The 2 air conditioners I have are 1 year old Tranes. They replaced 20 year old Tranes. One is 4 ton and the other a 5 ton. The old ones had electronic filters which seemed to work. The new ones had very expensive material filters which would require at least annual replacement. They were Merv 16 made by IQAir. No longer available. When searching for replacements, I found Filterbuy. The size was available and the price was extremely reasonable. Merv 13 should be fine for 2 people in a single family homeThe size I ordered was an exact replacement fit for the filters I had .
I have purchased a lot of filters. I ordered the filters for an apartment complex for 19 years. These filters were not the quality of filters I expected!
The filters from Filterbuy are of the same quality as the one they put in my new furnace I purchased a few months ago at a fraction of the cost. I decided to buy 6 at a time and saved even more. I'm set for a year. I love autoship, that way I don't have to worry about running out of filters.