Fogging is somewhat misleading as a term as the most common form does not create a fog as such. Chemical or wet fogging produces a fine mist, whereas dry fogging – more often used where there’s a lot of electrical equipment – does fill the room being treated with smoke.
The fogging process is rapid and efficient. FMs will probably be aware that formerly, an area might be sealed off for days at a time for fogging. Now sanitisation takes a matter of minutes. To avoid disruption and risk of allergic reactions, areas do need to be clear of people. So it should be done outside of working or opening hours, overnight for example.
While the biocide is not toxic, there is always a risk of allergic or other reactions for those present during the fogging operation. At PH Techs 268 we ensure our staff wear the recommended PPE for the agent used.