Abstract: A microbicidal filter for treating air, includes, in the allocated direction of flow of the air stream capable of passing therethrough, a filtration layer and a HEPA filter. The filtration layer contains a bactericidal and/or fungicidal agent, and the HEPA filter is pleated while being applied against a second pleated filtration layer that is arranged downstream, so as to prevent the mutual contacting of its pleats. The combination of the action of the impregnated layer and of the HEPA filter inhibits or kills by contact all the living particles that penetrate into the microbicidal filter. The HEPA filter is held in stable application in the pleated shape thereof against the second filtration layer, so that filtering performance deteriorates only gradually.

Abstract: A microbicidal filter for treating air, includes including, in the allocated direction of flow of the air stream capable of passing therethrough, a filtration layer and a HEPA filter. The filtration layer contains a bactericidal and/or fungicidal agent, and the HEPA filter is pleated while being applied against a second pleated filtration layer that is arranged downstream, so as to prevent the mutual contacting of its pleats. The combination of the action of the impregnated layer and of the HEPA filter inhibits or kills by contact all the living particles that penetrate into the microbicidal filter. The HEPA filter is held in stable application in the pleated shape thereof against the second filtration layer, so that filtering performance deteriorates only gradually.