---
title: "X6670 — $105K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/x6670"
last_updated: "2026-08-08T10:15:58.551Z"
locale: en
meta:
description: "Niche score 47/100 · $105K/yr market · 11K searches/yr · $63.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $105K/yr market · 11K searches/yr · $63.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "X6670 — $105K/yr Amazon US Niche (2026) - Flapen"
---
# **x6670**
**Skip it**
A concentrated shelf (top 5 take 72% of clicks) — this niche doesn't clear our bar today.
Market size 26Growth 26Conversion 97Competition 23Returns 96Price range 78Avg price 88Brand share 24Review moat 41Quality gap 38
**Conversion**
**Incredible****15.7%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$63.40**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$38.90–$116.41**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,358**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$105K**
$105K/yr · 11K searches
**Growth**
**Okay****+1.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****72%**
top-5 click share — a locked-up shelf
**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, x6670 is a $105K/yr Amazon United States market (11K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 47/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **x6670 market data**
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$95K–$127K**
- units × avg price
- **Conversion rate**
- **15.7%**
- **Avg BSR**
- **#201**
- **Page quality**
- **0%**
- **Prime**
- **79%**
- **Sponsored**
- **93%**
- **Out of stock**
- **3.6%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **189 days**
## **Competition & brand share**
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **—flat
**Sellers**
**31**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**72%**
Top 20: 100%
**Open market**
**7%**
- HEALTHY CLIMATE46% - Lennox15% - Filterbuy14% - Filtrete10% - AIRx Filters6% - DerBlue3% - Open — no brand owns it (3 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 100 weeks — +1.0% search growth over the last 90 days.
2K1KSpike '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.3×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/x6670/trend)
## **Top x6670 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%$11K20%$21K30%$32K40%$42K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters Lennox Healthy Climate Filter for Home with Cleaning Cloth 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)**HEALTHY CLIMATE**$59.20**4.8★57 rev](https://www.amazon.com/dp/B0FN5SGKV4) [2**Lennox X6670 - (2-Pack) Healthy Climate 16 x 25 x 5 OEM HCF16-11 Air Filter MERV 11**Lennox**$60.62**4.8★1,781 rev](https://www.amazon.com/dp/B00D5YJAAO) [3**Filterbuy 16x25x5 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1029 Lennox X6670 and More (Actual Size: 15.75 x 24.75 x 4.38)**Filterbuy**$71.15**4.6★924 rev](https://www.amazon.com/dp/B00NVICAOW) [4**Filtrete 16x25x5 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.63x24.74x4.31 in)**Filtrete**$47.85**4.6★1,680 rev](https://www.amazon.com/dp/B0BVXJG134) [5**Lennox X6670 MERV 11 Box Replacement Filter also for Honeywell 16 H x 25 L x 5 W (3-Pack)**HEALTHY CLIMATE**$85.11**4.8★3,043 rev](https://www.amazon.com/dp/B07B3NJDNB)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**2 Pack 16x25x5 Furnace Filter Replacement Compatible with Lennox X6670 HCF16 MERV 13 Pleated HVAC Foldable Design Easy Installation**Henmfely**$50.18**8 rev5mo ago](https://www.amazon.com/dp/B0GLDRQVHW) [**Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters Lennox Healthy Climate Filter for Home with Cleaning Cloth 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)**HEALTHY CLIMATE**$59.20**57 rev9mo ago](https://www.amazon.com/dp/B0FN5SGKV4) [**DerBlue 2PACK 16x25x5 MERV 13 Furnace Filter Replacement Compatible with Lennox X6670 HCF16 Pleated HVAC Foldable Design for Easy Installation & Space-Saving(Actual Size: 15.75 