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Benzene: A colorless volatile liquid hydrocarbon present in coal tar and petroleum, used in chemical synthesis. Its use as a solvent has been reduced because of its carcinogenic properties.

Air purifiers best for removing benzene:


Chemicals: a compound or substance that has been purified or prepared, especially artificially.

Air purifiers best for removing chemicals:


Cooking Odours: Some types of food leave behind noticeable and sometimes unpleasant trace odours.  Air purifiers can help to remove those smells.

Air purifiers best for removing cooking odours:


Dust:  Dust is a fine, dry powder consisting of tiny particles of earth or waste matter lying on the ground or on surfaces or carried in the air.

Air purifiers best for removing dust:

Dust mites

Dust mites:  Dust mites are microscopic organisms that feed off of house dust and the moisture in the air. They are one of the most common indoor allergens, and symptoms can be present year round. In addition to allergic rhinitis, dust mite allergy can also trigger asthma and flares of eczema. People with dust mite allergies often suffer the most inside their own homes or in other people’s homes. Oddly enough, their symptoms often worsen during or immediately after vacuuming, sweeping and dusting. The process of cleaning can stir up dust particles, making them easier to inhale.

Air purifiers best for removing dust mites:


Formaldehyde: Formaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products.

Air purifiers best for removing formaldehyde:


Microparticles: Microparticles are particles between 0.1 and 100 m in size.  Microparticles encountered in daily life include pollen, sand, dust, flour, and powdered sugar.

Air purifiers best for removing microparticles:


Particles:A minute portion of matter.  PM2.5 refers to atmospheric particulate matter (PM) that have a diameter of less than 2.5 micrometers, which is about 3% the diameter of a human hair. Commonly written as PM2.5, particles in this category are so small that they can only be detected with an electron microscope.

Air purifiers best for removing particles and particulate matter:

Pet-related odours

Pet-related odours: Odours related to kitty-litter boxes, cats, dogs and other indoor animals.

Air purifiers best for removing pet-related odours:


Pollen: Pollen is a fine to coarse powdery substance comprising pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).

Air purifiers best for removing pollen:

Tobacco and Cannabis Smoke

Tobacco and Cannabis Smoke:  

Tobacco smoke contains a number of toxicologically significant chemicals and groups of chemicals, including polycyclic aromatic hydrocarbons (benzopyrene), tobacco-specific nitrosamines (NNK, NNN), aldehydes (acrolein, formaldehyde), carbon monoxide, hydrogen cyanide, nitrogen oxides, benzene, toluene, phenols (phenol, cresol), aromatic amines (nicotine, ABP (4-Aminobiphenyl)), and harmala alkaloids. The radioactive element polonium-210 is also known to occur in tobacco smoke. The chemical composition of smoke depends on puff frequency, intensity, volume, and duration at different stages of cigarette consumption.

Cannabis smoking is the inhalation of smoke or vapors released by heating the flowers, leaves, or extracts of cannabis and releasing the main psychoactive chemical, Δ9-tetrahydrocannabinol (THC), which is absorbed into the bloodstream via the lungs.

Air purifiers best for removing tobacco and cannabis smoke:


Viruses: A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.

Air purifiers best for removing viruses:

Volatile Organic Compounds (VOCs)

Volatile Organic Compounds (VOCs): Volatile organic compounds (VOCs) are emitted as gases from certain solids or liquids.VOCs include a variety of chemicals, some of which may have short- and long-term adverse health effects. Concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors.

Air purifiers best for removing VOCs: