The DosyMist® is a vaporised H2O2 generator for airborne bio-decontamination of surfaces in rooms or enclosures. It is a device designed exclusively for pharmaceutical applications allowing easy and quick validation. It employs a cold vaporization technology by micro-nebulization offering an excellent dispersion as a dry fog (dry fog). The process is effective without the need for prior dehumidification and does not require high concentrations of H2O2. The sporicidal effect is produced by micro-condensation on exposed surfaces without corrosive effect on materials.