Filtrete Micro Allergen Defense Air Filter, Delivers Cleaner Air Throughout Your Home, Uncompromised Airflow, 1000, 12 x 12 x 1, 6-Pack

, - 3-month pleated 1 in. home air filters for your furnace, air conditioner or system Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through particles such as lint, pollen, dust, pet dander, smoke and smog 1000 has a rating of 11 The higher the , the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it : 1000 available in 4in. , 4in. slim fit and 5in. thick air filters of your heating & cooling system or system, change your home air filter at least every 90 days for 1 in. filters, and at least every 12 months for 4 in. and 5 in. filters