Best filters ever. Having COPD like I do and recovering from lung cancer, the clean air the MERV 13's gives me, is a peace of mind. You can't get in any other filter. I can tell the difference. Lastly they are perfect fits.
I have never had a filter that fits perfectly inside the HVAC system. This one did. I am impressed with the quality of the filter as well. The filtration is excellent, my family could tell the difference in the air. Thanks so much.