1. In step 1, the initial required UV dose should be estimated using the correct UV dose-response behaviors for the targeted microorganism. For microorganisms with unknown UV rate constants, methods exist to predict the UV rate constant and required UV dose primarily based on the microorganism's type, structure, and genome sequence. Suppose multiple airborne pathogens are targeted in the in-duct environment; in that case, the least sensitive microorganism to UV illumination (lowest UV rate constant) should be used as the UVGI system design and evaluation target. Then, based on the target bioaerosol particle size and UVGI system operating conditions, the required UV dose should be further adjusted;The selected UV equipment must undergo on-site or off-site evaluations. If the system fails to meet the requirements
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