distribution of airflow over the filter surface. See Article 2.3 for
access sections requirements.
3.21.7 AIR DISTRIBUTION
The supply air duct on the downstream side of the after-filters shall be
stainless steel with airtight access panels at each elbow and at 6 m (20
feet) interval on straight duct runs for cleaning and inspection. The air
distribution for each O.R. shall have stainless steel multiple slot panel
diffusers positioned around the operating tables to discharge 70% supply
air in a vertical air stream inclined at a 15 degrees outward angle. The
remaining 30 percent supply air shall be delivered downward over operating
area using perforated face outlets. Provide a minimum of two exhaust
registers in each O.R., located diagonally opposite seven inches above the
finished floor. The exhaust air quantity shall be at least 15 percent less
than the supply air to maintain positive pressure between the O.R. and the
adjoining areas.
3.21.8 MISCELLANEOUS
3.21.8.1 The individual humidity for each O.R. shall be maintained by a
terminal humidifier on the downstream side of the dedicated constant
volume reheat air terminal unit serving the space.
3.21.8.2 Each O.R. shall be furnished with temperature and humidity
recorders to keep a continuous record. In lieu of the chart records,
temperature and humidity sensors can be used to record data at the
Engineering Control Center.
3.21.8.3 See Article 2.12 for the dedicated chilled water system for the
Surgery Suites and Article 2.16 for the emergency power requirements.
3.21.8.4 See Article 2.3.4 for restrictions on lining of Terminal Units
for the Operating Rooms.
3.22 TB CRITERIA
(FOR SUSPECTED OR KNOWN INFECTIOUS TB (S/KI TB) PATIENT ROOMS AND RELATED
AREAS AND CLINICAL MYCOBACTERIAL LABORATORIES).
3.22.1 GENERAL
(a) The health care authorities at the
medical center and/or the health
care planners shall be responsible for
classifying the specific medical
center as a high or low incidence area
and shall be responsible for
determining the location, and quantity
of specialized rooms which would be
established for S/KI TB patients.
(b) The health care authorities at the medical center and/or the health
care planners and Pathology shall be responsible for identifying BSL3
Clinical Mycobacterial Laboratories requiring special architectural and
engineering controls in accordance with BSL3 biosafety guidelines
recommended by Center for Disease Control (CDC) and National Institutes of
Health (NIH).
HVAC DESIGN MANUAL
3-24
HVAC REQUIREMENTS FOR OCCUPIED AREAS
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