Abstract: Air purifier in which a sealed housing having an air intake aperture and an air outlet aperture is provided with a blower mounted to circulate the air, and in which a filter and means for receiving a supply of disinfectant and/or perfume are arranged between the blower and the inlet aperture so as to be capable of replacement from the intake aperture. A presettable timer/switch is provided to control the supply of power to the blower, for intermittently actuating said blower.