Skip to content

20x21.5x1 Air Filter

Fail

The top 5 brands take 97% of clicks, so 20x21.5x1 Air Filter is a Fail.

Flapen Score
48
48 / 100
Ranks 4,568 of 9,536 Tools & Home Improvement niches · on the category median
Market size
$160K/yr62K searches / yr
90-day growth
+50.9%search demand this quarter
Competition
69%top-5 click share · 8 brands · 16 sellers

Flapen Score

20x21.5x1 Air Filter against its category

The dotted line is the Tools & Home Improvement average. Past it, 20x21.5x1 Air Filter is stronger. Inside it, weaker.

48Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The 20x21.5x1 Air Filter market on Amazon at a glance

Shoppers on Amazon United States searched for 20x21.5x1 Air Filter 62K times last year and spent an estimated $160K. The top 5 brands take 97% of clicks. Demand peaks in Jun–Jul. Flapen scores it 48 out of 100, a Fail.

01 · Demand

5.7% of searches ended in a purchase last week.

Shoppers searched for this 62K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. In the latest week, 5.7% of those searches ended in a purchase. Searches in the last 90 days moved +50.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated $160K a year.

Searches, last 12 months
62K
Growth, 90 days vs prior 90
+50.9%
Conversion, latest week
5.7%
Market size, estimated
$160Ka year
Peak month
July5.2× the quietest month
Top search term
20x21x1 air filter22K searches a year

02 · Price

A sale here is worth $45.52.

Listings sell for $45.52 on average, from $18.15 to $108.16. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 100 to 250 of them. At $45.52 that is $5K to $11K a year per listing.

Average price
$45.52inside the $15 to $100 sweet spot
Price range
$18.15–$108.16
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
4K–5K
Units per listing a year
100–250
Revenue per listing a year
$5K–$11K
Returns
1.0%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

79% of listings pay for placement with sponsored ads. 47% ship with Prime. On an average day, 5.5% of listings are out of stock. The average listing ranks #368 within Furnace Parts & Accessories. It carries 19,322 reviews at 4.68 stars, so a new listing needs social proof before a better product.

Sponsored listings
79%
Prime listings
47%
Out of stock, average day
5.5%
Average rank
#368in Furnace Parts & Accessories
Average rating
4.68 starsAmazon United States average 4.42 stars
Average reviews
19,322per listing
Listings tracked
19

04 · Newcomers

Brands here are established.

The brands on the shelf have sold for 85 months on average, so the names here are established.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
85 months

Products

Top 20x21.5x1 Air Filter products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 69% of clicks. Leaders hold, but buyers still shop past them.

$0$8K$16K$24K$32K1101001K10K100K1.0M Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

8 falling

Sellers

16

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

69%

Top 20: 100%

Open market

2%

  • Filter King46%
  • Filtrete34%
  • Filterbuy12%
  • Aerostar2%
  • Simply2%
  • Enviroflow1%
  • Open — no brand owns it (2 brands, 2%)

Demand

20x21.5x1 Air Filter search demand

Weekly searches over the year, seasonality beneath. Pick a range.

2K2KSpike '25Prime Day '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Jun, Jul · busiest ÷ quietest = 5.2×

Search terms

Top 20x21.5x1 Air Filter search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • 20x21x1 air filter22K/yr
  • 20x21.5x1 air filter10K/yr
  • air filter 20x21x16K/yr
  • air filter 20x21.5x15K/yr
  • furnace filters 20x21x14K/yr
  • furnace filters 20x21.5x14K/yr
  • 20x21.5x1 furnace filter3K/yr
  • 20x21x1 furnace filter4K/yr
  • 20 x 21 x 1 air filter3K/yr

Reviews and returns

What reviews say buyers love and hate about 20x21.5x1 Air Filter

We read the reviews and the return reasons for every product selling here.

31%of positive reviews mention “Value For Money”
19%of negative reviews mention “Quality-Overall”
1.0%of orders come back
“Poor quality”
A buyer, on “Quality-Overall”19% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

17 topics

NegativePositive

FAQ

Common 20x21.5x1 Air Filter questions

Answered from the same tracked data.