When using the Commander Tri-Jet Fogger you would want to replace the Replacement Filters on average after you use it about 4 times, per the manufacturer. With that said, as long as the material is getting clean and the elastic is still fitting properly around the unit they are still usable.
The Replacement Filter for Commander Tri Jet Fogger will only fit the Commander Tri-Jet Fogger. The Fogmaster 7401 machine does have an intake filter on it, and you can purchase replacement filters directly from the manufacturer. You can reach Fogmaster at 954-481-9975 to order.
