I believe they work. Have the 1st of the pack we purchased in my handler now. I can't speak for the way they are supposed to remove odors, mold, dander, etc..as they say they do, but I need to replace my filters once every month as required by my property management company so I got these. With the price we paid its about $10 a month. I am good with that!

Great filters for a great price, best deal you can get in furnace filters!

Great filters at a good price.

Good price as I use these filters often

Have seen much improvement in house dust & air feels cleaner

I love these air filters and the fact that Sam's Club always has them in 14x20 size is a bonus.

I like this better than the cheaper ones they work a lot better

Great filters for that price

They work well and last 3 months generally

Very easy to install, great to trap and filter dust and keepbdust down.