Replace the existing content with the following new content: This part of IEC 63086 applies to electrically powered household and similar air cleaners intended for use on rated single-phase AC input voltage circuits not exceeding 250 V and DC input voltage circuits not exceeding 48 V. For combination products, this document is to be used to measure the performance of the appliance at reducing pollutants. This document is not applicable to: " appliances intended exclusively for industrial purposes; " appliances intended for use in medical treatment locations, such as surgical suites, laboratories, medical treatment rooms; " cooking fume extractors (see IEC 61591) NOTE 1 See Clause 4 for examples of different technologies and placements of household and similar air cleaners. NOTE 2 Battery-operated appliances are within the scope of this document. Dual-supply appliances, either mains supplied or battery-operated, are regarded as battery-operated appliances when operated in the battery mode. NOTE 3 A cooking fume extractor and an air cleaner differ significantly in their main use. A cooking fume extractor is designed to capture fumes close to the cooking surface in a kitchen environment. In the case of the cooking fume extractor, the focus is on the direct capture of the cooking fumes (first yield capture rate), whereas in the case of air cleaners, the focus is on general household air pollutant reduction.