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How often must HEPA filters be certified?

A Every 6 months

USP ,797. states that HEPA filters must be certified every 6 months unless they become wet or damaged and therefore need to certified at the time of the incident.

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Jordan Riley

1 year ago

Amazing for studying

Ray C

1 year ago

I feel that the app has and will continue tohelp me to understand the information needed to pass the PTCE.

Nesha Pegeese

1 year ago

Very useful

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