Corrosive chemicals may require more frequent cleaning, so follow the manufacturer's instructions.
The frequency of cleaning also depends on the type of process. High-volume processes with hazardous fumes require more frequent cleaning, such as working with high concentrations of acid
Use the right filter for the chemicals used in ductless fume hoods. Cleaning frequency depends on the volume and type of chemicals used.
Ducted fume hoods exhaust fumes out of the lab. Cleaning frequency may depends on the type of process and volume of chemicals used, but generally less frequent than ductless hoods.