Nordic Pure 20x20x1 MERV 14 Pleated AC Furnace Air Filters 12 Pack

they fit well as showed in the description

The effect of the charcoal filtration over a regular non-charcoal filter is minor - yes, I still have cooking smells in my home, for instance. But even though the effect is minor, with my super sensitive sniffer I appreciate even the minor assistance that the charcoal provides and I'm now spoiled and don't want any other filter.

I love these filters, they are my go to. They are great quality and keep a lot of junk out of my air system.

great!

So the filters worked great. The price is decent compared to big-box stores. I purchased the 6-pack of MERV 12's. They get shipped in a really thick-carboard box, very sturdy so they don't get crushed in shipping I presume. I was using MERV 10 filters in a different brand, and swapped to Nordic Pure in a MERV 12. Measurements worked out to be 19 9/16 x 19 9/16 x 29/32. My old filters we basically the same. They slide in fine (under mount to HVAC unit) and don't rattle as some folks have complained. The material is slightly heavier (and hence the whole filter feels slightly heavier) than my previous one. I counted the pleats, there are 27 (the MERV 10 had 21 pleats). My HVAC unit is only 4 years old, and did not struggle or have flow-restrictions when put into place. I presume the higher MERV is working, as my dust level in the house is a bit lighter than it was previously. As for those folks that complain about the size, if you look up size standards, this is the standard size. I looked up Filtrete filters, since other reviewers seem to think those are bigger, and found those to be 19.69 x 19.69 x 0.81. No difference. As for stating that this will break your air flow, I would suggest it is time to replace your unit (that on a reviewer who bought a lowly 8 MERV). Finally, saying that these don't work as well because they are not dark grey after 45 days of use makes no sense. These are not full of holes or anything (that would be obvious). I'm not sure where that came from... So yes, I would recommend these filters. They work as they are supposed-to. No complaints here.