---
title: "20x20x5 Air Filter — $681K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/20x20x5-air-filter"
last_updated: "2026-08-06T14:57:53.180Z"
locale: en
meta:
description: "Niche score 58/100 · $681K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 58/100 · $681K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "20x20x5 Air Filter — $681K/yr Amazon US Niche (2026) - Flapen"
---
# **20x20x5 air filter**
**Worth a look**
Shows low returns (0.8%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 68Growth 53Conversion 90Competition 32Returns 96Price range 95Avg price 90Brand share 18Review moat 36Quality gap 40
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Price range**
**Incredible****$28.83–$88.51**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****10.7%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$57.54**
avg listing price — sweet spot $15–$100
**Market size**
**Good****$681K**
$681K/yr · 110K searches
**Growth**
**Good****+25.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****2,850.88**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, 20x20x5 air filter is a $681K/yr Amazon United States market (110K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Aug–Sep. Verdict: Worth a look — 58/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **20x20x5 air filter market data**
- **Units sold / yr**
- **13K–15K**
- avg 750–1,000/product
- **Revenue / yr**
- **$719K–$863K**
- units × avg price
- **Conversion rate**
- **10.7%**
- **Avg BSR**
- **#464**
- **Page quality**
- **0%**
- **Prime**
- **56%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **63 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **▼falling
**Sellers**
**18**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**4%**
- Filterbuy41% - Nordic Pure24% - AIRx Filters18% - BNX5% - Lennox4% - Sikidink3% - Open — no brand owns it (2 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 103 weeks — +25.5% search growth over the last 90 days.
30K20KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonDecMarJunAugNovMarMay
Peak months: Aug, Sep · busiest ÷ quietest = 7.6×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/20x20x5-air-filter/trend)
## **Top 20x20x5 air filter search terms**
- **20x20x5 air filter**52K/yr+35.9%9.9% conv. - **20x20x5 furnace filter**14K/yr-6.1%8.0% conv. - **20x20x5**8K/yr+28.1%7.8% conv. - **air filter 20x20x5**8K/yr+37.4%10.3% conv. - **20x20x5 air filter merv 11**6K/yr+27.2%7.3% conv. - **20 x 20 x 5 air filter**4K/yr+52.2%10.8% conv. - **20x20x5 air filter merv 13**4K/yr+30.3%4.4% conv. - **20x20x5 filter**4K/yr+29.1%8.3% conv. - **furnace filters 20x20x5**4K/yr-0.2%10.5% conv. - **furnace filter 20x20x5**4K/yr-0.1%12.2% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/20x20x5-air-filter/search-terms)
## **Top 20x20x5 air filter products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$68K20%$136K30%$204K40%$272K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Filterbuy 20x20x5 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1011 Lennox X0585 and More (Actual Size: 19.63 x 19.88 x 4.38)**Filterbuy**$59.24**4.6★19,747 rev](https://www.amazon.com/dp/B00NVF4YBW) [2**Nordic Pure 20x20x5 (19_5/8 x 19_7/8 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack**Nordic Pure**$56.81**4.7★2,197 rev](https://www.amazon.com/dp/B005ESP3SW) [3**Nordic Pure 20x20x5 Honeywell/Lennox Replacement MERV 12 Air Filter 1 Pack**Nordic Pure**$28.83**4.7★2,197 rev](https://www.amazon.com/dp/B005ESP3NM) [4**Filterbuy 20x20x5 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1011 Lennox X0585 and More (Actual Size: 19.63 x 19.88 x 4.38)**Filterbuy**$78.60**4.6★13,433 rev](https://www.amazon.com/dp/B00NVGY3GC) [5**AIRx Filters 20x20x5 Furnace Filter MERV 8 HVAC AC Air Filter Replacement for Honeywell FC100A1011 FC200E1011 CF200A1024 Dust Pollen Lint & Dander Control 2-Pack**AIRx Filters**$55.02**4.3★114 rev](https://www.amazon.com/dp/B079YT4X7T)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**20x20x5 Furnace Filter MERV13 Compatible with Lennox X0585 HCF14-11 for Honeywell FC100A1011 Foldable(Actual Size:19.88 x 19.63 x 4.38 In) 2-Pack**Sikidink**$55.82**21 rev6mo