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2. Indoor air quality - Wikipedia

   en.wikipedia.org/wiki/Indoor_air_quality

   Indoor air quality (IAQ) is the air quality within buildings and structures. ... The EPA standard for ozone concentration is 0.07 ppm average over an 8-hour period.

3. No, You Don't Need to Clean Your Air Ducts Every Year ... - AOL

   www.aol.com/no-dont-clean-air-ducts-110500245.html

   To learn more, you can turn to the EPA 's indoor air pollution medical guide as a resource to help you identify possible air quality causes, along with potential solutions.

4. The air purifier you bought during the pandemic may still ...

   www.aol.com/air-purifier-bought-during-pandemic...

   Humans spend the vast majority of their time – about 90% – indoors, and the quality of indoor air is often many times worse than the air outdoors. But indoor air quality is not regulated in ...

5. Air quality index - Wikipedia

   en.wikipedia.org/wiki/Air_quality_index

   The most commonly used air quality index in the UK is the Daily Air Quality Index recommended by the Committee on the Medical Effects of Air Pollutants (COMEAP). [39] This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general ...

6. National Ambient Air Quality Standards - Wikipedia

   en.wikipedia.org/wiki/National_Ambient_Air...

   The Clean Air Act requires the EPA to set US National Ambient Air Quality Standards (NAAQS) for the six CAPs. [6] The NAAQS are health based and the EPA sets two types of standards: primary and secondary. The primary standards are designed to protect the health of 'sensitive' populations such as asthmatics, children, and the elderly.

7. Do Air Purifiers Actually Work? Here's What Experts Say - AOL

   www.aol.com/air-purifiers-actually-heres-experts...

   In fact, indoor air can hold levels of certain pollutants that are up to five times higher than found outdoors. Air purifiers can indeed neutralize some of the risks posed by indoor air pollution ...