3.20.6 ETO EXHAUST SYSTEM
3.20.6.1 GENERAL: A dedicated exhaust system shall be provided to exhaust
the following area:
(a) ETO Sterilizer Door Area
(b) ETO Aerator
(c) Mechanical Space Housing ETO Sterilizer(s)
(d) Storage Space Housing ETO Cylinders
(e) ETO Sterilizer Vacuum Pump Discharge Floor Drain
(f) ET0 Relief Valve Discharge Pipe
(g) Mechanical Chase housing ETO Cylinders
negative pressure in the areas housing ETO equipment even when the supply
air unit shuts down during unoccupied hours.
3.20.6.3 SPECIFIC DESIGN FEATURES:
(a) The discharge air from the exhaust fan shall be released at the
highest point above the building and care shall be taken to ensure that
the discharge air does not short circuit and find its way into the intake
of any air handling unit.
(b) The specific exhaust air intake locations listed in paragraph 3.20.6.1
above have unique, but widely differing requirements of the static
pressure drops at the inlet. Coordinate this information with the
equipment manufacturer and provide air flow control valves in branch
ducts, as required, to balance the system.
(c) Provide an airflow measuring device in the main exhaust duct, on the
intake side of the exhaust fan at an accessible location. Provide a local
alarm in the event the airflow monitored at the measuring device drops by
15 percent or if the fan stops completely. If the scope of work includes a
central DDC/ECC system, the capabilities shall be provided to monitor the
exhaust system, together with remote start-stop and alarms by providing
appropriate Analog and Binary signals.
(d) Do not provide any heat recovery device in the ETO exhaust system.
(e) The exhaust ductwork shall be continuously welded.
3.20.7 SPECIAL SPD EXHAUST SYSTEM
Provide dedicated exhaust systems for cart and cage washers to handle
saturated wet exhaust air. The ductwork and fan shall be constructed from
corrosion resistant materials. Provide alternate motorized exhaust air
connections to direct air to the general exhaust system when the washers
and their respective exhaust systems are not in operation.
HVAC DESIGN MANUAL
3-22
HVAC REQUIREMENTS FOR OCCUPIED AREAS
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