Virbac Knockout Room Fogger
If you have an extremely large room, warehouse, basement area, and want the most coverage, use Virbac Knockout Room Fogger. This spray will treat an approximate 1500 square feet of space, but since it is the most expensive fogger on the list, you'll pay a premium for that. It is made of two synthetic pyrethrin active ingredients, and uses NYLAR as a growth regulator that lasts up to 7 months. According to the EPA, large cans of fogger should not be used in smaller rooms due to a possible explosive situation. Heed that advice when using this bad boy.