11 Air purifying apparatus, air purifying installations, namely, air purifying machines; Electric air deodorizing apparatus, air deodorizing installations, namely, electric dispensers for air fresheners and deodorizers to be plugged into wall outlets; air sterilizing apparatus, air sterilizing installations, namely, air sterilizer; air filtering apparatus, namely, industrial air filter machines, air filtering installations; air filters for domestic use, air filters for industrial installations