Air conditioning apparatus and installations; air deodorizing apparatus, namely, electric air deodorizing apparatus; air purifying apparatus; air freshening apparatus, namely, dispensing units for air freshener, electric dispensers for air fresheners; air freshening dispensing units for air freshener dispensing systems; apparatus for neutralising odour, namely, combination ozone sanitizer and electric deodorizing unit; air sanitizing apparatus, namely, electric air sanitizing unit; apparatus ...