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 porice and love the multipak

Great filters at a good price.

Have seen much improvement in house dust & air feels cleaner

great filters at good price

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

Really like these filters

These seem to be good filters and the price was good.

These 4pks are a great value!