Dosis UVC

A key difference between surface decontamination and airborne
inactivation of organisms is exposure time. Residence time in induct devices is on the order of seconds or fractions of seconds. In a
moving airstream, exposure time is limited by the effective distance
in which the average irradiance was calculated; for instance, at
2.54 ms, 0.3 m of distance takes 0.12 s. Therefore, neutralization
methods against an airborne threat must be effective in seconds or
fractions of a second, depending on the device’s characteristics, and
high UV intensity and/or more in-line depth is generally required.
Conversely, when irradiating surfaces in an HVAC system, exposure
time is typically continuous, so much lower levels of UV intensity
are required.

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