I put the new filter in the day after I got it. It seems to be doing a fantastic job of filtering the air in my home. I went from MERV 8 to MERV 13 and so far, I'm satisfied.
I am please these are American made products. The quality and providing jobs are the contributing factors of my purchase. I would rather the sizes be exact to the labeled package.
I purchased these 13 merve rated filters in hopes of eliminating the high pitch whistling sound when the AC is running. However, the filters did not stop the problem