Abstract: A closed loop vapor decontamination system for decontaminating a defined region. A chamber defines the region. A first fluid flow path connects at both ends to the chamber to define a closed loop path through the chamber. A second fluid flow path connects at both ends to the chamber to define a closed loop path through the chamber. The system has a means for conveying a carrier gas simultaneously along the first and second fluid flow paths. A generator generates vaporized hydrogen peroxide and is disposed along the first fluid flow path for introducing vaporized hydrogen peroxide into the carrier gas as it circulates through the first fluid flow path. A destroyer converts the vaporized hydrogen peroxide into water and oxygen and is disposed along the second fluid flow path for breaking down the vaporized hydrogen peroxide in the carrier gas as it circulates through the second fluid flow path. A controller operates to control the amount of the carrier gas flowing along the first and second fluid flow paths.

Abstract: A method and apparatus for metering a predetermined quantity of liquid decontaminant into a vaporization system. A single vacuum source is used to fill an injector with the predetermined quantity of liquid decontaminant and to also establish a vacuum in a chamber. The chamber is injected with the liquid decontaminant filling the injector. The liquid decontaminant is vaporized in the chamber to produce a vaporized decontaminant.