Much better then most common hardware store filters
582228
Great filters! Much better then most common hardware store filters.

This might not be the best filter 3M makes but for me it is the best mixture of filter level for an affordable price. It works great in my unit and does not impede performance like reported with more restrictive filters. Filters have arrows on them to help with proper installation and also has a spot to write the date that you install it on them. I have used them for up to three months as advertised and they do work. But I usually change them in one to two months for best performance especially during high allergen months.

Ordering them on Amazon is convenient since you do not have to hunt down your proper size at the store.
2919364
Fit perfectly and they seem to be a superior filter compared to many others that I have tried.
3758395
These filters are great! They last way longer than a regular filter. (they say 6 months, but after 12 months mine barely looked used) They filter more particles than a regular filter. Easy enough to install. Price isn't nearly as high as I expected.
856184
I have been using these KN filter is on my Buell XB12  for more than 10 years now.  There may be cheaper filters out there, but  I haven't found any that are of better quality.  The main feature for me is the not welded onto the end that has been pre-drilled for a safety wire.  Plus the nut makes it easy to remove the filter with just a wrench.
4588625
Well worth the price and is a very nice option when compared to standard filters that cost twice the price.  Little cumbersome to clean but overall well worth the money.
311299
I was tired of overpaying for these filters from Home Depot, Wall Mart, Ext. I've been using these generic filters for two years now with zero issues and frankly the water with with these generic filters tastes and looks just as good as Samsung filters. So I highley recommend these filters to anyone interested in saving a buck and getting a great filter
4670781
Really like these filters - and it is so much easier to order than shopping around my local stores for the right size.
2954696
We use these filters in our whole house filter.  It is shocking how much debris and gunk is in the filter when it is changed.  We have used these filters for years and will continue to do so.
1231374
Good quality at a reasonable price. Beats going to the local hardware store and finding overpriced filters or no size that I need.
4555337
Just changed out the filter in my furnace that was 18 month old. These things collect and hold much more material than a 1" filter ever could. Also, these filters are electrostaticly charged, making them attract dust better than most pleated or fiberglass filters. Although they're a pricey replacement, amazon is still cheaper than my local hardware store.
1030638
I have been using this filter material for about 2 months now and it is a big improvement from pet store brand filter material. I have less of a problem with bacteria growing in my filters tubes.
247881
This is a good way to buy filters in large quantity.  Less trips to the store and less money used.
1081182
Good filters at a great price. My bro works in HVAC and says get the cheapest decent filters you can. The super-duper HEPA rated filters reduce forced airflow and can cause the motor on your blower to burn out more quickly. Don't know if that's true or not, but these are well priced and give you a year's worth of filters if you only change once every 2 months. I also have a hard time finding this size locally, so it's worth getting them sent from Amazon.
2130654
Seems like better quality than many I've purchased at big box stores.  Also haveing these delivered is a great reminder that it's time to change the filter!
2097210
This filter is way better than the Home Depot brand. Our water comes out faster with this one. Super happy!
1489817
Same filters that cost twice as much at Lowes and The Home Depot. Some people claimed they had a bad taste but we did not have that at all. I ran a couple of gallons of water through each one at initial start up and it was as good or better than the other brands. Now I spent 25 years in Water Quality and environmental/civil engineering and can attest that you are totally wasting your money buying from a retail store. They are the same micron size and content as the expensive ones. Your money your choice.
3038436
fits my 4.5 gal shop vac well and filters well