local or centralized acid
exhaust requirements.
dilution tank.
Medical Gas Systems
The department medical gases outlets are
shown to establish the basis of design guide
and
its
use
in
planning.
The
engineers/designers shall verify the medical
gases location and quantities for individual
projects.
VA DESIGN GUIDE
RADIOLOGY SERVICE
PAGE 2 -8
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