Patent ID: 7850925

Claim:
A device for aerating a region after injection with vaporized hydrogen peroxide, the device including: 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; a reactive chemistry unit that includes a reactive chemistry that is chemically reactive 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, wherein said catalytic destroyer is disposed in a first conduit defining a first flow path and said reactive chemistry unit is disposed in a second conduit defining a second flow path, said first flow path being parallel to said second flow path; a valve means movable between (1) a first position wherein said first conduit receives air withdrawn from said region, and (2) a second position wherein said second conduit receives air withdrawn from said region; and a controller for moving the valve means between the first and second positions, wherein said valve means is moved from the first position to the second position after the catalytic destroyer has reduced the concentration of the vaporized hydrogen peroxide in the region.