Irascible, well said. At 500 fpm the air is moving 8.3 feet per second. I don't even believe a lite tan was in order. I would like to know where the 5800 micro watts seconds/cm squared came from. According to Kowalski at Penn State that number should be considerably higher.
Originally Posted by Irascible
Well said, Ir. Not only is mixing of the air a problem but most particles will not stay in the air long enough to be exposed to the UV light for multiple passes. So only a relatively small percentage of the particles (or bio aerosols as they label them) will receive the tan.