x 24.75 x 4.38in)**DerBlue**$47.51**60 rev11mo ago](https://www.amazon.com/dp/B0FL6DM34J) [**Filtrete 16x25x5 AC Furnace Air Filter MERV 13 MPR 1900 Premium Allergen Bacteria & Virus Filter Electrostatic Air Cleaning Filter 2-Pack (Actual Size 15.75 x 24.13 x 4.88 in)**Filtrete**$73.09**379 rev1y ago](https://www.amazon.com/dp/B0DCGPQ88M) [**AIRX FILTERS WICKED CLEAN AIR. 16x25x5 Air Filter MERV 11 Compatible with Lennox X6670 Air Filter 2 Pack**AIRx Filters**$48.77**93 rev2y ago](https://www.amazon.com/dp/B0CF7W9KXC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**2 Pack 16x25x5 Furnace Filter Replacement Compatible with Lennox X6670 HCF16 MERV 13 Pleated HVAC Foldable Design Easy Installation**Henmfely**$50.18**3.1★**▲ 206%**](https://www.amazon.com/dp/B0GLDRQVHW) [**AIRX FILTERS WICKED CLEAN AIR. 16x25x5 Air Filter MERV 11 Compatible with Lennox X6670 Air Filter 2 Pack**AIRx Filters**$48.77**4.6★**▲ 167%**](https://www.amazon.com/dp/B0CF7W9KXC) [**Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters Lennox Healthy Climate Filter for Home with Cleaning Cloth 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)**HEALTHY CLIMATE**$59.20**4.8★**▲ 90%**](https://www.amazon.com/dp/B0FN5SGKV4) [**Lennox 19L16-16 x 25 x 5 Healthy Climate HCF16-13 Air filter MERV 13 (2-Pack)**HEALTHY CLIMATE**$86.88**4.8★**▲ 27%**](https://www.amazon.com/dp/B08666947N) [**Nordic Pure 16x25x5 (15_3/4 x 24_3/4 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack**Nordic Pure**$53.28**4.7★**▲ 20%**](https://www.amazon.com/dp/B004QL75VQ)
**~~View all trending →~~**
## **What buyers say about x6670**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**24%
*“Good Filtration performance”*
**Size-Overall**21%
*“Fit well”*
**Quality-Overall**17%
*“Good quality”*
**Advertised Vs Actual Product**10%
*“As advertised”*
**Value For Money**10%
*“Fair price”*
**Ease Of Use**3%
*“easy to use”*
**Assembly/Installation**2%
*“When these showed up I was surprised to find out I actually had to put them together”*
**Strength**2%
*“Seems well built and sturdy”*
**Durability**1%
*“Durability”*
**Storage Capacity**1%
*“But, the accordion style is convenient for storage for the second one”*
### **What buyers complain about **
**Size-Overall**31%
*“too short (16 inch dimension)”*
**Thickness**9%
*“as they are both 4.5 inch thick”*
**Filtration**9%
*“Filter is not true to size-it's larger”*
**Value For Money**8%
*“Not worth saving 7 bucks over the Nordic Pure's”*
**Assembly/Installation**8%
*“This was horrible- these actually require assembly”*
**Quality-Overall**8%
*“Poor Quality”*
**Strength**3%
*“A little flimsy”*
**Stretchability/Expandability/Elasticity**3%
*“Couldnt get it to stretch out enough to fit my furnace”*
**Compatibility-Overall**3%
*“It is not compatible”*
**Advertised Vs Actual Product**1%
*“this is not true to size stated”*
### **Top return reasons **
**Size-Overall**65%
**Filtration**16%
**Compatibility-Overall**8%
**Advertised Vs Actual Product**3%
**Assembly/Installation**2%
**Value For Money**1%
**Defective Material/Parts**1%
**Quality-Overall**1%
**Product Condition**0%
**Thickness**0%
## **Common questions**
- **Is x6670 profitable to sell on Amazon United States?**
- The niche generates $105K/yr across 14 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +1.0%. Flapen's verdict: Skip it (47/100).
- **How competitive is the x6670 niche?**
- 9 brands and 31 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in x6670?**
- Top complaints mined from reviews: Size-Overall, Thickness, Filtration. The return rate is 0.8%.
- **When does demand for x6670 peak?**
- Demand peaks in Oct–Nov–Dec; the busiest month runs 3.3× the quietest.
- **What does it cost to enter the x6670 niche?**
- Listings span $38.90–$116.41; the average listing price is $63.40 (sweet spot $15–$100). The average incumbent carries 2,358 reviews — the moat a new listing must climb.
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