Air purifier
Air Purifier
An Air Purifier (pronunciation: /ɛər pjuːˈrɪfaɪər/) is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke.
Etymology
The term "Air Purifier" is derived from the English words "air" (pronunciation: /ɛər/), which is the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen, and "purifier" (pronunciation: /ˈpjʊərɪfaɪər/), which means a device or substance that removes impurities or unwanted elements from something.
Types of Air Purifiers
There are several types of air purifiers, including:
- HEPA Filter Air Purifiers: These use a high-efficiency particulate air (HEPA) filter that can remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns.
- Activated Carbon Air Purifiers: These use a bed of activated carbon to remove organic and chemicals from the air.
- UV Air Purifiers: These use ultraviolet light to kill bacteria and viruses.
- Ionic Air Purifiers: These release charged ions into the air that attach to harmful particles, which are then collected on a plate in the purifier.
Related Terms
- Air Quality: The condition of the air within a specific area or environment.
- Allergen: A substance that causes an allergic reaction.
- Asthma: A condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe.
- Second-hand Smoke: Smoke inhaled involuntarily from tobacco being smoked by others.
External links
- Medical encyclopedia article on Air purifier
- Wikipedia's article - Air purifier
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