Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
It checks today's price at every store, compares the alternatives and answers in about a minute.
This is a four-pack of 3M 20x16x1 furnace filters, sized for return grilles and air handlers that take a 20-inch by 16-inch, 1-inch-thick filter. The set covers a full year of changes for most homes that swap filters every three months. At $131.96 at Wayfair as of November 7, 2026, it is the only new price listed, so there is no cheaper store to compare against right now.
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Store links may earn us a commission. Some prices via Klarna.
Lowest price we've seen: $45.64 on Nov 8 at Walmart. Tracked across 2 stores since Nov 8.
Ratings are very high, 5 out of 5 from about 2,200 ratings, which points to buyers getting the size and fit they expected. Most feedback on this type of filter centers on fit in the slot and how quickly it loads with dust.
