Editing Fog machine (section)

===Industrial uses===
{{See also|Smoke testing (disambiguation)}}
Ultra Low Volume (ULV) fogging is used by pest control industry and cleaning companies. ULV refers to the droplet size (between {{Convert|20-30|μm|sp=us}}) generated by these fog machines. This fine droplet size is known<ref name=":0">{{Cite web|url=http://pesthqmackay.com.au/fog-machine-droplet-size/|title=Fog Machines: The Optimal Pest Control Droplet Size|website=Mackay Pest Control|access-date=2016-09-22}}</ref> as the optimum size for pest control. Traditional thermal fog machine technology has difficulty reaching crawling pests such as roaches, flea, and rodents due to the droplet size being too fine (less than {{Convert|10|μm|sp=us}}). It is often found that small droplets are blocked by the "air-curtain" of insects and rodents.{{Citation needed|date=September 2010}}<ref name=":0" /> Cold Fogging, in contrast, is heavy enough to penetrate these "air-curtains" as well as light enough to be evenly distributed within a room.