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13x21.5x1 Air Filter

Fail

The top 5 brands take 96% of clicks, so 13x21.5x1 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
$86K/yr28K searches / yr
90-day growth
+53.2%search demand this quarter
Competition
76%top-5 click share · 7 brands · 10 sellers

Flapen Score

13x21.5x1 Air Filter against its category

The dotted line is the Tools & Home Improvement average. Past it, 13x21.5x1 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 13x21.5x1 Air Filter market on Amazon at a glance

Shoppers on Amazon United States searched for 13x21.5x1 Air Filter 28K times last year and spent an estimated $86K. The top 5 brands take 96% of clicks. Demand peaks in Jun–Jul. Flapen scores it 48 out of 100, a Fail.

01 · Demand

7.2% of searches ended in a purchase last week.

Shoppers searched for this 28K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. In the latest week, 7.2% of those searches ended in a purchase. Searches in the last 90 days moved +53.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated $86K a year.

Searches, last 12 months
28K
Growth, 90 days vs prior 90
+53.2%
Conversion, latest week
7.2%
Market size, estimated
$86Ka year
Peak month
July2.2× the quietest month
Top search term
13x21.5x1 air filter15K searches a year

02 · Price

A sale here is worth $41.77.

Listings sell for $41.77 on average, from $26.55 to $60.18. Amazon reports units sold in ranges. This niche sold 3K to 3K a year. The average listing sells 100 to 250 of them. At $41.77 that is $4K to $10K a year per listing.

Average price
$41.77inside the $15 to $100 sweet spot
Price range
$26.55–$60.18
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
3K–3K
Units per listing a year
100–250
Revenue per listing a year
$4K–$10K
Returns
0.2%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

75% of listings pay for placement with sponsored ads. 25% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #241 within Furnace Parts & Accessories. It carries 14,247 reviews at 4.65 stars, so a new listing needs social proof before a better product.

Sponsored listings
75%
Prime listings
25%
Out of stock, average day
0.0%
Average rank
#241in Furnace Parts & Accessories
Average rating
4.65 starsAmazon United States average 4.42 stars
Average reviews
14,247per listing
Listings tracked
16

04 · Newcomers

Brands here are established.

The brands on the shelf have sold for 71 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
71 months

Products

Top 13x21.5x1 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 76% of clicks. A locked shelf that new listings rarely crack.

$0$9K$17K$26K$34K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

7 flat

Sellers

10

Top-5 brand share

96%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

2%

  • Filterbuy34%
  • Filtrete28%
  • Filter King25%
  • Aerostar7%
  • AIRx Filters2%
  • Simply2%
  • Open — no brand owns it (1 brand, 2%)

Demand

13x21.5x1 Air Filter search demand

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

1K600Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jun, Jul · busiest ÷ quietest = 2.2×

Search terms

Top 13x21.5x1 Air Filter search terms shoppers use

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

  • 13x21.5x1 air filter15K/yr
  • air filter 13x21.5x16K/yr
  • furnace filters 13x21.5x14K/yr
  • 13x21.5x1 furnace filter4K/yr

Reviews and returns

What reviews say buyers love and hate about 13x21.5x1 Air Filter

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

27%of positive reviews mention “Size-Overall”
33%of negative reviews mention “Strength”
0.2%of orders come back
“are super flimsy”
A buyer, on “Strength”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 13x21.5x1 Air Filter questions

Answered from the same tracked data.