18x24x1 Air Filter Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
18x24x1 Air Filter sales on Amazon US totaled 40,450 units in July 2026 (▲ 24.5% vs. the prior month), generating an estimated $1,332,132 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 81.6% of unit volume and 73.1% of revenue, while a typical listing is priced at $49.19. The keyword itself pulled 18,499 Amazon queries over the same period (▼ 2.6% MoM).
Zooming out to the 12-month window ending July 2026, the 18x24x1 air filter Top 50 moved 321,450 units and $10,641,684 in cumulative sales — an average of 26,788 units and $886,807 per month. Monthly throughput topped out at 40,450 units in July 2026 and dipped to 13,250 in May 2026, leaving the latest reading 29.9% higher than August 2025.
18x24x1 Air Filter Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
40.5K
▲ 24.5% MoM
Monthly Revenue 2026/07
$1.3M
▲ 22.8% MoM
Top 10 Market Share 2026/07
81.6%
18x24x1 Air Filter Market Share & Sales Concentration on Amazon US — July 2026
The most-sold 18x24x1 air filter listing on Amazon US in July 2026 is ASIN B004Q6EZYQ (Brand: Filtrete), which sold 10,000 units at $29.62 apiece — equal to 24.7% of every unit tracked in this report and 25% ahead of the No. 2 listing.
The Top 10 ASINs account for 33,000 units and $973,960 in July 2026 — 81.6% of unit volume and 73.1% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for '18x24x1 Air Filter' on Amazon
July 2026
Is 81.6% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B004Q6EZYQ
Filtrete 20x20x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 19.68 x 19.68 x 0.81 in)
10K
▲ 42.9%vs. prior month
$296.2K
latest month
12-month trend
B0DQPBQW48
Amazon Basics MERV 5 AC Furnace Air Filter, 16x25x1 inches, 6-Pack (Actual size: 15.75" x 24.75" x 0.75")
8K
▲ 33.3%vs. prior month
$224.3K
latest month
12-month trend
B07FNW9WZ1
Filtrete 18x24x1 Air Filter MERV 5, 6-Pack AC Furnace HVAC Filters for Home, MPR 300 Basic Dust Defense, Pleated Electrostatic Removes Lint & Dust (Actual Size 17.81x23.81x0.81 in)
3K
▼ 25.0%vs. prior month
$85.5K
latest month
12-month trend
B00CJZ8EKW
Filterbuy 18x24x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.38 x 23.38 x 0.75)
2K
▲ 100.0%vs. prior month
$82.6K
latest month
12-month trend
B00TUDHMB8
Filtrete 20x24x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 19.68 x 23.68 x 0.81 in)
2K
▲ 100.0%vs. prior month
$50.8K
latest month
12-month trend
B01CSWQ8EE
Aerostar Air Filter 18x20x1 MERV 8 AC Filter, HVAC, Furnace Filter, 6 Pack | ACTUAL SIZE (17.50 x 19.50 x 0.75) AC Filter, HVAC, Furnace Filter Captures Dust, Lint & Pollen MERV 8 (MPR 600 )
2K
▲ 100.0%vs. prior month
$64.5K
latest month
12-month trend
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Best 18x24x1 Air Filter Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Filtrete is the best-performing 18x24x1 air filter brand in July 2026, moving 20,000 units across 6 ASINs for 60.6% of Top 10 volume. Amazon Basics follows with 8,000 units (24.2%), ahead of Aerostar on 3,000 units (9.1%).
With 4 brands splitting the Top 10 and 93.9% 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 $27.68 to $36.66, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Filtrete
6 ASINs in Top 10
60.6%
Units
20K
Revenue
$563.2K
Avg. price
$27.94
B004Q6EZYQ
$29.62·★4.8·58.2K revsFiltrete 20x20x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 19.68 x 19.68 x 0.81 in)
Units sold10KB07FNW9WZ1
$27.96·★4.7·161K revsFiltrete 18x24x1 Air Filter MERV 5, 6-Pack AC Furnace HVAC Filters for Home, MPR 300 Basic Dust Defense, Pleated Electrostatic Removes Lint & Dust (Actual Size 17.81x23.81x0.81 in)
Units sold3KB00TUDHMB8
$33.35·★4.8·58.2K revsFiltrete 20x24x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 19.68 x 23.68 x 0.81 in)
Units sold2KB07CTPTG7Z
$22.46·★4.8·58.2K revsFiltrete 18x24x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 17.68 x 23.68 x 0.81 in)
Units sold2KB07FNQRDNK
$27.96·★4.7·161K revsFiltrete 12x12x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters
Units sold2KB00TUDHVIW
$26.28·★4.8·33.2K revsFiltrete 18x24x1 Air Filter, MERV 12, MPR 1500, 2 HVAC Filters | Allergens, Bacteria & Viruses, 3-Month AC/Furnace Filters, Cleaner Air, Reliable Airflow, (Act. Size 17.81x23.81x0.78 in)
Units sold1K
Amazon Basics
1 ASIN in Top 10
24.2%
Units
8K
Revenue
$224.3K
Avg. price
$27.68
B0DQPBQW48
$27.68·★4.5·1.3K revsAmazon Basics MERV 5 AC Furnace Air Filter, 16x25x1 inches, 6-Pack (Actual size: 15.75" x 24.75" x 0.75")
Units sold8K
Aerostar
2 ASINs in Top 10
9.1%
Units
3K
Revenue
$103.9K
Avg. price
$36.66
B01CSWQ8EE
$33.96·★4.7·2.1K revsAerostar Air Filter 18x20x1 MERV 8 AC Filter, HVAC, Furnace Filter, 6 Pack | ACTUAL SIZE (17.50 x 19.50 x 0.75) AC Filter, HVAC, Furnace Filter Captures Dust, Lint & Pollen MERV 8 (MPR 600 )
Units sold2KB01CR9JVF6
$39.37·★4.7·5.5K revsAerostar Air Filter 18x20x1 MERV 11 AC Filter, HVAC, Furnace Filter, 6 Pack | ACTUAL SIZE (17.50 x 19.50 x 0.75) AC Filter, Furnace Filter, Dust, Pet Dander, Smoke & Allergies MERV 11 (MPR 1200)
Units sold1K
Trending 18x24x1 Air Filter Products — Growth Leaders & New Top 10 Entrants
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: B00TUDHVIW booked 1K units at $26.28, with ▲ 100.0% MoM change. On the growth side, B07FNW3PV6 leads positive momentum with ▲ 300.0% MoM growth on 200 units, with B0D96SVNZS close behind at ▲ 200.0% MoM on 300 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.
B00TUDHVIW
Filtrete 18x24x1 Air Filter, MERV 12, MPR 1500, 2 HVAC Filters | Allergens, Bacteria & Viruses, 3-Month AC/Furnace Filters, Cleaner Air, Reliable Airflow, (Act. Size 17.81x23.81x0.78 in)
Price
$26.28
Rating
4.8
Reviews
33.2K
Latest month sales
B07FNW3PV6
Filtrete 18x24x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 6 HVAC Filters (Actual Size 17.68 x 23.68 x 0.81 in)
Price
$74.35
Rating
4.8
Reviews
11.9K
Latest month sales
B0D96SVNZS
Filtrete 18x24x1 Air Filter, 3M MERV 1 HVAC AC Furnace Filter Replacement, 6-Pack (Actual Size 17.81x23.81x0.88 in)
Unlock to view ASIN details and product titles
Price
$35.99
Rating
4.6
Reviews
263
Latest month sales
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