PollutionsApollutantisawastematerialthatpollutesair,waterorsoil.Airpollutioncomesfrombothnaturalandmanmadesources.Thoughgloballymanmadepollutantsfromcombustion,construction,mining,agricultureandwarfareareincreasinglysignificantintheairpollutionPollutionbegantodrawmajorpublicattentionintheUnitedStatesbetweenthemid-1950sandearly1970s,whenCongresspassedtheNoiseControlAct,theCleanAirAct,theCleanWaterActandtheNationEnvironmentalPolicyAct.IndoorAirContaminantsIndoorAirParticleSettlingRateMoreandmoremedicalstudieshaveimplicatedthehealthriskscausedbyfineandultrafineparticles.Thishasresultedineffortstoimposemoresevererestrictionsonindustrialandtrafficemissionsinthecomingyears.Industry,traffic,andvariouscombustionprocesseshavebeenidentifiedasthemajorsourcesoffineparticles.Ofallparticles,theaccumulationsizeparticles(0.1-1mindiameter)arethosethatenterrespiratoryorgansaswellasairconditioningsystemsmosteasily.Manystudieshaveimplicatedthatevenfinerparticlesthantheseposeahealthhazard.Intermsofnumberofparticles,morethan80%areultrafine,thatis,0.01-0.1mindiameter.HealthEffectsfromParticlesSizeWhenconsideringthehealtheffectsofparticles,particlesizeisthekeyfactor.Particlesmorethan10m(microns)indiameterdonotgetasfarasthelungs,astheyarenormallycaughtinthenasalcavityandthepharynx.Particlessmallerthan10micronsmayentertheupperrespiratorytractjustunderthepharynx,wheresomeofthemarecaughtandremoved(bycoughing,spittingorswallowing).Particlessmallerthan5micronmayenterthebronchiintheupperlungs,whileparticlessmallerthan2.5micronsmaygetdeepintothepulmonaryalveoliwherecarbondioxideinthebloodisexchangedforoxygen.Theseparticlesareextremelyhazardous,becausethehumanlunghasnoefficientmethodofremovingthem.Iftheseparticlessmallerthan2.5micronsarewater-soluble,theywillenterthebloodcirculationinamatterofminutes.Iftheydonotdissolveinwater,theywillaccumulatedeepinsidethelungs.VolatileOrganicCompoundsVOCscanbeproducedbyanumberofcommonhouseholdactivitiesorincluding:*Paints,paintthinners,varnishesandothersolvents*Aerosolsprays*Airfresheners,candlesandincense*Cleaningsuppliesanddisinfectants*Storedfuelsandautomotiveproducts*Hobbysupplies*Glues,adhesivesandsealingcaulks*Dry-cleanedclothing*Newcarpeting*Secondhandsmoke*Pressedwoodfurniture*Newspapers*Mothrepellants*Woodpreservatives*CookingWhatyoucantseecanhurtyou:-Youmaynotrealizeitbutyouandyourfamilycanbeexposedtothousandsofvolatileorganiccompoundsonadailybasis.VolatileOrganicCompounds(VOCs)arechemicalsthatevaporateintopotentiallyharmfulgasesatroomtemperatureandmayormaynotexudeanodor.VOCsincludeavarietyofchemicalswhichcancauseshort-andlong-termhealthproblems.BasicHVACSystemAirFilterQualityYou wanted to know about filters BUTdidnt know who to ask!6ProvenAirCleaningTechnology1)PreFilter.Theairfirstentersprefilter,capturingthelargestparticles,whichenhancesthedurabilityandperformanceoftheotherfilters.2)High-EfficiencyHEPAFilter.Themosteffectivetypeofairfilteratcapturingdust,allergensandothersolidparticles(includingbacteria).HEPAfiltersarerecommendedbytheU.S.DepartmentofHomelandSecurity.TheS5000usesapermanent,washableHEPA,soitdoesnotrequirereplacement.3)ActivatedCarbonFilter.Thebesttypeofairfilterfortrappingchemicals,gases,odorsandcigarettesmoke.AccordingtoPennStateDept.ofAerobiologicalresearchers,carbonfiltersservetoremoveodors,volatileorganiccompounds(VOCs)andchemicalsthatotherfilterscannot.4)PhotocatalyticOxidationFilter.Thisfilteriscoatedwithtitaniumdioxide,whichproduceshighlyreactiveionsandelectronswhencombinedwiththeUVlightfromtheS5000sUVlamp.Thesehighlyreactiveionsattachtochemicalmolecules,bacteriaandodor-causingcompounds,destroyingthemthroughoxidation.Independenttestsbyresearchscientistshaveprovenphotocatalyticoxidationtobyhighlyeffective.5)GermicidalUVLamp.Themosteffectivewaytodestroymicro-organisms,suchasgerms,viruses,fungi(suchasmold)andbacteria.Alsodestroysmicro-organismsincludingthosethataretrappedbytheHEPAairfilter,preventingthemfromreproducingandrecirculatingthroughtheroom.UVlampsarerecommendedbytheU.S.CentersofDiseaseControl.6)SafeandEffectiveIonizer.Circulatestrillionsofnegativeionstoneutralizefloatingpollutantsthroughouttheroom.AJournalofHygienestudyfoundnegativeionstoimproveefficiencyoffilterunits,andmultiplestudies(includingthosebytheU.S.Dept.ofAgriculture)havefoundionizerstobehighlyeffectiveagainstdust,bacteria,etc.Finally,theS5000sionizerisproventobesafe,producingvirtuallynoozonewhatsoever.HEPAFilterHEPA Filter: A high efficiency particulate air (HEPA) filter is a precision high volume air filter capable of cleaning air of all particles 0.3 micrometers in diameter or larger. HEPA filters work to clean air with microfibrous membrane materials. These Microfibersare able to cling to or block air particles that filter through the device in one of three ways.HEPA fiberglass filter media are comprised primarily of glass microfibers and are produced with a wet laid process similar to those used for the production of paper. Its an ideal raw material to produce air filters. Its efficiency ranges fr