Abstract: A closed container has openings at an input end for drawing air into the container and openings at the output end for passing air out of the container. An ozone generator is disposed inside the container adjacent the input end and a corona generator is disposed in the container adjacent the output end. The corona generator includes a dielectric made of a material having a dielectric constant of 1000 or greater. Impure air which is drawn in at the input end passes over the ozone generator whereby the ozone reacts with the impurities of the impure air to provide purified air. The purified air with remaining ozone is passed over the corona generator means to destroy the remaining ozone.