Living in a restored 90-year-old farmhouse, I wanted best filter possible on my new HVAC. After trying several MPR grades of Filtrete – I've settled on the 1900 Series, changed every sixty days. Filtrete offers excellent filtration with robust airflow, and keeps allergens and dust at minimum. In my experience for the past two years – nothing beats Filtrete.
If only installed the filter a month ago, therefore the 4 star rating. Once it's been in for 6 months I'll see how it performed compared to the others I've used.