Double deck of outstanding filter media to ensure doubled superior particle removal performance. Filters 99.97% 0.3µm particles, including common allergens, dust, pollution, bacteria & some virus. Filters ultra fine particles as small as 20nm.
Philips NanoProtect 6000 Series HEPA Filter FY6172-30
Blueair 600 Series Dual Protection Filter 103770
Yet to be reviewed

