HEPA (high efficiency particulate air) filters are key components of cleanrooms. As cleanroom industry experts, we at Vernick & Associates field many queries from clients regarding their air filtration systems.  Below are the answers to a few of the most common questions we hear regarding HEPA filters.

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1. What is the role of HEPA Filtration in cleanroom settings?

Prior to entering the cleanroom, air is heated/cooled, humidified/dehumidified by the HVAC system, and passed through HEPA filters which ensure that microscopic particles are removed before they can enter the cleanroom, thus reducing particulate contamination.

2. What is the shelf life of a HEPA filter?

According to the publication “Technical Bulletin – FAQ:  HEPA & ULPA Air Filters,” published by manufacturer Camfil Farr, the shelf life on most HEPA filters, including those manufactured by Camfil Farr, is 10 years. That is assuming that filters are stored according to manufacturers’ recommendations in their original packaging, are not subjected to temperature extremes, and are kept in a dry, climate-controlled area.

3. What is the life span of a HEPA filter?

The technical bulletin from Camfil Farr states that the longevity of a filter depends on the operating conditions. While 10 years is generally the recommended life span, “at minimum, the filter [should] be replaced when the pressure drop reaches two times the initial pressure drop (assuming ‘normal’ design).”  Further, some industries, such as bio-pharma, have their own established guidelines stating that filters must be changed at shorter intervals, for example five or seven years.

With decades of experience in Ohio and throughout the Midwest, Vernick & Associates is the company to turn to for cleanroom design and construction. If you have any further questions about your cleanroom, HEPA filtration, or any other components, please consult our FAQs, or contact us at (216) 373-2330. We’ll be happy to discuss our design-build process with you and help you consider the options that will meet your specific industry’s standards.


“Technical Bulletin – FAQ: HEPA & ULPA Air Filters.” Camfil Farr.