Air quality. That why you trust Aprilaire to keep your home environment secure for you and your family. This true Aprilaire 210 Air Filter Replacement is MERV 11. That it makes the air in your home sweet and anicteric so your family can breathe well-fixed. It 's to prevent 92 % of particles between 3.0 and 10.0 microns from passing through your home 's heating and cooling system. That dust, pollen, and mold spores, which can irritate allergies and worsen asthma symptoms. flora air filter replacements are a slap-up to keep your home and family protected. Aprilaire it well-fixed to know what you 're breathing.