I have used these filters for several years and don't have to change them out as often as other brands. Although it states they last 3 mos, I usually swtich them around 2 mos in summer. I don't have much along allergys so I can't speak to it's effectiveness or maybe that's why I don't have allergys :-)

Use this type all the time. They work really good.

I was so glad to see that Sam's had the size filter I need.

Glad to get a good supply.

Good price, then another prices

So far superior to cheaper brands

These are very good filters

Very good filters for allergens at a great price

dependable for quality air conditioning

great prize and good product will buy again.