Concerns covered: Absorbing wildfire smoke and secondhand smoke, harmful chemicals and VOCs, cooking and common household odors + capturing allergens, dust, mold(B7-Fresh). Trust H13 True HEPA: 3-stage H13 True HEPA filtration captures 99.9% of particles as small as 0.1 microns. Extra long-lasting 12 to 15 -month life span.