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20x20x4 Air Filter

Maybe

Buyers convert on 13.0% of searches. But the average product has 14,093 reviews to catch up to, so 20x20x4 Air Filter is a Maybe.

Flapen Score
61
61 / 100
Top 6% of 9,536 Tools & Home Improvement niches · +13 vs the category median of 48
Market size
$1.9M/yr249K searches / yr
90-day growth
+22.3%search demand this quarter
Competition
70%top-5 click share · 9 brands · 36 sellers

Flapen Score

20x20x4 Air Filter against its category

The dotted line is the Tools & Home Improvement average. Past it, 20x20x4 Air Filter is stronger. Inside it, weaker.

61Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The 20x20x4 Air Filter market on Amazon at a glance

Shoppers on Amazon United States searched for 20x20x4 Air Filter 249K times last year and spent an estimated $1.9M. The top 5 brands take 90% of clicks. Flapen scores it 61 out of 100, a Maybe.

01 · Demand

An estimated 13.0% of those searches ended in a purchase.

Shoppers searched for this 249K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.0% of those searches ended in a purchase. Searches in the last 90 days moved +22.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $1.9M a year.

Searches, last 12 months
249K
Growth, 90 days vs prior 90
+22.3%
Conversion, latest week
13.0%
Market size, estimated
$1.9Ma year
Peak month
July1.4× the quietest month
Top search term
20x20x4 air filter131K searches a year

02 · Price

A sale here is worth $58.82.

Listings sell for $58.82 on average, from $36.65 to $95.92. Amazon reports units sold in ranges. This niche sold 30K to 40K a year. The average listing sells 1,500 to 2,000 of them. At $58.82 that is $88K to $118K a year per listing.

Average price
$58.82inside the $15 to $100 sweet spot
Price range
$36.65–$95.92
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
30K–40K
Units per listing a year
1,500–2,000
Revenue per listing a year
$88K–$118K
Returns
1.0%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is ads and reviews.

100% of listings pay for placement with sponsored ads. 53% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #64 within Furnace Parts & Accessories. It carries 14,093 reviews at 4.53 stars, so a new listing needs social proof before a better product.

Sponsored listings
100%
Prime listings
53%
Out of stock, average day
0.0%
Average rank
#64in Furnace Parts & Accessories
Average rating
4.53 starsAmazon United States average 4.42 stars
Average reviews
14,093per listing
Listings tracked
15

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 52 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
52 months

Products

Top 20x20x4 Air Filter products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 27, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 70% of clicks. A locked shelf that new listings rarely crack.

$0$190K$379K$569K$759K1001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

9 flat

Sellers

36

Est. top-5 brand share

90%

Top 20: 100%

Est. top-5 click share

70%

Top 20: 100%

Open market

7%

  • Filterbuy39%
  • Filtrete32%
  • Nordic Pure12%
  • MANN+HUMMEL4%
  • BNX4%
  • Aerostar3%
  • Open — no brand owns it (3 brands, 7%)

Demand

20x20x4 Air Filter search demand

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

7K5KSpike '24Spike '25Prime Day '25Spike '26DecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Search terms

Top 20x20x4 Air Filter search terms shoppers use

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

  • 20x20x4 air filter131K/yr
  • air filter 20x20x419K/yr
  • 20x20x4 furnace filter20K/yr
  • 20x20x415K/yr
  • ac filter 20x20x48K/yr
  • 20 x 20 x 4 air filters for home10K/yr
  • furnace filters 20x20x48K/yr
  • furnace filter 20x20x47K/yr
  • 20x20x4 filter6K/yr
  • 20 x 20 x 4 air filter5K/yr

Reviews and returns

What reviews say buyers love and hate about 20x20x4 Air Filter

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

28%of positive reviews mention “Size-Overall”
44%of negative reviews mention “Size-Overall”
1.0%of orders come back
“To big”
A buyer, on “Size-Overall”44% 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.

18 topics

NegativePositive

FAQ

Common 20x20x4 Air Filter questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data