MIL-HDBK-1191
guidelines,
with a slot velocity of 10.2 m/s (2,000 ft/min).
8.16.8
Portable Bench-Top Hoods. Portable hoods with glass viewing
panels and interior lighting may be used to control chemical contaminants
of minor toxicity and odors. They shall be attached to built-in exhaust
outlets with flexible ducts. Each built-in exhaust system outlet shall
provide a minimum of 0.0755 m3/s (160 cfm) or a face velocity of 0.38 m/s
(75 ft/min) at the hood, whichever provides the maximum mass flow of air.
The exhaust duct opening shall be provided with a blast gate and sealing
plug to stop air flow when the unit is not in service.
8.16.9
Waste Anesthesia Gas Exhaust (WAGE). In each space utilized
routinely for the administration of inhalation anesthesia or analgesic
agents, a Waste Anesthesia Gas Exhaust (WAGE) disposal system for removal
of waste anesthetizing gases shall be provided, designed in accordance with
NFPA 99. Coordinate required system vacuum pressure and terminal fittings
with using Military Department Anesthesiology and Oral Surgery Departments
on an individual project basis.
8.16.10
Medical Equipment. See Section 16 of this military handbook
for special ventilation requirements of medical equipment.
8.16.11
Ethylene Oxide. Sterilizers, aerators, manifold rooms, and
disposal systems shall be directly exhausted to the outside by a dedicated
exhaust system. ETO storage and supply systems and ventilation design
shall be in accordance with 29 CFR 1910.1047, Section 16 of this manual,
and the latest industry guidance. Ventilation provisions currently include
such features as exhaust inlets above and below sterilizer door, waste
water discharge, and floor drain. Ventilation of bottle storage rooms is
also required. An audible and visual alarm shall be provided to warn of
loss of airflow in the exhaust system. Increasingly, local and state
regulations prohibit or limit the discharge of ETO to the environment.
These shall be considered applicable to DOD medical facilities, and in such
cases the design shall utilize ETO "scrubbers" or other approved
technologies to prevent or reduce ETO emissions as required.
8.16.12
Kitchen Hoods. Exhaust hoods in the kitchen area are to be the
type utilizing 80 percent unconditioned air and having an exhaust rate of
not less than 0.0022 m3/s per square meter (50 cfm per square foot) of face
area. Face area is defined for this purpose as the open area from the
exposed perimeter of the hood to the average perimeter of the cooking
surface.
If economically justified, hood makeup air should consist of up
to 80% outside air tempered, through heat recovery equipment, by the
exhaust. Equip all hoods over the cooking service equipment with fire
extinguishment systems, automatic washdown and grease extractors, and
heat-actuated fan controls. Cleanout openings, and required fire
protective enclosures and separations, shall be provided in horizontal
exhaust duct systems serving these hoods grease hood exhaust ducts in
accordance with NFPA 96.
8.17
Patient Isolation Room Design. Isolation rooms consist of
Disease Isolation and Protective Isolation rooms. The former is intended
for the patient suffering from a known or suspected infectious disease, and
is provided with engineering controls which assist in preventing the spread
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