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17x21x1 Air Filter

Fail

The top 5 brands take 100% of clicks, so 17x21x1 Air Filter is a Fail.

Flapen Score
44
44 / 100
Ranks 6,173 of 9,536 Tools & Home Improvement niches · −4 vs the category median of 48
Market size
$65K/yr13K searches / yr
90-day growth
+44.3%search demand this quarter
Competition
98%top-5 click share · 3 brands · 7 sellers

Flapen Score

17x21x1 Air Filter against its category

The dotted line is the Tools & Home Improvement average. Past it, 17x21x1 Air Filter is stronger. Inside it, weaker.

44Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The 17x21x1 Air Filter market on Amazon at a glance

Shoppers on Amazon United States searched for 17x21x1 Air Filter 13K times last year and spent an estimated $65K. All 3 brands take every click. Demand peaks in Jul–Aug. Flapen scores it 44 out of 100, a Fail.

01 · Demand

12.0% of searches ended in a purchase last week.

Shoppers searched for this 13K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. In the latest week, 12.0% of those searches ended in a purchase. Searches in the last 90 days moved +44.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $65K a year.

Searches, last 12 months
13K
Growth, 90 days vs prior 90
+44.3%
Conversion, latest week
12.0%
Market size, estimated
$65Ka year
Peak month
July1.7× the quietest month
Top search term
17x21x1 air filter10K searches a year

02 · Price

A sale here is worth $42.82.

Listings sell for $42.82 on average, from $31.88 to $59.92. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At $42.82 that is $4K to $11K a year per listing.

Average price
$42.82inside the $15 to $100 sweet spot
Price range
$31.88–$59.92
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
2K–2K
Units per listing a year
100–250
Revenue per listing a year
$4K–$11K
Returns
1.7%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

83% of listings pay for placement with sponsored ads. 33% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #327 within Furnace Parts & Accessories. It carries 2,195 reviews at 4.65 stars, so a new listing needs social proof before a better product.

Sponsored listings
83%
Prime listings
33%
Out of stock, average day
0.0%
Average rank
#327in Furnace Parts & Accessories
Average rating
4.65 starsAmazon United States average 4.42 stars
Average reviews
2,195per listing
Listings tracked
6

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 55 months on average, so the names here are settling in.

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

Products

Top 17x21x1 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 98% of clicks. A locked shelf that new listings rarely crack.

$0$10K$20K$29K$39K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

3 flat

Sellers

7

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

98%

Top 20: 100%

Open market

0%

  • Filter King57%
  • Filtrete38%
  • Aerostar4%

Demand

17x21x1 Air Filter search demand

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

400300Spike '24Spike '25Prime Day '25Spike '26DecMarJunAugNovMarMay

Peak months: Jul, Aug · busiest ÷ quietest = 1.7×

Reviews and returns

What reviews say buyers love and hate about 17x21x1 Air Filter

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

44%of positive reviews mention “Quality-Overall”
33%of negative reviews mention “Filtration”
1.7%of orders come back
“This filter is incredibly cheap and flimsy”
A buyer, on “Filtration”33% 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.

14 topics

NegativePositive

FAQ

Common 17x21x1 Air Filter questions

Answered from the same tracked data.