In contrast to thermal foggers, our ULV Cold Fogger models allow the operator to control the size of the droplets, which allows for versatility and cost effectiveness Moreover, thermal foggers use heat to vaporize the liquid solution and turn it into a visible fog Thermal foggers are therefore better suited for outdoor use, such as in the insecticide industry Our ULV Cold Foggers, on the other hand, are designed to be used indoors to clean, sanitize and disinfect public spaces by killing viruses and bacteria from surfaces as well as airborne pathogens.