Filtrete 20x25x1, AC Furnace Air Filter, MPR 1900, Healthy Living Ultimate Allergen, 2-Pack (exact dimensions 19.69 x 24.69 x 0.78)

When I bought my house I learned of the importance of changing your furnace filter (if you have a furnace). After trying some super-cheap filters, and suffering from indoor allergies (we have cats, a small suburban farm, kids, lots of dust-makers), I tried a lower-grade Filtrete filter. My results were so noticeable, I upgraded, and now, have upgraded again. While these filters can only do so much for your indoor air (the air that actually circulates through your furnace), it really does a great job. Im always simultaneously impressed and disgusted by how dirty they are after I pull them out. They do indicate that these filters are good for 3 months-- but I normally replace them every TWO months (finding them quite dirty) to enhance my air quality further and hopefully extend the life of my furnace.

THESE FILTERS MAKE A WORLD OF DIFFERENCE WITH INTERNAL AIR QUALITY.

Good value and can already tell difference in air quality

Not sure how to test to make sure they are actually MPR 1900 rated, but they seem to work just fine for what they are. 4 stars because they are a bit pricey for just a filter.

I have learned that best A/C - furnace filters are those with the most surface area. This can be easily measured by counting the number of pleats. Also, it is important to keep your air ducts clean which also is a plus. When I change filters every 3 months I marvel at the amount of residue that was retained that I did not have to breathe.

Works great!

Works well as a cheap filter on my 20 inch box fan.

Work great

Great price and delivered to my door! Love it!

Easy purchase, arrived as expected