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What Are Air Changes Per Hour & Why Are They Vital?

Do you know what air changes per hour is and why is it important? If not, don’t worry! You’re about to learn everything you need to know. Air changes per hour (ACPH) is the measurement of how many times a volume of air within a room will be added, removed, or exchanged with air. This rate varies based on location – for example, it’s typically higher in hospitals than in residential homes. Improving indoor ventilation can reduce the risk of virus transmission, so it’s vital that consumers are aware of the ACPH rates before purchasing any filter.

Air Changes Per Hour Recommendation By ASHRAE

Improving indoor ventilation can reduce the risk of virus transmission; thus, consumers need to be aware of the ACPH rates before purchasing any filter. A minimum of six air changes per hour is recommended for all occupied spaces. Air changes may need to be increased based on the activity in the space, the number of people in the space, and other factors. As per our point earlier, ACPH rates vary based on locations, and ASHRAE recommends that homes receive no less than 0.35 air changes per hour of outdoor air to ensure adequate indoor air. For highly infectious areas, such as operating rooms, air changes per hour may need to be increased to 12 or more.

Higher Air Changes per Hour

Air changes per hour is important for ensuring adequate indoor air quality, a higher ACPH rate can help control moisture levels as well as mold and mildew. Not only that, but it also removes hazardous particles at a faster rate, yet the biggest challenge with increasing the air changes per hour rate is that it will also increase energy consumption.

Air Changes per Hour in HEPA Air filter

The air changes per hour will also be affected by the type of air filter you’re using. HEPA filters are the most efficient and cost-effective ways to achieve the desired amount of air changes per hour.

HEPA air filters can remove 99.9% of particles that are 0.03 microns in size from the air – much smaller than the human eye can see! You should take into consideration how much air volume you’ll need to filter and how long it needs to be filtered. Using HEPA air purifiers can add to your air change methods by removing airborne particles from room air, such as dust and viruses.

If you’re looking to improve your premises’ air quality, make sure to consult a professional who can help you find the right air filter for your needs.

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