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Air Changes Per Hour Calculator

  • TRACS® Portable Air System
    • Portable EZ-Air Purification System

      Air change per hours (ACH):

    • Portable UV-C Air Purifier

      Air change per hours (ACH):

  • TRACS® Air Purification Systems:
    • Model TM1250 Pro Industrial

      Air change per hours (ACH):

    • Free Air Changes Per Hour Calculator

      Model TM500 Ceiling Mount UV-C Air change per hours (ACH):
      Model TM950 Ceiling Mount UV-C Air change per hours (ACH):

The Importance of Air Exchange in Reopening our Schools According to Harvard

In their report titled Schools for Health: Risk Reduction Strategies for Reopening Schools, Harvard authors Joseph Allen and Jose Cedeno-Laurent and University of Boulder Colorado author Shelly Miller recommend adding a portable air cleaner to classrooms that will increase the ACH to five (5). Recommended systems will include a HEPA filter that captures 99.97% of airborne particles. Additionally, a charcoal filter will reduce concentrations of gas-phase pollutants. However, it will have no impact on viruses. 


By promoting air quality in classrooms by giving students access to air that is exchanged no less than five (5) times an hour, not only will schools increase the safety of their students (providing six-foot distancing is maintained), but they will also see an improvement in student performance.

Source: Joseph Allen, Jose Cedeno-Laurent, Shelly Miller. “Health: Risk Reduction Strategies for Reopening Schools” Healthy Buildings Program, Harvard T.H. Chan School of Public Health, 06/2020

Free calculator tool to determine the ACH based on your room dimensions, this is also referred to as "How often is the air recycled in my room".
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