Bought these filters for four years now. My wife is a teacher and requested some type of filtration system for her classroom Merv 13 filters are said to be good enough to filter Covid viruses and other small viruses. I built her a four filter box fan filtration system. Covid scare is over, but my wife noticed how many less colds her students had and has requested me to make a new one for her every year since, good quality filter had a reasonable price
And before you know it, your filters are at your house. Seriously I needed some strange sized filters and this was the easiest and most Cost-effective way to do it. I recommend them.
These filters are exactly what I need. I buy the higher MERV air filters because I have allergies and need all pollen and pet dandruff filtered and my wife likes to burn candles, so it is nice to have the soot and particles removed as well. I will definitely be back for a resupply.