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16x20x4 Air Filter

Maybe

Buyers convert on 11.9% of searches. But the average product has 8,698 reviews to catch up to, so 16x20x4 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
$1.1M/yr165K searches / yr
90-day growth
+18.9%search demand this quarter
Competition
61%top-5 click share · 11 brands · 42 sellers

Flapen Score

16x20x4 Air Filter against its category

The dotted line is the Tools & Home Improvement average. Past it, 16x20x4 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 16x20x4 Air Filter market on Amazon at a glance

Shoppers on Amazon United States searched for 16x20x4 Air Filter 165K times last year and spent an estimated $1.1M. The top 5 brands take 86% of clicks. Demand peaks in Jul. Flapen scores it 61 out of 100, a Maybe.

01 · Demand

An estimated 11.9% of those searches ended in a purchase.

Shoppers searched for this 165K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 11.9% of those searches ended in a purchase. Searches in the last 90 days moved +18.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated $1.1M a year.

Searches, last 12 months
165K
Growth, 90 days vs prior 90
+18.9%
Conversion, latest week
11.9%
Market size, estimated
$1.1Ma year
Peak month
July1.6× the quietest month
Top search term
16x20x4 air filter61K searches a year

02 · Price

A sale here is worth $58.49.

Listings sell for $58.49 on average, from $18.85 to $117.85. Amazon reports units sold in ranges. This niche sold 20K to 25K a year. The average listing sells 750 to 1,000 of them. At $58.49 that is $44K to $58K a year per listing.

Average price
$58.49inside the $15 to $100 sweet spot
Price range
$18.85–$117.85
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
20K–25K
Units per listing a year
750–1,000
Revenue per listing a year
$44K–$58K
Returns
1.1%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

86% 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 #186 within Furnace Parts & Accessories. It carries 8,698 reviews at 4.52 stars, so a new listing needs social proof before a better product.

Sponsored listings
86%
Prime listings
33%
Out of stock, average day
0.0%
Average rank
#186in Furnace Parts & Accessories
Average rating
4.52 starsAmazon United States average 4.42 stars
Average reviews
8,698per listing
Listings tracked
21

04 · Newcomers

0 of last year's 3 launches cleared the first-year sales bar.

3 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 57 months on average, so the names here are settling in.

Launched, last 12 months
3
Successful launches
0Amazon's first-year sales bar
Average brand age
57 months

Products

Top 16x20x4 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 61% of clicks. Leaders hold, but buyers still shop past them.

$0$57K$115K$172K$229K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

11 rising

Sellers

42

Est. top-5 brand share

86%

Top 20: 100%

Est. top-5 click share

61%

Top 20: 99%

Open market

9%

  • Filterbuy43%
  • Filtrete19%
  • Nordic Pure13%
  • MANN+HUMMEL6%
  • Honeywell5%
  • BNX5%
  • Open — no brand owns it (5 brands, 9%)

Demand

16x20x4 Air Filter search demand

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

5K4KSpike '24Holiday '24Spike '25Prime Day '25Spike '26Prime Day '26SepDecMarJunAugNovMarMay

Peak months: Jul · busiest ÷ quietest = 1.6×

Search terms

Top 16x20x4 Air Filter search terms shoppers use

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

  • 16x20x4 air filter61K/yr
  • 16x20x4 furnace filter34K/yr
  • air filter 16x20x412K/yr
  • furnace filter 16x20x411K/yr
  • 16x20x49K/yr
  • ac filter 16x20x45K/yr
  • 16 x 20 x 4 air filter7K/yr
  • furnace filters 16x20x48K/yr
  • 16x20x4 filter4K/yr
  • 16x20x4 air filter merv 114K/yr

Reviews and returns

What reviews say buyers love and hate about 16x20x4 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”
1.1%of orders come back
“TOO SMALL”
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.

19 topics

NegativePositive

FAQ

Common 16x20x4 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