Since we spend 90% of our time indoors and indoor air can be dirtier than outdoor are when there isn’t a specific environmental threat — like a forest fire — nearby, it’s worth considering one for your home. (If you do, ensure it’s safe and certified in your area to not flood your living space with ozone, which is unhealthy in high concentrations. California’s Certifications are here, for example. While you’re checking Certifications, ensure that whatever unit you’re considering is CERTIFIED allergy-friendly.)
