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[0] HEPA [1] Dander, fungi, mold, pollen, smoke [2] Synthetic filter can remove at least 99.97% of airborne particles 0.3 micrometers (µm) in diameter. [3] 
A Danish study found HEPA filters improve cardiovascular health.
Breathe Easier in Your Home: Air Filter Guide + 8 Simple Steps to Cleaner Indoor Air | Gaiam Life
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