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The cost depends on the extent of quality and consistency you expect

But most of these machines have no ability to test newer products like e-cigarettes and vapes, posing a challenge to the public health agencies evaluating whether or not a product is safe enough to enter the market, said Marielle Brinkman, senior research scientist in the Division of Epidemiology at The Ohio State University College of Public Health

presented to the Federal Interagency Committee on Indoor Air Quality 2/14/2023 Emerging Approaches to Cleaner Indoor Air During Wildfires Presented to the California Air Pollution Control Officers Association 4/21/2021 References Usage and impact of a do-it-yourself air cleaner on residential PM2.5 in a smoke-impacted community (2024) Field measurements of PM2.5 infiltration factor and portable air cleaner effectiveness during wildfire episodes in US residences (2021) Impact of wildfire smoke events on indoor air quality and evaluation of a low-cost filtration method (2021) National Collaborating Centre for Environmental Health, Do-it-yourself (DIY) air cleaners: Evidence on effectiveness and considerations for safe operations

Retail prices range from $15$20 per pack, while some online listings show prices around $5 per pack.