Air Pu­ri­fiers

Consumer Voice - - Smart Consumer Guide -

Air pu­ri­fiers, also called air clean­ers, can help im­prove the qual­ity of the air in one’s home by re­mov­ing dust, pet dan­der, mould, or other ir­ri­tants. Air clean­ers range from por­ta­ble to whole-house mod­els .Whole-house air clean­ers of­fer the great­est ef­fi­ciency but typ­i­cally cost more than other op­tions and re­quire pro­fes­sional in­stal­la­tion. This sur­vey is about room air pu­ri­fiers and the op­tions avail­able in this cat­e­gory.

Air-Pu­rifi­ca­tion Tech­nolo­gies

Ev­ery air-pu­rifi­ca­tion tech­nol­ogy has its strengths and weak­nesses. An air pu­ri­fier that of­fers mul­ti­ple tech­nolo­gies is gen­er­ally best.

Ac­ti­vated Car­bon Air Fil­ter

Ac­ti­vated car­bon air fil­ters con­sist of a vast sys­tem of pores of molec­u­lar size. Th­ese pores are highly ad­sor­bent, form­ing a strong chem­i­cal bond/at­trac­tion to odor­ous, gaseous, and liq­uid con­tam­i­nates.

Strengths: The most ab­sorbent fil­ter avail­able, mak­ing it highly ef­fec­tive in cap­tur­ing chem­i­cal fumes, gases, cig­a­rette smoke, and odours

Does not re­lease cap­tured con­tam­i­nates back into the air

Weak­nesses: Does not ef­fec­tively re­move dust and other al­ler­gens. Does not ef­fec­tively cap­ture micro­organ­isms Has a dif­fi­cult time re­mov­ing con­tam­i­nates from across the room, since they must travel through the fil­ter

HEPA Air Fil­tra­tion

High-ef­fi­ciency par­tic­u­late ar­restance (HEPA), also some­times called high-ef­fi­ciency par­tic­u­late ar­rest­ing or high-ef­fi­ciency par­tic­u­late air, is a type of air fil­ter. HEPA air fil­ters are the most ef­fi­cient type of air fil­ter avail­able. They are 99.97 per cent ef­fec­tive at re­mov­ing par­ti­cles as small as 0.3 mi­crons.

Strengths: Re­moval of dust, pol­lens, mould spores, dust mites, and other al­ler­gens

Re­moval of many bac­te­ria

Solid par­ti­cles cap­tured are not re­leased into the air again

Weak­nesses: Dif­fi­cult time re­mov­ing air­borne par­ti­cles from across the room, since they must be drawn through the fil­ter

Does not re­move chem­i­cal fumes, gases, cig­a­rette smoke, or odours

Does not cap­ture ul­tra-fine par­ti­cles, viruses, or germs

Micro­organ­isms cap­tured in fil­ter can breed and/ or re­pro­duce, re­sult­ing in in­creased mi­croor­gan­ism pop­u­la­tions

Ger­mi­ci­dal UV Lamp

Ul­travi­o­let (UV) lamps ef­fec­tively de­stroy micro­organ­isms that pass by the bulb, in­clud­ing germs, viruses, bac­te­ria, and fungi (such as mould). Strengths: Abil­ity to de­stroy micro­organ­isms Helps pre­vent ill­ness and dis­ease Weak­nesses: No ef­fect on par­tic­u­late, in­clud­ing most al­ler­gens

No ef­fect on chem­i­cal fumes, gases, or cig­a­rette smoke

No af­fect on odours, un­less de­signed to pro­duce ozone, which may not be de­sired un­der all cir­cum­stances. Some UV lamps are de­signed not to pro­duce ozone

Air Ioniser

An air ioniser creates neg­a­tive ions that change the po­lar­ity of air­borne par­ti­cles, caus­ing them to mag­net­i­cally at­tract to­gether. As a re­sult, they be­come too large to re­main air­borne, and fall out of the air that you breathe in. The most ef­fec­tive ionis­ers use a stain­less steel ‘needle­point’ to pro­duce neg­a­tive ions.

Strengths: Re­moval of par­ti­cles from the air, in­clud­ing ul­tra-fine par­ti­cles as small as 0.01 mi­crons

Neu­tral­i­sa­tion of viruses, bac­te­ria, cig­a­rette smoke, and chem­i­cal fumes

Can cir­cu­late through­out the room to re­move air­borne par­ti­cles

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