An apparatus for decontaminating articles comprised of:a decontamination chambera conveyor for conveying articles to be decontaminated along a first path through the decontamination chambera vaporizing unit connected to the decontamination chamber, the vaporizing unit disposed above the decontamination chambera blower for conveying a carrier gas through the vaporizing unit and through the decontamination chamberheating means for heating the carrier gas flowing through the vaporizing unita source of liquid hydrogen peroxide fluidly connected to the vaporizing unit andan injection device for injecting liquid hydrogen peroxide into the vaporizing unit.