An apparatus for decontaminating articles comprised of:a decontamination chamber (500A, 500B)a conveyor (14) for conveying articles (12) to be decontaminated along a first path through said decontamination chamber (500A, 500B)a vaporizing unit (300A, 300B) connected to said decontamination chamber (500A, 500B), said vaporizing unit (300A, 300B) disposed above said decontamination chamber (500A, 500B)a blower (322) for conveying a carrier gas through said vaporizing unit (300A, 300B) and through said decontamination chamber (500A, 500B)heating means (352) for heating said carrier gas flowing through said vaporizing unit (300A, 300B)a source of liquid hydrogen peroxide (114) fluidly connected to said vaporizing unit (300A, 300B) andan injection device (410) for injecting liquid hydrogen peroxide into said vaporizing unit (300A, 300B).