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Intro
Research on the health impacts of particulate matter (PM)
Why I started getting skeptical about HEPA Air Purifiers
Clean Air Delivery Rate (CADR): a better way to measure air purifier performance
How can HEPA air purifiers capture virtually all particles, but still leave the air dirty?
What are the tradeoffs of the high efficiency of HEPA?
Most HEPA brands don't even report CADR
Some HEPA brand DO report CADR. Can we trust that number?
RESEARCH STUDIES showing that DIY air purifiers (CR boxes) with MERV-13 HVAC filters are better than HEPA
Can HVAC filters capture ultrafine particles?
Why HEPA efficiency may not be as high as 99.97
Can CR boxes protect us from viral transmission?
How CLEAN AIR KITS makes a quieter air purifier (PC fans)
How do clean air kits compare to CR boxes and HEPAs?
How can clean air kits be safer than HEPAs with comparable CADR?
WHICH AIR PURIFIER SHOULD YOU BUY?
BEFORE BUYING: how to size an air purifier to a room
Wayne's air purifier layout strategy for viral transmission (THE EXHALARON)
Are HEPA filters useful in other contexts?
Are activated carbon filters and prefilters necessary?
CALL TO ACTION