I started buying a mid priced filter for my furnace. At changing time I was always shocked at how much dirt was collected. I am now buying top of the line filters and feel they are worth the investment.
I have used Filtrete filters for years and they are excellent. They are very effective. My wife and I have allergies and we believe that these filters significantly reduce the allergens in our home.
We have used and recommended Filtrete air filters to everyone who asks us what kind of filters we use. We have tried other brands and definitely notice that Filtrete filters are the best and very cost effective! Great job on a great product!