---
title: "8 Inch Carbon Filter — $24K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/8-inch-carbon-filter"
last_updated: "2026-08-09T08:11:21.992Z"
locale: en
meta:
description: "Niche score 21/100 · $24K/yr market · 9K searches/yr · $138.47 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 21/100 · $24K/yr market · 9K searches/yr · $138.47 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "8 Inch Carbon Filter — $24K/yr Amazon US Niche (2026) - Flapen"
---
# **8 inch carbon filter**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 6Growth 15Conversion 25Competition 15Returns 40Price range 27Avg price 62Brand share 0Review moat 29Quality gap 37
**Avg price**
**Good****$138.47**
avg listing price — sweet spot $15–$100
**Returns**
**Okay****3.8%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****3,560**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****$26.50–$294.42**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Bad****2.0%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-20.5%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$24K**
$24K/yr · 9K searches
**Brand share**
**Bad****100%**
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, 8 inch carbon filter is a $24K/yr Amazon United States market (9K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 21/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **8 inch carbon filter market data**
- **Units sold / yr**
- **250–500**
- avg 0–100/product
- **Revenue / yr**
- **$35K–$69K**
- units × avg price
- **Conversion rate**
- **2.0%**
- **Avg BSR**
- **#111**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **9.5%**
- **Avg brand age**
- **65 months**
- **Avg seller age**
- **217 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▼falling
**Sellers**
**9**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**0%**
- AC Infinity52% - VIVOSUN35% - Atomic Innovations5% - Hon&Guan4% - VEVOR4%
## **Demand & seasonality**
Weekly Amazon search volume, last 101 weeks — -20.5% search growth over the last 90 days.
300200Holiday '24Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/8-inch-carbon-filter/trend)
## **Top 8 inch carbon 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%$2K20%$5K30%$7K40%$10K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**AC Infinity Air Carbon Filter 8 with Premium Australian Virgin Charcoal for Inline Duct Fan Odor Control Hydroponics Grow Rooms**AC Infinity**$117.56**4.8★10,224 rev](https://www.amazon.com/dp/B07GTGY8PD) [2**VIVOSUN 8 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal for Inline Fan Grow Tent Smelliness Scrubber Pre-Filter Included Reversible Flange 8 x 20 Black**VIVOSUN**$97.80**4.6★1,643 rev](https://www.amazon.com/dp/B08M42FD1V) [3**VIVOSUN 8 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal for Inline Duct Fan Grow Tent Pre-Filter Included Reversible Flange 8x 20**VIVOSUN**$97.26**4.6★10,044 rev](https://www.amazon.com/dp/B01DXYMHWS) [4**AC Infinity Air Carbon Filter XL 8 with Premium Australian Virgin Charcoal Pre-Filter and Rope Hangers Odor Scrubber fit for Inline Duct Fan Odor Control Hydroponics**AC Infinity**$127.37**4.3★310 rev](https://www.amazon.com/dp/B09TQ1HP7W) [5**AC Infinity Refillable Carbon Filter Kit 8 with Additional Refill Odor Removal Air Scrubber For 8 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics**AC Infinity**$228.31**4.7★495 rev](https://www.amazon.com/dp/B0CFCJCJYY)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**VEVOR 8 Air Filtration Kit 180 CFM Inline Duct Fan with Speed Controller Carbon Filter & Ducting Ventilation System for Heating Cooling Booster Grow Tents Hydroponics**VEVOR**$121.79**2 rev7mo ago](https://www.amazon.com/dp/B0G4TKMTBJ) [**Hon&Guan 8 Air Filtration Kit: 8 Inch Inline Duct Fan with Speed Controller 16 High Carbon Filter 16 Ft Ducting & Rubber Coupler Ventilation System for Grow Tents Indoor Gardening Hydroponics**Hon&Guan**$132.53**260 rev1y ago](https://www.amazon.com/dp/B0DFM9CXM9) [**AC Infinity