In hospital renovation, "good enough" isn't an option—compliance is mandatory. One of the most critical standards defined by ICRA (Infection Control Risk Assessment) and OSHA is the 12 ACH (Air Changes per Hour) requirement.

If you are operating a negative air machine for hospital construction, failing to document pressure and airflow can lead to project shutdowns. Here is how to achieve 12 ACH and how to ensure your ICRA negative pressure monitoring is bulletproof.

What is the 12 ACH Requirement?

For ICRA Class IV environments, the air within a containment zone must be completely filtered and replaced 12 times every hour. This ensures that "air changes per hour in healthcare construction" meet safety standards to protect patients from dust and pathogens.

How to Achieve 12 ACH (What Actually Creates It)

To achieve 12 ACH, contractors must use properly sized negative air machines based on the room’s total volume and the machine’s CFM (Cubic Feet per Minute) rating. While the machines generate the airflow, a differential pressure monitor for hospitals is required to verify that the containment remains sealed.

Why OmniGuard 6 is Essential for Negative Pressure Compliance

It is important to note: The OmniGuard 6 does not calculate or generate ACH. Instead, it is the industry’s "Gold Standard" for monitoring and documenting the negative pressure created by your air machines. Without this documentation, you cannot prove your 12 ACH environment is performing safely.

Key Features for ICRA Compliance:

• Automated Job Logs: Includes a built-in cellular modem (with 2 years of free service) and Wi-Fi to send automated status reports to off-site personnel.

• Tamper-Proof Records: Features an integrated thermal printer for immediate on-site physical logs and a USB port for digital export.

• Real-Time Alerts: Use the OmniGuard Mobile App to receive instant notifications if pressure drops, ensuring your negative pressure containment is maintained and documented 24/7.

• High Precision: Accuracy of ± 0.003" WC ensures you are alerted to even the slightest breach in your containment barrier.

How to Calculate Your Air Changes

To determine if your negative air machine is powerful enough to hit the mandate, use this formula:

(Total Machine CFM x 60) / Room Volume (Cubic Feet) = ACH

Once you have the right airflow, the OmniGuard 6 acts as your compliance "black box," recording every second of pressure data to satisfy hospital inspectors and OSHA requirements.

Need help ensuring your containment meets ICRA requirements?

Don't leave your compliance to chance. Pair your high-output Negative Air Machines with the OmniGuard 6 to automate pressure monitoring, logging, and reporting for your next healthcare project.

[Browse ICRA Negative Pressure Monitoring Tools at Spycor Environmental]