water column) static pressure drop). Provide motorized on-off control
dampers between the washer exhaust and the Type A hood. Provide an airflow
control valve to ensure airflow through the hood.
(b) Coordinate utility requirements for the cage washer with PG-18-6,
"Equipment Reference Manual."
3.4 AUDIOLOGY SOUND SUITES
3.4.1 NOISE CRITERIA
Sound level: NC 25
3.4.2 SPECIFIC REQUIREMENTS
(a) Provide a dedicated air terminal unit, (constant volume or variable
air volume) with reheat coil, to serve the examination and control rooms.
Locate the room thermostat in the control room.
(b) Supply at least 2.8 Cu M/Min (100 CFM) in each room. With a variable
air volume system, the reduction in air volume shall be limited to 25
percent of the design airflow.
(c) In the absence of the building HVAC supply air systems, investigate
the possibility of using pre-fabricated, engineered, ventilation system
supplied by the sound suites manufacturers.
3.5 AUDITORIUMS AND THEATERS
3.5.1 GENERAL
(a) Minimum outdoor air requirements based on ASHRAE Standard 62-1999, but
shall not be less than 15 percent of the supply fan air volume.
3.5.2 HVAC REQUIREMENTS
(a) Provide a dedicated, constant volume air-handling unit for auditoriums
and theaters. The air-handling unit shall have an economizer cycle
capability.
(b) Size air outlets/inlets to maintain specified room NC35 level.
(c) Sound attenuators and prefabricated acoustical units shall be used, as
required, to curb duct and equipment noises and maintain predetermined
NC35 level.
(d) Locate return air outlets at 300 mm (12 inch) above finished floor for
proper air circulation.
3.6 BONE MARROW TRANSPLANT (BMT) PATIENT AREAS
3.6.1 GENERAL
(a) Indoor Design Conditions for Patient Areas:
Summer: 24 degrees C (76 degrees F) Db, 50 percent RH
Winter: 25 degrees C (78 degrees F) Db, 30 percent RH
(b) Supply a minimum of 18 air changes per hour for BMT Special Areas,
Patient Rooms, Donor Rooms, Recovery Rooms, and Medical Preparation Rooms.
(c) Maintain positive pressure in the patient areas.
HVAC DESIGN MANUAL
3-3
HVAC REQUIREMENTS FOR OCCUPIED AREAS
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