Refillable Carbon Filter Kit 8 with Additional Refill Odor Removal Air Scrubber For 8 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics**AC Infinity**$228.31**495 rev2y ago](https://www.amazon.com/dp/B0CFCJCJYY) [**AC Infinity Air Filtration Kit 8 CLOUDLINE LITE Inline Fan and Carbon Filter Combo Cooling and Ventilation System for Grow Tents Hydroponics Indoor Gardening**AC Infinity**$294.42**1,614 rev5y ago](https://www.amazon.com/dp/B0BCD92LGJ) [**VIVOSUN 8 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal for Inline Fan Grow Tent Smelliness Scrubber Pre-Filter Included Reversible Flange 8 x 20 Black**VIVOSUN**$97.80**1,643 rev5y ago](https://www.amazon.com/dp/B08M42FD1V)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**VEVOR 8 Air Filtration Kit 180 CFM Inline Duct Fan with Speed Controller Carbon Filter & Ducting Ventilation System for Heating Cooling Booster Grow Tents Hydroponics**VEVOR**$121.79**4.5★**▲ 99%**](https://www.amazon.com/dp/B0G4TKMTBJ) [**AC Infinity Air Filtration Kit 8 CLOUDLINE LITE Inline Fan and Carbon Filter Combo Cooling and Ventilation System for Grow Tents Hydroponics Indoor Gardening**AC Infinity**$294.42**4.7★**▲ 31%**](https://www.amazon.com/dp/B0BCD92LGJ) [**AC Infinity Air Carbon Filter XL 8 with Premium Australian Virgin Charcoal Pre-Filter and Rope Hangers Odor Scrubber fit for Inline Duct Fan Odor Control Hydroponics**AC Infinity**$127.37**4.3★**▲ 30%**](https://www.amazon.com/dp/B09TQ1HP7W) [**VIVOSUN 8 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal for Inline Duct Fan Grow Tent Pre-Filter Included Reversible Flange 8x 20**VIVOSUN**$97.26**4.6★**▲ 26%**](https://www.amazon.com/dp/B01DXYMHWS) [**AC Infinity Refillable Carbon Filter Kit 8 with Additional Refill Odor Removal Air Scrubber For 8 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics**AC Infinity**$228.31**4.7★**— 2%**](https://www.amazon.com/dp/B0CFCJCJYY)
**~~View all trending →~~**
## **What buyers say about 8 inch carbon filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Functionality-Overall**33%
*“Ok. Anything that is automated is great because you dont have to do anything not not 100% efficient sometimes when it should be off it is on and vice versa”*
**Smell**17%
*“still keeping odors undetected”*
**Advertised Vs Actual Product**17%
*“As advertised”*
**Quality-Overall**11%
*“The coupler is quality”*
**Ease Of Cleaning**11%
*“Clean”*
### **What buyers complain about **
**Filtration**50%
*“This doesnt have the strength to push through the filter with any kind of authority”*
**Durability**10%
*“It Didnt last long for me”*
**Value For Money**7%
*“I wonder why it's more expensive than their competitor's on Amazon”*
**Functionality-Overall**7%
*“Doesn't work”*
**Spray/Flow**7%
*“so the air couldn't flow”*
**Advertised Vs Actual Product**7%
*“The CFM rating on this 8in unit is not as advertised”*
### **Top return reasons **
**Size-Overall**58%
**Filtration**11%
**Advertised Vs Actual Product**8%
**Defective Material/Parts**6%
**Smell**5%
**Carbon Footprint**2%
**Functionality-Overall**2%
**Product Condition**2%
**Spray/Flow**1%
**Compatibility-Overall**1%
## **Common questions**
- **Is 8 inch carbon filter profitable to sell on Amazon United States?**
- The niche generates $24K/yr across 10 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -20.5%. Flapen's verdict: Skip it (21/100).
- **How competitive is the 8 inch carbon filter niche?**
- 5 brands and 9 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in 8 inch carbon filter?**
- Top complaints mined from reviews: Filtration, Durability, Value For Money. The return rate is 3.8%.
- **When does demand for 8 inch carbon filter peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the 8 inch carbon filter niche?**
- Listings span $26.50–$294.42; the average listing price is $138.47 (sweet spot $15–$100). The average incumbent carries 3,560 reviews — the moat a new listing must climb.
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