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01

Environmental Protection Agency (EPA)

 

https://www.epa.gov/indoor-air-quality-iaq/introduction-indoor-air-quality

02

American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE)

 

.https://www.ashrae.org/technical-resources/bookstore/indoor-air-quality-guide

03

Consumer Product Safety Commission (CPSC)

 

https://www.cpsc.gov/Safety-Education/Safety-Guides/Home/The-Inside-Story-A-Guide-to-Indoor-Air-Quality

04

National Air Filtration Association (NAFA)

 

https://www.nafahq.org/understanding-merv-nafa-users-guide-to-ansi-ashrae-52-2/