HEPA Efficiency against Viruses in Air Travel

Since the pandemic, an additional fear of catching COVID onboard while travelling came to the question. HEPA (High-Efficiency Particulate Air) filter has been the magic word when it comes to air purification from household air purifiers to not surprisingly, airliners. The European Air Purification classifications define a HEPA filter to be able to remove particles that are larger than 100-200nm in size from 85% up to 99.999995%. This standard, however, varies across the globe but the figures are not too far apart. Luckily, modern aircraft are equipped with HEPA filters in accordance with aviation regulations. Let us take a look into what HEPA means for us as passengers.

HEPA effectiveness against Viruses

According to a document published by IATA,

HEPA or high-efficiency particulate air filters have similar performance to those used to keep the air clean in hospital operating rooms and industrial clean rooms. These filters are very effective at trapping microscopic particles as small as bacteria and viruses.

Whilst this statement is reassuring, it does not cover the fact that not 100% of the viruses are filtered out. The diameter of a virus particle varies typically from 80-100nm while in extreme cases the range can be up to 20-500nm. It may be true that the air circulation system is highly effective as it takes approximately 3 mins to filter out completely the amount of air in the cabin on an Airbus aircraft. On an Airbus320, HEPA filtered air is distributed in 3 types of vents: the outer skin outlet above the window, the outlet above the overhead luggage compartment, and the adjustable knob outlet above each seat. This design ensures that heavier particles will not be stirred up and will drop to the bottom along with the airflow and be collected by the gap between the outer skin of the cabin and the floor panel. The air collected is then passed through the HEPA filter before it enters the mixing unit which replaces about 60% of the airflow with conditioned atmospheric air. This makes the filtration system of modern aircraft surprisingly effective in trapping airborne particles containing viruses.

to illustrate the circulation directions (HEPA filter)
Filtered air flows from the overhead nozzles to collecting vents near the footrest area|©IATA

Minimising Risk as a Passenger

Despite the highly efficient circulation system against viruses with HEPA filter, the system will not be operated to a full extend while the aircraft is on the ground when the airflow is relatively low. This means that it will take longer for droplets to reach the ground and hence increase the risk of contact with viruses. Therefore, it might be a good idea to just sit back and relax before the aircraft is in its cruising phase. Many airlines have implemented a strict mask-on policy onboard the aircraft and travellers are requested to comply strictly as the crew has the authority to offload any passenger that does not comply with such regulations.

If you are interested in the latest news on the new variant of the virus and how it affects air travel, click here.

Do you feel comfortable travelling by air during the pandemic?

Subscribe to our Weekly Digest!




More News

Leo Cheung
Leo Cheung
Aviation Reporter - Born and raised in Hong Kong, Leo has decided to pursue a career in aviation under the influence of the old Kai Tak Airport back in the days. With a degree in aviation, he has joint Travel Radar as an aviation reporter to diversify his views and apply professional knowledge to anyone who is interested in commercial aviation. He regularly contributes articles with 'inside the cockpit' knowledge.

1 COMMENT

LEAVE A REPLY

Please enter your comment!


