18x20x1 Furnace AC Filter MERV 11 Allergy 6-Pack

For the price of these filters they work perfectly. I change out my filter almost monthly, it keeps the dust down and I burn a candle after dinner. They do the job.

JUST AS ADVERTIZED

UPDATE: FYI! Watch your price on these... When I originally bought them in January 2017, they were $37.92 plus tax for a box of 6, but when I went to re-order them in August 2018, the price was jacked up to $50 and change before tax. Sooo... This year, I purchased "Aerostar Pleated Air Filter, MERV 13, 16x25x1, Pack of 6, Made in the USA" @ $37.99 instead, which--as you can see by the description--is an upgraded filter for the same price as I paid for these last year (MERV 13 vs. MERV 11).Before I purchased these, I did a lot of research as to what the different rating systems mean (MERV vs. MPR vs. DPR), who developed them, and how they compare to each other. Google it if you're curious. Very helpful. Armed with this knowledge, I purchased these filters and I'm happy with them. A few notes about the concerns of some of the other reviewers now that I've purchased these myself...1) "No markings on the filter--is this what I paid for?" - The MERV rating is very easy to miss, but it is there, so I've included a picture. (It's on the filter material, not on the frame.) Also, the brand and size can be found on the outside of the shipping box, which also doubles as a storage box for the filters, and features a label on the side where you can record the dates you've changed your filters. I've included pictures of all this, as well.My assumption about the lack of fancy packaging, color print, and copious labeling is that this is part of the reason these filters are offered at such an affordable price. I'll take it, especially since these are made in the USA. (Nobody sees the filter once it goes inside the unit, so I don't really care about the packaging. I just care that it does the job.)2) "I would've liked more folds." - The filters I received have a comparable number of folds to my old, name-brand filters. While I was looking at this, I noticed that the frame of these filters is actually sturdier than my name-brand filters on the non-airflow side, so I've also included pictures of both sides of each filter for comparison.3) "Annoying whistle." - I have not experienced this with the filters I received. I am happy with these filters, and will be purchasing again when needed.

I ordered 6 pack and 1 of the 5 arrived damaged & unusable .The shipping box barely held 6 squeezed in.All prior orders ok as ordered multiple times.The $$ gone up dramatically since 1st of 5 orders.They work

Keeps the house low on allergens and dust. You will have to change more frequently than less quality filters though. Worth the cost indeed.

this product make my expectation.

Excellent filters - the cost to performance ratio on these is basically unheard of. No frills, no brand names, just top notch performance. Filters are put into our units and closed up to collect all the nasty stuff we don’t want blown around our house. As others have said, fancy packaging means nothing.One word of caution: you probably already know that these filters have a high MERV rating of 11. This is great to grab microparticles from the air and will undoubtedly help allergy sufferers. However, a higher MERV rating means more resistance for airflow. Many furnace systems are not capable of generating the air flow required to maintain proper operating efficiency with this resistance.To illustrate, my furnace runs wonderfully with a new filter. The issue is that it begins “short cycling” after approximately 3-4 weeks of these filters being in place. I realize many change out filters this often (as do I), but if airflow is restricted enough to cause short cycling when the time to change the filter out, damage to the furnace is already being done. Clearly this is no fault of the filters, it’s simply a symptom of a blower that’s not up to the task on my unit. The solution, as much as my allergies hate me for it, is to buy filters with a lower MERV rating. It is what it is. Just a word of caution to check your furnace’s specs to make sure it can handle these filters, and if your unit is aging, perhaps consider a filter with a lower MERV rating.

We live in a dusty/sandy area and these filters work great at keeping us breathing good quality air. I can always tell when it is time to change it as I get sniffles due to having allergies.