[OSHPD 1, 2, 3 & 4]
The ETO sterilization equipment room shall be provided with minimum air changes per hour per Table 4-A and be maintained at a negative air balance.
All air from the ETO sterilizer equipment room shall be exhausted to the outside by a dedicated system or other approved method.
The exhaust fan for the dedicated system shall be located at the discharge point of the system and identified as ETO Equipment Room Exhaust.
The discharge point shall be a minimum of 25 feet (7620 mm) away from any outside intake, operable window or personnel passage.
The aeration units shall be ventilated through a nonrecirculating dedicated ventilation exhaust system.
When the drain is not located in the ETO sterilizer equipment room, ventilation is required by a capture box.
When not located in the ETO sterilizer equipment room, exhaust during cylinder change is required by installing a hood that is part of a dedicated ventilation exhaust system, positioned no more than 1 foot (305 mm) above or behind the point where the change of cylinders takes place.
The ventilation of sterilizer relief valve is required through a pipe connected to the outlet of the relief valve exhausted directly to the outdoors at a point high enough to be away from passersby, and not near any windows that open, nor near any air-conditioning or ventilation air intakes.
The system shall be designed to capture the ETO when the door is opened following the completion of the sterilization process. A hood or canopy closed on each end should be installed over the sterilization door. A hood or canopy shall be connected to a dedicated exhaust ventilation system.
Installation of gas line hand valves at the connection to the supply cylinders are required to minimize leakage during cylinder change.
An Audible and visual alarm system shall be installed to alert sterilizer operating personnel if the air flow falls below design cubic feet per minute (L/s).