IQAir individually tests each HealthPro Series at the factory to verify that your HyperHEPA filtration is meeting our exacting standards in reality, not just theory. We test total system efficiency – the actual air coming out of the outlet. If the system is not delivering 99.97% cleaner air or better, we don’t ship it. Period. The results of the tests are detailed in a hand-signed Certificate of Performance, which is shipped with every HealthPro system.