Thermal Fogging

A thermal fogger is appropriately named since it is a device that uses heat to produce a fog without degrading the active ingredient. A thermal fogger produces a range of droplet sizes including a large number of very small droplets. This makes a thermal fogger the preferred type of equipment to reach air spaces in areas highly obstructed by vegetation, or other physical obstructions in buildings. The large number of very small droplets produced in a thermally generated fog also make the fog highly visible. This can help the operator to monitor the fog and ensure thoroughness of application.

Ultra-Low-Volume ( ULV) Cold Fog

A ULV sprayer generates fog droplets by using a high volume of air at low pressure. Such a system enables droplets of a more precise size to be generated. The absence of a large number of very small droplets will limit the penetration of the fog into highly obstructed areas. ULV sprayers can dispense formulations in a more concentrated form since less diluent is required. Also, the ability to be able to calibrate the machine to produce droplets of the optimum size for the type of chemical being used make ULV spraying the method of choice whenever possible.