FINAL DRAFT- 10/31/95
REVISED January 1997
Heating, Ventilation and Air Conditioning
In compliance with Executive Order (EO)
Air conditioning systems should be provided to
12699, and EO 12941, all new and existing
heat, cool and ventilate the individual space, as
buildings constructed or leased by the Federal
required to satisfy the VA design criteria. Follow
Government must be seismically safe. The
TB Criteria in the HVAC Design Manual for
EO's require that nationally recognized model
building codes, listed below, be used for the
seismic design and construction of new
The air conditioning systems serving the
buildings, and for the seismic safety assessment
Ambulatory Care Service should be designed to
of existing buildings.
operate at occupied/unoccupied capacity to suit
1994 Uniform Building Code of the
International Congress of Building Officials
The number of people and the air conditioning
load noted on the room design standard sheet is
for the purpose of establishing the design guide
Administrators (BOCA) National Building
basis and its use in planning. The
engineers/designers should verify the actual
number of people and the air conditioning load
1994 Amendments to the Southern Building
to agree with the project requirements. Verify
Code Congress (SBCC) Standard Building
equipment AC loads shown as per actual
equipment furnished on a project.
The percent of outside air should be based on
the space total supply air quantities.
For planning and utilization concerns, casework
systems should be chosen for their flexibility.
Air Quality and Distribution
In general, clean areas shall have positive air
pressure and soiled areas should have negative
components dimensioned for ease of multiple
air flow with respect to the adjoining areas.
re-use installation applications.
Corridors should not be used to supply or to
Casework systems should be planned avoiding
exhaust/return air from rooms. Corridor air may
corner installations and filler panel instances.
be used to ventilate bathrooms, toilet rooms,
hacs, and small electrical or telephone closets
Information Management Systems
Information Management Systems shall include
Exfiltration/infiltration from positive/negative
elements of patient registration, patient charges,
pressure rooms adjacent to a corridor should be
Physician's order entry, and patient/staff
considered in balancing air flow.
The transfer air should not be more than
2.8m3/min (100 CFM) per undercut door.
These systems elements will require access to
the main facility's "information backbone" as well
as the departmental Local Area Network (LAN).
Care should be taken to minimize the short
All components should be planned for
circuiting of air between supply and
return/exhaust openings in rooms.
Headwall Equipment Management Systems
Equipment Management Systems should
A dedicated exhaust system should be provided
facilitate a generic setting for all similar
for all hoods located in the Ambulatory Care
treatment spaces to organize diagnostic
Service. Locate supply air diffusers
equipment support equipment, and supplies.
as far away from the hood sash opening as
possible, and sized to eliminate draft conditions
and for proper air flow at the hood
VA DESIGN GUIDE
AMBULATORY CARE (Hospital Based)