Final Draft 11-30-95
Revised March 1997
Safety Cabinets and Laminar Flow Hoods
Care should be taken to minimize the short
All occurrences of these items will require a
circuiting of air between supply and
confirmation of the materials, chemicals and/or
exhaust/return openings in rooms.
solvents to be used.
Exhaust System
All occurrences of these items will require a
A dedicated exhaust system should be provided
confirmation of the Hood or Cabinet
for the biological safety cabinet located in the
Classification and Type in order to determine
pharmacy. Locate supply air diffusers as far
room
air
and
ventilation
performance
away from the hood sash opening as possible,
requirements.
and size to eliminate draft conditions and for
proper air flow at the hood.
Heating, Ventilation and Air Conditioning
Operation
Seismic
Air conditioning systems should be provided to
Where required, install HVAC systems with
heat, cool and ventilate the individual space, as
seismic provisions as outlined in the VA HVAC
required by VA design criteria.
Design Manual for Hospital Projects.
The air conditioning systems serving the
Refer to VA Handbook H-18-03, CD-54, "Natural
Pharmacy Service should be designed to
Disaster Resistive Design Non-Structural" for
operate at full capacity to suite Pharmacy
additional information.
schedule.
Noise Level
Capacities
Select HVAC equipment, ductwork and air
The number of people and the air conditioning
distribution devices to acheive noise levels listed
load noted on the room design standard sheet is
in the HVAC Design Manual for Hospital
for purpose of establishing the basis of design
Projects and Master Construction Specification
guide and its use in planning. The
Section 15200.
engineers/designers shall verify the actual
Plumbing
number of people and the air conditioning load
Water and Waste Systems
to agree with the project requirements.
The plumbing systems should be provided to
Verify equipment A.C. loads shown as per
satisfy the departmental plumbing needs.
actual equipment furnished on a project.
The department domestic cold water should be
The percent of outside air shall be based on the
piped to all plumbing fixtures and equipment
space total supply air quantities.
requiring this utility.
Air Quality and Distribution
The department domestic hot water should be
In general, clean areas shall have positive air
piped to all plumbing fixtures and equipment
pressure and soiled areas should have negative
requiring this utility. A hot water return system
air flow with respect to the adjoining areas.
should be provided to ensure the design
temperature at the farthest outlet.
Corridors should not be used to supply or
exhaust/return air from rooms. Corridor air may
The department plumbing fixtures and drains
be used to ventilate toilet rooms, hacs and small
should be drained by gravity through soil, waste
electrical or telephone closets opening directly
and vent stacks. In addition, the department
on
corridors.
Exfiltration/Infiltration
from
special waste should be drained through
positive/negative pressure rooms adjacent to a
corrosion resistance flame retardant piping into
corridor should be considered in balancing air
either a local or centralized acid dilution tank.
flow.
The transfer air, should not be more than
2.8 m3/min. (100 CFM) per undercut door.
VA DESIGN GUIDE
PHARMACY SERVICE
PAGE 2-4
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