Our biosafety officer is asking us to certify the hepa system within our BioX6 bioprinter. When we contacted Cellink Support they could not tell us what method they use for certifying the system in the factory or recommend a method. Because this acts with a closed door we can't use face velocity like how we certify our biosafety cabinets. I was wondering if anyone had faced this problem and what method they had used. Thank you for your help.