Due to its design, wall mounted bactericidal irradiator OBN-150m for two bactericidal 30W lamps allows to carry out decontamination of premises in the presence of people. The irradiator is mounted horizontally on the wall, with the upper lamp closed with the screen, and disinfection is carried out due to air convection. For rapid disinfection the bottom open lamp is used. Connection of each lamp is carried out separately. The switch is desirable to have in a separate room, and there is a need to report on the prohibition of finding staff in the room.