Installed first filter two weeks ago. Looking to see a reductionOf sneezes and better breathing for my wife. Don't expect drastic change but hoping for overall improvement in home air quality. Too soon to give you an answer.
I have seen a big difference in air quality in the house as the air doesnt look like a smoke cloud when the sun shines through the window. But unfortunately the air ducts are really dirty. This filter has made a difference and has not affected the furnace functionality.
This is by far the best filter ever..great quality and prices. I've had to replace my filters twice a year. Love that this filter keeps dust at a minimal.