20x24x1 Air Filter Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Filtrete is the best-performing 20x24x1 air filter brand in July 2026, moving 28,000 units across 6 ASINs for 51.9% of Top 10 volume. Amazon Basics follows with 10,000 units (18.5%), ahead of Aerostar on 10,000 units (18.5%).

With 5 brands splitting the Top 10 and 88.9% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $31.89 to $42.52, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B00CJZ8P5Q booked 3K units at $39.96, with ▲ 50.0% MoM change. On the growth side, B00TUDHMB8 leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B00TUDHSM6 close behind at ▲ 100.0% MoM on 1K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.