Samsung Air Conditioner’s unique triangular design improves its performance, circulating cool air faster, farther and wider* around your home. Its Digital Inverter also provides significantly greater energy efficiency.* And its Virus Doctor and Easy Filter eliminates dust, contaminants, allergens, bacteria and viruses* - firstly using a filter and secondly with Virus Doctor. * Tested on AR09HSFSBWK model. Compared with Samsung conventional model AQV09TWS. * Tested on AR09HSSDAWK/EU. Compared with Samsung conventional model AQ09TSB. * Tested in Kitasato Environmental Science Centre ( Japan) & Yonsei Univ.( Korea) /Korea test lab ( FITI/KEMTI) and Japan test lab ( ITEA) . Effective on 4 viruses, including Subtype H1N1, and certain bacteria. Data has been measured under specific testing conditions and may differ based on environmental factors.