MIL-HDBK-1191
8.5.4
Medical Warehouses. HVAC design shall be based upon the
environmental requirements of the stored materials. Materials with
critical temperature or humidity requirements should be stored in
separately partitioned areas from materials having less critical
requirements, to avoid the needless expenditure of air conditioning energy,
if such design is cost effective. Spaces within medical warehouses which
will be normally occupied, including Administrative or Break rooms, shall
be air conditioned as required to provide the design conditions listed in
Appendix A. Air conditioning will also be required for any warehouse spaces
housing computer or other environmentally sensitive equipment.
8.6
Mechanical Equipment Space.
8.6.1
Mechanical rooms for major air handling equipment, heat
exchangers, prime movers, medical gas supplies, vacuum/air compressors,
and other major mechanical equipment shall generally be located within the
facilities with access to the outside of the building. Exceptions to locate
equipment in penthouse equipment rooms, may be considered by the Design
Agent if justified from a cost or functionality standpoint and if properly
coordinated with the base/post engineers. Rooftop mounted air handlers
should be avoided due to the difficulty of maintenance access, and
consideration of safety and working conditions for O&M personnel.
Mechanical room location and layout shall consider:
a) Sufficiency of space to enable access for operation,
maintenance, and replacement of equipment.
b) Minimization of distribution runs.
c) Relative location to electrical equipment rooms: NEC
vertical clearance/dedicated space requirements for electrical equipment
will restrict or preclude the routing of piping and ductwork through these
locations.
d) Relative location to communication rooms: adjacency of fan
and communications rooms will create congested above-ceiling conditions
where cable trays and ductwork converge.
e) Adjacency to corridors, as a path for the routing of
ductwork.
f) Adjacency to spaces having stringent noise control
requirements, or spaces with high ceilings which may restrict duct
distribution space.
g) Potential future expansion of mechanical system capacity.
8.6.2
Chilled water and steam/hot water generators may be located in
a separate energy plant. Utility lines connecting the energy plant to the
facility shall be installed in a tunnel or other accessible enclosure
providing maintenance access and protection from the elements.
8.7
HVAC System Design For Functional Areas. For HVAC design, a
medical facility can be considered to contain six general areas including
8-4
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