16x25x1 MERV 11 Pleated Furnace Air Filter - Case of 12 | High Efficiency HVAC Filters for Home & Office | Made in Canada by FurnaceFilters.Ca | Perfect for Allergies, Dust & Pet Dander Control

I have been buying this brand of filter for over a decade now and they work well. They provide excellent air flow for my furnace in the summer so that my A/C evaporator coil in my furnace doesn't freeze up, but while at the same time doing an excellent job at removing dust and other allergens from the air in my home. I have lung problems and need a high quality furnace filter to keep the air in my home clean using my furnace on circulation mode so it's always filtering the air in my home through this filter even when the A/C isn't actively cooling my home. There are other brands that filter at the same as these but charge far more. I have done my own testing and found these work just as well at a fraction of the cost. I will continue to buy this filter as long as it is made because my lungs have voted "YES" on it and my wallet has too thanks to their great pricing in comparison to other brands that you are heavily paying "marketing" costs for but don't do any better of a job because their own ratings are the same thing as a Merve 11 when compared. You know the brand. It has a 3 and an M in it. HA!