>
Wordpress themeseotakipçi satın alankara implant fiyatları11yol kapanıpassport psdbatman evden eve nakliyatbalkon köşe takımılastik patlatanevden eve nakliyatkartal evden eve nakliyatfatih antika eşya alanlarfenerbahçe antika eşya alanlarnakliyatantika alanlarantika alanlarwoocommerce baselJannah themeeskişehir inşaat şirketlerieskişehir uydu tamirkitap alanlarantika alanlarantika alanlarseoEskişehir uydupgcdpgcdpmsatuzla evden eve nakliyatAntika alan yerlergaziantep evden eve nakliyateskişehir saç protezihayır lokmasıtuzla evden eve nakliyathayır lokmasıpendik evden eve nakliyatgölcük evden eve nakliyatgölcük evden eve nakliyatistanbul evden eve nakliyatankara evden eve nakliyatporselen kaplama dislerankara diş estetiğidiş teli tedavisimersin evden eve nakliyatEtimesgut evden eve nakliyattuzla asansörlü nakliyatkartal evden eve nakliyatgebze evden eve nakliyatankara evden eve nakliyatankara parca esya tasımaankara gülüş tasarımıankara gülüş tasarımıankara implant fiyatlarıniğde evden eve nakliyatistanbul saç ekimiankara çıkışlı günübirlik turlarEtimesgut evden eve nakliyatEtimesgut evden eve nakliyatkadıköy evden eve nakliyatmersin evden eve nakliyatçankaya evden eve nakliyatankara parca esya tasımamaltepe evden eve nakliyattuzla evden eve nakliyatankara implant fiyatlarıankara gülüş estetiğiyenimahalle evden eve nakliyaten yakın çekiciAntalya Çitseo çalışmasıistanbul hayır lokmasıata şehir evden eve nakliyatmaltepe evden eve nakliyatüsküdar evden eve nakliyatİstanbul evden eve nakliyatmaldives casinospoodleistanbul hayır lokmasıKartal evden eve nakliyatçankaya evden eve nakliyatataşehir evden eve nakliyatankara ofis taşımacılığıboğazda özel tekne kiralamadiş eti ağrısıtuzla nakliyateryaman evden eve nakliyateskişhir uydu servisieskişhir uydu servisipoodlepomeranianzibilyonbet girişdextools trendingdextools trending botdextools trending costdextools trending servicedextools trending algorithmdextools botcoinmarketcap trendingcoinmarketcap trending botpinksale trendingpinksale trending botpancakeswap botuniswap botpancakeswap sniper botuniswap sniper botfront running botfront run botmev botzibilyonbet girişdextools botdextools trending algorithmpinksale trending botprediction botpancakeswap prediction botEtimesgut evden eve nakliyatankara gülüş tasarımıbatman nakliyatmersin nakliyatköpek ilanlarımersin evden eve nakliyatankara evden eve nakliyatMedyumeskişehir uydu servisimersin evden eve nakliyatetiler antika alanlarataşehir antika alanlareskişehir emlakAnkara implant fiyatlarıİstanbul mevlid lokmasıbatman evden eve nakliyattuzla evden eve nakliyatçankırı evden eve nakliyatderince evden eve nakliyatankara evden eve nakliyatankara ofis taşımacılığıankara asansörlü nakliyatankara eşya depolamamersin evden eve nakliyatboerboel yavrupomeranian ilanlarımarsbahiscasibomcasibomEtimesgut evden eve nakliyattuzla evden eve nakliyattarsus evden eve nakliyatçankaya evden eve nakliyatkeçiören evden eve nakliyatEtimesgut evden eve nakliyatortodontigoogle adskeçiören evden eve nakliyatsancaktepe evden eve nakliyatgülüş tasarımıEskişehir yabancı dil okuluvozol 12000Etimesgut evden eve nakliyatbetturkeytuzla evden eve nakliyatkadıköy evden eve nakliyatetimesgut evden eve nakliyatlamine dis kaplamadis beyazlatmamamak evden eve nakliyatomegleköpekçislotellapoodle ilanlarıkaliteli replika saatUcuz uc satın alPubg ucgölbaşı evden eve nakliyatprefabrik evoto çekicişehirler arası nakliyatsancaktepe evden eve nakliyatpendik evden eve nakliyatporselen lamine kaplamaEtimesgut evden eve nakliyatçankaya evden eve nakliyatkocaeli evden eve nakliyateskişehir televizyon tamirimersin evden eve nakliyatpoodlemamak evden eve nakliyatdarıca evden eve nakliyatankara gülüş tasarımıankara asfalt bakımetimesgut evden eve nakliyatEskişehir özel ingilizce dersiankara asansörlü nakliyatankara evden eve nakliyatantikaantikaantika eşya alanlarmağaza koku makinesi
deneme bonusuCasinoslot girişbig bass bonanza oynaAviator oynasugar rush oynasweet bonanzagates of olympus oynaBahisnowcasibom girişCasinoslotwild west gold demo oynaredbullholdenracing.comdenemebonususiteler.commarsbahisMatadorbetEscortSaatlik escortManisa escortGümüşhane escortfethiye escortDeneme Bonusu Veren SitelerDeneme Bonusucasibomcasibom girişŞişli escortizmir escortDenizli escortMalatya Escortşanlıurfa escortHacklinkBeşiktaş escortAtaşehir escortBeylikdüzü escortkadıköy escortcialisViagraBahis siteleriEsenyurt escortmasözmasözantalya escortcasibombonusbetturkeyfixbetdeneme bonusu veren sitelerdeneme bonusu 2024casibombets10jojobet girişpusulabetbetmatik twitterbaywinGrandpashabetcasibomholiganbetbettilt girişcasibom girişslot sitelerisekabetbetmatikbetkanyonsekabetholiganbetbetmatikcasibomcasibomcasibomcasibomcasibomcasibomcasibomcasibomcasibomhitbetsahabetsahabetbettiltvdcasinoilbetcratosroyalbettümbetbaywinslot sitelericanlı casino sitelericasino sitelerislot siteleribahis siteleribaywinİnterbahisqueenbetmadridbetartemisbetcasibomEsenyurt EscortBursa EscortErzincan EscortKayseri EscortMuğla EscortAlanya EscortBahçeşehir EscortgrandpashabetmatadorbetBetofficebahiscomcasibombetkomcasibomcasibombetkomcasibomDeneme bonusu veren sitelerbetriyalbetparkbetpark girişbetriyal girişelitcasinomavibetbetcupmarsbahiscasibomcasibomcasibomcasibomcasibomcasibomcasibomcasibomcasibomPusulabetsahabetsahabet1xbetbahiscombycasinoikimisliorisbetkaçak maç izlecasibom girişcasibom girişcasibom girişcasibom giriş twittercasibom girişcasibom girişfreespin ne ise yararNisanbettipobettipobet,tipobet giriş,tipobet twitterelitcasino,elitcasino güncel giriş,elitcasino twitter,elitcasino girişcasibomCasibom