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CSA Z317.2-2019 pdf free download
CSA Z317.2-2019 pdf free download.Special requirements for heating, ventilation, and air-conditioning (HVAC) systems in health care facilities.
means shall be in place to ensure these pressure differentials are maintained during the ongoing operation of the HCF. The airflow direction and pressure differential shall be such that air movement is always from clean areas to less clean areas.
1) These high-level air separation rooms are designed and built to create inward (negative pressure for AIRS) or outward (positive pressure for PERs) directional airflow to or from the room, relative to the adjacent area.
2) The required pressure differential is for steady-state conditions. It is intended to provide a margin of safety in the event of any leokage, and to reduce the recovery time for return to safe range after the opening of the door
The air flow rate into or out of AIRs and PERs may only be varied for the purposes of controlling differential air pressure. AIRs and PERs shall not be used in more than one pressure mode. Alternative configurations such as negative/positive, negative/neutral, or positive/neutral relative pressurization shall not be used.
If a procedure room is intended to serve both functions (i.e.. both airborne isolation and protective environment), it shall be equipped with an anteroom. The anteroom shall be ventilated, and the pressure shall be maintained negative to both the procedure room and the corridor. Air shall flow from the procedure room into the anteroom and from the corridor into the anteroom. The air removed from the anteroom and the procedure room shall be exhausted to the outdoors.
An auditory and visual alarm indicating that the pressure relationship or airflow is not being maintained shall be provided with the following:
a) A local alarm shall be provided just outside the room and at the nurse’s station or other point of continuous supervision to indicate whether the room airflow direction is (or is not) being achieved.
b) Room pressure, alarm system, and supply and exhaust system shall be monitored by a central alarm and control system.
c) The minimum set point for the alarm should be no lower than 2.5 Pa.
d) The audible portion of the alarm may be disabled when the room is not being used for an isolation function. The method used to enable or disable the alarm shall affect both the central and local alarm in the same way.
e) The facility shall have an operational mechanism to ensure an audible alarm is enabled when a patient requiring isolation is identified (e.g., during the intake or admission process).
Note: This Standard requires monitoring of total differential pressure (i.e., room to corridor). A single monitoring system is sufficient; however, multiple monitoring points (i.e., corridor-to-anteroom, and anteroom-to-room) can provide better monitoring of airflow directions.CSA Z317.2-2019 pdf free download.
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