I decided, what the heck. All I have to do is sit here at the computer & order filters. I checked what Merv number I was currently using and went up a notch, wow! The sound quality of the entire system is different. The air quality in my home is soothing. I don't have dust constantly. I sleep better, more comfortable. This is a quality of life issue folks. Do it, change and you will be so comfortable. P.S. I have two cats. My visitors aren't sneezing anymore!
The filters I received were sturdy and fit perfectly in my heating and air conditioning unit. They are doing a great job of filtering the air. There is less dust in furniture as they are cleaning the air well. Great filters.
I have an older electronic filter in my system that doesn't work. I needed a filter, but the size of the box is completely irregular. I was able to measure the box, order 1 filter, try it out (didn't fit), order a second filter with adjusted size, and it fits! So now I know what size I need and I can save by ordering a case of them!
[This review was collected as part of a promotion.] Not happy this was made from 2 filters with a 4" strip to fasten filters together. This makes the free area of the filter less.