06-06
HVAC DESIGN MANUAL
FOR VETERINARY MEDICAL UNIT PROJECTS
DEPARTMENT OF VETERANS AFFAIRS
1. CRITERIA UNIQUE TO VA
1.1 GENERAL
In this section requirements unique to the VA are described.
Compliance to everything in this design manual is mandatory.
1.2 DRAWINGS
The following information shall be shown on "MH" drawings.
A. HVAC system design including indoor steam piping.
See Article 2.0
for additional information.
B. Seismic design related to the HVAC systems.
C. Outdoor exposed (or, underground) chilled water piping.
1.3 VA GRAPHIC STANDARDS
The HVAC system design documentation shall use the VA standard
symbols, abbreviations, standard details, and equipment schedules.
1.4 CLIMATIC CONDITIONS
The outdoor climatic conditions shall be based on the requirements
outlined in section 2.0 and information provided in the attached
climatic data for the VA facilities. These conditions are based on
the weather data listed in the ASHRAE Handbook of Fundamentals for the
weather stations which are located at or near the VA medical centers.
The local professional engineers may recommend more severe outdoor
climatic conditions, commonly used by them, for review and approval by
the VA.
1.5 DUCTWORK/PIPING
In the final design drawings (Construction Documents Phase) all
ductwork, regardless of sizes and/or complexity of layout(s), and
piping 152 mm (6") and above shall be shown in double line with all
fittings and accessories clearly shown and identified.
1.6 ENGINEERING ECONOMIC ANALYSIS
To comply with Public Law 95-619, engineering economic analysis shall
be performed, in accordance with the procedure outlined by the
Department of Energy (DOE) in NBS Handbook 135 (Life Cycle Cost
Federal Energy Management Program), to select the most cost effective
HVAC system for the application. The additional features of the
analysis are:
A. For comparison of systems, a 20 year life cycle shall be assumed.
B. The analysis may be performed by means of available public domain
programs, such as, "TRACE", "E-CUBE", and CARRIER E20-II, etc.
C. For specific VA requirements relative to the system configuration and
limitations, see Sections 3.0.
D. Other relevant features are: 7% discount factor for future cost and
no taxes or insurance in computing annual owning cost.
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