ago](https://www.amazon.com/dp/B0GD4X4GQ7) [**PZHARQG X0585 Filter Replacement 20x20x5 Compatible with Lennox X0585 HCF14-11 for Honeywell FC100A1011 MERV 13 Furnace HVAC Foldable**PZHARQG**$38.74**15 rev7mo ago](https://www.amazon.com/dp/B0G4M5XPSY) [**BNX TruFilter 20x20x5 (19.88 x 19.88 x 4.38 Honeywell Compatible 4) MERV 11 Air Filter (2-Pack) - MADE IN USA - HVAC AC Furnace Filters Health Allergies Mold Bacteria Smoke MPR 1200 FPR 7**BNX**$67.78**6,309 rev11mo ago](https://www.amazon.com/dp/B0FM5K4H7M) [**BNX TruFilter 20x20x5 (19.88 x 19.88 x 4.38 Honeywell Compatible 4) MERV 13 Air Filter (2-Pack) - MADE IN USA - HVAC AC Furnace Filters Health Allergies Mold Bacteria Smoke MPR 1900 FPR 10**BNX**$78.55**58 rev1y ago](https://www.amazon.com/dp/B0DK9ZVJ79) [**AIRX FILTERS WICKED CLEAN AIR. 20x20x5 Air Filter MERV 8 Compatible with Honeywell FC100A1011 Furnace Filter 2 Pack**AIRx Filters**$55.53**135 rev2y ago](https://www.amazon.com/dp/B0CF7SK4K5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**PZHARQG X0585 Filter Replacement 20x20x5 Compatible with Lennox X0585 HCF14-11 for Honeywell FC100A1011 MERV 13 Furnace HVAC Foldable**PZHARQG**$38.74**4.2★**▲ 184%**](https://www.amazon.com/dp/B0G4M5XPSY) [**BNX TruFilter 20x20x5 (19.88 x 19.88 x 4.38 Honeywell Compatible 4) MERV 11 Air Filter (2-Pack) - MADE IN USA - HVAC AC Furnace Filters Health Allergies Mold Bacteria Smoke MPR 1200 FPR 7**BNX**$67.78**4.7★**▲ 170%**](https://www.amazon.com/dp/B0FM5K4H7M) [**20x20x5 Furnace Filter MERV13 Compatible with Lennox X0585 HCF14-11 for Honeywell FC100A1011 Foldable(Actual Size:19.88 x 19.63 x 4.38 In) 2-Pack**Sikidink**$55.82**4.2★**▲ 147%**](https://www.amazon.com/dp/B0GD4X4GQ7) [**AIRx Filters 20x20x5 Furnace Filter MERV 8 HVAC AC Air Filter Replacement for Honeywell FC100A1011 FC200E1011 CF200A1024 Dust Pollen Lint & Dander Control 1-Pack**AIRx Filters**$34.92**4.0★**▲ 74%**](https://www.amazon.com/dp/B072BBCGV3) [**AIRX FILTERS WICKED CLEAN AIR. 20x20x5 Air Filter MERV 11 Compatible with Lennox X0585 Air Filter 2 Pack**AIRx Filters**$61.41**4.6★**▲ 52%**](https://www.amazon.com/dp/B0CF8595ZQ)
**~~View all trending →~~**
## **What buyers say about 20x20x5 air filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**28%
*“Excellent filter”*
**Size-Overall**25%
*“Good fit”*
**Quality-Overall**10%
*“seem well-made”*
**Value For Money**7%
*“Fair price”*
**Advertised Vs Actual Product**5%
*“Product was just as advertised”*
**Efficiency**4%
*“Just as effective”*
**Ease Of Use**3%
*“Ease of use”*
**Storage Capacity**2%
*“Convenient Storage”*
**Durability**2%
*“Pleats haven't collapsed after three months of use”*
**Design-Overall**2%
*“Well built, I'll purchase it again”*
### **What buyers complain about **
**Size-Overall**28%
*“still could not get it to fit”*
**Filtration**27%
*“Filters are very poor quality”*
**Value For Money**13%
*“very pricey”*
**Quality-Overall**13%
*“Poor quality”*
**Thickness**4%
*“The material feels thicker than my last brand”*
**Assembly/Installation**2%
*“has to be assembled with cheap plastic clips”*
### **Top return reasons **
**Size-Overall**71%
**Filtration**15%
**Compatibility-Overall**5%
**Advertised Vs Actual Product**3%
**Maintenance And Repair**1%
**Value For Money**1%
**Defective Material/Parts**1%
**Ease Of Use**1%
**Functionality-Overall**0%
**Thickness**0%
## **Common questions**
- **Is 20x20x5 air filter profitable to sell on Amazon United States?**
- The niche generates $681K/yr across 16 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +25.5%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the 20x20x5 air filter niche?**
- 8 brands and 18 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in 20x20x5 air filter?**
- Top complaints mined from reviews: Size-Overall, Filtration, Value For Money. The return rate is 0.8%.
- **When does demand for 20x20x5 air filter peak?**
- Demand peaks in Aug–Sep; the busiest month runs 7.6× the quietest.
- **What does it cost to enter the 20x20x5 air filter niche?**
- Listings span $28.83–$88.51; the average listing price is $57.54 (sweet spot $15–$100). The average incumbent carries 2,851 reviews — the moat a new listing must climb.
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