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Ventilation for AII/PE rooms shall meet the following requirements:
  1. Supply air diffusers shall be located above the patient bed.
  2. Exhaust grilles or registers shall be located near the patient room door.
  3. The pressure relationship to adjacent areas for the required anteroom shall be one of the following:
    1. The anteroom shall be at a positive pressure with respect to both the AII/PE room and the corridor or common space.
    2. The anteroom shall be at a negative pressure with respect to both the AII/PE room and the corridor or common space.
  4. AII/PE rooms shall have two permanently installed devices and/or mechanisms to constantly monitor the differential air pressure. One device and/or mechanism shall monitor the pressure differential between the AII/PE room and the anteroom. The second device and/or mechanism shall monitor the pressure differential between the anteroom and the corridor or common space. For each device and/or mechanism, a local visual means shall be provided to indicate whenever differential pressure is not maintained.

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