Here are the differences between the Nordic Pure I unpacked and the Honeywell model it replaces: (1) It is 7/8" less thick; (2) It has several fewer pleats, meaning even less surface area; (3) It is .25" smaller in length and breadth, making for a poor fit in the HVAC unit; (4) The filter is packed in a way that looks haphazard, which may be meaningless -- or perhaps not. Granted that it's only half the price, but I'm guessing it has >30% less filtration medium, and the poor fit does not bode well, and who knows about the quality of the medium? Henceforth I'm sticking with the name brands.