With the ever increasing need to save money and to be environmentally responsible there are other considerations that need to be explored before a decision can be reached.
Protection of the User
This should be the most important consideration as both ducted (recirculating) and ductless fume cabinets aim to remove pollutants away from the user. Vapors from liquid chemicals and particles from powders should be extracted away, as quickly as possible without re-circulation occurring or any chance of reduced efficiency.The ductless fume cabinets de-activate vapors and particles by activated carbon technology in the filter and remove powder dust by HEPA filtration so that there is no risk of contamination for the user. Chemical vapors and powder particles are not dissipated into the external atmosphere either which means a cleaner environment for all and a lower carbon footprint. The recirculating fume cabinet is the more sustainable solution for the protection of laboratory personnel. Read more about Valiquest and the ESP Program.