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Pleated filters outperform flat fiberglass on every metric that matters: Filtration efficiency Longevity between changes System protection Indoor air quality It's what we use in our own homes

I don't really feel like being up all night on a weekday (5 am comes too quickly)

Exclusion criteria included pregnancy or an intention to become pregnant during the study, oligomenorrhea, irregular menstrual cycles, and antibiotics, anti-viral and anti-fungal medication in the previous two weeks before inclusion in the study or during the study period

Tobacco smoke contains more than 7,000 chemicals, 1 of which hundreds are toxic and about 70 can cause cancer