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2. Air purifier - Wikipedia

   en.wikipedia.org/wiki/Air_purifier

   Air purifier. An air purifier or air cleaner 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 .

3. Corsi–Rosenthal Box - Wikipedia

   en.wikipedia.org/wiki/Corsi–Rosenthal_Box

   Corsi–Rosenthal Box. An example of a homemade unit. The Corsi–Rosenthal Box, also known as a Comparetto Cube, [ 1] is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four [ 2] or five [ 3][ 4] HVAC particulate air filters that form a cube and a box fan to draw air through the filters.

4. Air ioniser - Wikipedia

   en.wikipedia.org/wiki/Air_ioniser

   An air ioniser (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to ionise (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.

6. 43 Really Odd Jobs That Actually Exist (And Actually Pay ...

   www.aol.com/finance/43-really-odd-jobs-actually...

   1. Snake Milker. Pay: $2,800 per month This isn't actually milking, but getting venom from the snake. It's a job that requires nerves of steel and an ability to move quickly should a snake decide ...

7. NASA Clean Air Study - Wikipedia

   en.wikipedia.org/wiki/NASA_Clean_Air_Study

   The NASA Clean Air Study was a project led by the National Aeronautics and Space Administration ( NASA) in association with the Associated Landscape Contractors of America (ALCA) in 1989, to research ways to clean the air in sealed environments such as space stations. Its results suggested that, in addition to absorbing carbon dioxide and ...