Negative-Pressure Room Verification

Daily AIIR (airborne infection isolation room) negative-pressure verification per CDC + ASHRAE 170. Critical for TB and COVID isolation.

Room Identification and Status

• AIIR room identifier recorded
  Document the room number, unit, or location being verified.
• Room designated for airborne isolation use
  Confirm the room is currently assigned to airborne infection isolation use.
• Current patient isolation indication documented
  Record the reason for isolation, such as TB, COVID-19, or other airborne precaution.

Pressure Differential Verification

• Negative pressure confirmed at room entry
  Verify airflow is inward from corridor to room using the facility-approved method.
• Measured pressure differential recorded
  Record the pressure differential between the room and adjacent corridor or anteroom.
• Pressure monitoring device or indicator functioning
  Confirm the room pressure monitor, gauge, or visual indicator is operating and readable.
• Pressure reading stable during observation period
  Confirm the negative pressure condition remains stable during the inspection observation period.

Air Handling and Containment

• Door closed and self-closing function intact
  Verify the isolation room door is closed and the self-closing mechanism operates properly.
• No obvious air leakage at door, pass-through, or penetrations
  Check for visible gaps, drafts, or other signs of air leakage that could compromise containment.
• Exhaust and supply air system operating as intended
  Verify the room ventilation system is running and supporting negative-pressure containment.
• Air changes per hour documented
  Record the current air changes per hour if available from the facility monitoring system or engineering record.

Documentation and Corrective Action

• Deficiencies documented with immediate notification
  If any critical item failed, confirm the issue was documented and escalated to engineering, infection prevention, or the supervisor on duty.
• Corrective action recorded for any non-conformance
  Describe the corrective action taken or initiated for any deficiency, including who was notified and when.
• Inspector signature
  Inspector attestation that the daily verification was completed.