MIL-HDBK-1191
8.2.8
Mechanical Equipment Rooms. In general, mechanical equipment
rooms shall be designed with ventilating systems which will maintain
temperatures within 5.5C of summer ambient design temperature. However
when these equipment rooms house temperature-sensitive electronic
components, such as microprocessor based controls, electronic circuit
breakers, etc., designers shall confirm the ambient requirements of such
equipment and design accordingly.
8.3
Refrigerants. Refrigeration equipment shall utilize
refrigerant having an Ozone Depletion Potential (ODP) of not greater than
0.05. Refrigeration room design shall include the safety features, such as
sensing devices, purge ventilation system, etc., as required for the
particular refrigerant in accordance with ASHRAE Standards 15 and 34
(references 8j and 8k).
8.4
Life-Cycle-Cost/Energy Analysis. HVAC equipment selection
shall include life-cycle cost analysis of the available equipment or system
alternatives meeting the medical functional requirements, in accordance
with guidance given in Section 7.
8.5
Eligibility for Air Conditioning.
8.5.1
Total Air Conditioning. Air conditioning is required in all
normally-occupied facilities and spaces in which the interior conditions
listed in Appendix A cannot be met through natural ventilation alone.
"Normally occupied spaces" will include such spaces incidental to medical
facilities as corridors and circulation areas. Normally unoccupied, or
intermittently occupied, spaces such as restrooms, locker rooms, soiled
linen rooms, janitors closets, and similar spaces accessible to medical
staff or the public and having exterior exposure shall be air conditioned
(in addition to being provided with the required ventilation) to maintain
reasonable conditions.
8.5.2
Food Service Area. Air conditioning of the kitchen areas shall
be designed to avoid the waste of energy. Designs shall consider utilizing
dining room transfer air or tempered make-up air for vented equipment
exhaust, spot cooling, exhaust system heat recovery, and other energy
saving strategies to minimize energy costs while providing a reasonably
comfortable environment for kitchen staff.
8.5.3
Not Authorized Air Conditioning. The following areas shall not
be provided with air conditioning. Heating and/or ventilation shall be
provided as required to meet criteria.
a)
Motor Vehicle Storage Areas
b)
Energy (Boiler/Chiller) Plants
c) Mechanical Equipment Rooms, unless containing sensitive
electronic equipment requiring temperature control.
d) Toilets/Showers and Locker Rooms not located with outside
exposure. Note that locker rooms which do not include a shower room or
toilet may be recirculated.
8-3
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