Method of evaluating the UV dose to airborne microorganisms transiting in-duct ultraviolet germicidal irradiation devices1 Scope This document describes a method in laboratory to assess the performance of ultraviolet germicidal irradiation (UVGI) devices which will be mounted in duct in heating, ventilating and air conditioning (HVAC) systems. The method includes the detailed requirements for test rig, microorganisms, procedures, data calculation and result report to determine the UV dose to model microorganisms by an UVGI device at several airflow rates. By the testing

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