Biodecontamination of a system by means of vaporized H202 Hydrogen Peroxide. Klenzaids collaborated with Syntegon Technolgies GmbH in Crailsheim, Germany to co-develop and pioneer KlenzVap a modular evaporator system which is now installed successfully on many small and large isolators. Dosage of Hydrogen peroxide into a system can be controlled according to the targeted volume to be Bio-decontaminated. KlenzVap unit includes weighing balance system inbuilt to the unit to monitor weight of H202 (Hydrogen Peroxide) during proccess. Scalable for multiple containment chambers by appropriate distribution valves and piping.