Furnace Filters 16x25x4 Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Filtrete is the best-performing furnace filters 16x25x4 brand in July 2026, moving 35,000 units across 5 ASINs for 54.7% of Top 10 volume. Aprilaire follows with 13,000 units (20.3%), ahead of Amazon Basics on 8,000 units (12.5%).

With 4 brands splitting the Top 10 and 87.5% 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 $34.34 to $71.99, 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: B00NVF4U1G booked 3K units at $50.98, with ▲ 50.0% MoM change. On the growth side, B0DCGPY1YK leads positive momentum with ▲ 150.0% MoM growth on 500 units, with B00CJZ9136 close behind at ▲ 100.0% MoM on 2K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.