MIL-HDBK-1003/3
the heat exchangers, and replace the fan bearings? Consider
providing space for access, and lighting for maintenance, access
doors, walkways, and catwalks.
9.2.3
Blocked Access. Is a critical access blocked, or is an
annoying delay created when doing needed work on HVAC? Does the
oil delivery truck block the main entrance? Can the fire pumper
truck get to the Siamese connection? Must salt bags for the
water softener be trucked through the lobby or a main corridor?
Design for ease of maintenance.
9.2.4
Emission of Odors. A common source of odor is a
kitchen range hood from a side wall outlet. Consider the geometry
of the site and adjacent buildings, both existing and proposed,
for planning intakes and exhaust points. Review 10 year base map
plan for future building locations. Sometimes the kitchen
exhaust can be run up a shaft and exhausted above the roof.
Another helpful way to minimize the problem is to use a washdown
kitchen hood to reduce the odor.
Another source of odor is the pathological waste
incinerator at a hospital. Even the newer types of incinerators
with after burners create problems when burning tissue. One
solution is to transport the pathological waste to a remote
incinerator site for burning.
Use this philosophy when planning laboratory exhaust
and outside air building intakes. Try point source containment
or neutralization of noxious exhausts at the hoods or exhaust
points or put stacks on the exhaust ducts.
9.2.5
Cooling Tower Vibration. Use care when locating
cooling towers on roofs of light steel frame buildings to avoid
always a solution to this problem. Analytical tools are
available to help solve vibration problems. A vibration engineer
can be retained to study vibration problems and provide
solutions. This kind of equipment could be installed on the
basement floor slab or located elsewhere. Another possible
solution is to change the equipment vibration frequency by
providing a concrete pad under the machine to eliminate its
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