Review on 🌬️ Filtrete Allergen Delivery Assurance by Jason Porter

I have been using these filters for 3 years and buy them in bulk from Amazon. I change the filter every three months as recommended and it catches a lot of dust, dirt etc (they turn white and come out grey). I would not recommend leaving this filter on for more than 3 months as it is only 1 inch thick and will no longer trap dust or allergens. I have the ability to fit a 4" filter in my return line, but found a few years ago that it slowed the flow of air into my ducts significantly. Since changing the 1" filter and giving up after three months, my airflow has improved without affecting my breathing.