MIL-HDBK-1027/4A
c) Chemical Storage. Ventilation rates are dependent on the type
and quantity of chemicals stored. Provide dilution ventilation for health
and for reducing vapors below the lower explosive limit. See the latest
edition of the Industrial Ventilation manual by the American Conference of
Governmental Industrial Hygienists for calculation procedures. Ventilation
outlets from the Chemical Storage room should be remote from areas used by
personnel, windows, and any ventilation inlets. Unless continuous
ventilation is required for the particular chemicals stored, forced
ventilation equipment should be wired into the light switch.
5.2.6.3
Air Distribution System
a) Minimum Air Requirements. Pool/Training spaces without
spectator areas should have a minimum of 4 to 6 air changes per hour.
Pool/Training spaces with spectator areas should have a minimum of 6 to 8 air
changes per hour. See the ASHRAE Applications Handbook for further guidance.
b) Airflow Path. Air distribution system should be designed to
minimize air motion or drafts in the pool area. When spectator areas are
included, those areas should have separate supply air. Do not return or
exhaust air from the pool through spectator areas. Upward perimeter air
distribution along pool windows/walls minimizes downdraft and condensation
buildup. Return and exhaust outlets should be from the highest practical
point, due to the water vapor's tendency to rise.
c) Materials. Ducts and air devices located in pool areas and
chemical storage rooms should be of corrosion-resistant materials. Aluminum
and galvanized steel with a high-performance epoxy paint are effective
products in the pool area's highly corrosive environment.
5.2.6.4
Zoning. The pool enclosure should be on separate HVAC systems from
the systems provided for other areas due to the pool's dissimilar
environmental conditions and potentially different operating schedule.
5.2.6.5
Specialties. All components of HVAC systems exposed to the humid,
corrosive air of the pool or corrosive chemicals/vapors should be corrosion-
resistant.
a) Pool/Training. Provide mechanical dehumidifiers with energy
recycling features to control humidity. Evaluate the economies in providing
dehumidifier controls and features which will allow the energy recovered to
be used to heat pool water, in addition to reheating pool air. It is likely
that supplemental heat, in addition to the heat recovered during the
dehumidification process, will be required to maintain pool water temperature
and pool enclosure air temperature under winter design conditions. Also,
evaluate the merits of providing remote condensers with the dehumidifiers to
allow the equipment to function as an air conditioner during warm-humid
months.
b) Equipment Drying and Storage. Provide dehumidification
capabilities integral with HVAC system serving the drying area or as a
separate system.
5.2.6.6
HVAC Controls
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