Patent ID: 7988911

Claim:
A method for sterilizing and aerating a region, the method comprising the steps of: injecting vaporized hydrogen peroxide into the region at a sufficient concentration to lethally neutralize biological contaminants contained within the region; maintaining the concentration of the vaporized hydrogen peroxide within the region for a sufficient amount of time to lethally neutralize the biological contaminants contained within the region; flowing the vaporized hydrogen peroxide through a catalytic destroyer having a chemistry that catalytically reacts with the vaporized hydrogen peroxide to reduce the concentration of the vaporized hydrogen peroxide in the region; and subsequently flowing the vaporized hydrogen peroxide through one or more replaceable cartridges filled with a liquid solution comprised of a reactive chemistry that chemically reacts with the vaporized hydrogen peroxide to measurably reduce the concentration of the vaporized hydrogen peroxide in the region, wherein said reactive chemistry undergoes a color change only when a component of the reactive chemistry is fully consumed due to reaction with the vaporized hydrogen peroxide, said vaporized hydrogen peroxide flowing through the catalytic destroyer prior to flowing through the one or more replaceable cartridges filled with the liquid solution to sequentially reduce the concentration of the vaporized hydrogen peroxide.