---
title: "6 Inch Inline Fan — $477K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/6-inch-inline-fan"
last_updated: "2026-08-09T04:30:45.187Z"
locale: en
meta:
description: "Niche score 39/100 · $477K/yr market · 174K searches/yr · $84.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · $477K/yr market · 174K searches/yr · $84.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "6 Inch Inline Fan — $477K/yr Amazon US Niche (2026) - Flapen"
---
# **6 inch inline fan**
**Skip it**
Brand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Market size 59Growth 29Conversion 41Competition 38Returns 30Price range 30Avg price 81Brand share 14Review moat 31Quality gap 47
**Avg price**
**Great****$84.55**
avg listing price — sweet spot $15–$100
**Market size**
**Good****$477K**
$477K/yr · 174K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****3.2%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****3,384.7**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****4.6%**
return rate — above 5% kills the launch gate
**Price range**
**Okay****$25.21–$273.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+3.2%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****95%**
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, 6 inch inline fan is a $477K/yr Amazon United States market (174K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Dec. Verdict: Skip it — 39/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **6 inch inline fan market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **$507K–$676K**
- units × avg price
- **Conversion rate**
- **3.2%**
- **Avg BSR**
- **#76**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **96%**
- **Out of stock**
- **6.4%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▲rising
**Sellers**
**14**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 97%
**Open market**
**4%**
- AC Infinity49% - VIVOSUN23% - Hon&Guan13% - VEVOR6% - LEOKV3% - Aydomer2% - Open — no brand owns it (3 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +3.2% search growth over the last 90 days.
5K3KHoliday '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Dec · busiest ÷ quietest = 3.8×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/6-inch-inline-fan/trend)
## **Top 6 inch inline fan search terms**
- **6 inline duct fan**16K/yr+1.4%3.7% conv. - **6 inch inline duct fan**17K/yr-12.2%3.7% conv. - **6 inch duct fan**16K/yr+1.8%2.7% conv. - **6 inch inline fan**14K/yr+24.3%2.2% conv. - **ac infinity inline fan**15K/yr-25.2%1.3% conv. - **inline duct fan 6 inch**11K/yr+18.4%1.8% conv. - **6 duct fan**13K/yr-17.3%3.8% conv. - **inline fan 6 inch**9K/yr+9.6%2.2% conv. - **6 inline fan**8K/yr+5.5%3.4% conv. - **ac infinity exhaust fan**8K/yr+8.2%0.9% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/6-inch-inline-fan/search-terms)
## **Top 6 inch inline fan 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%$48K20%$95K30%$143K40%$191K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**AC Infinity CLOUDLINE PRO S6 Quiet 6 Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster Grow Tents Hydroponics**AC Infinity**$97.73**4.8★5,508 rev](https://www.amazon.com/dp/B07FPFVZTZ) [2**VIVOSUN 6 Inline Exhaust Fan & Speed Controller Low Noise Workshop 345 CFM Duct Fan for HVAC Ventilation Vent Booster Fan in Grow Tent Basement Bathroom Kitchen Attic 3D Printer**VIVOSUN**$32.52**4.3★6,092 rev](https://www.amazon.com/dp/B0DNSVKPYX) [3**AC Infinity CLOUDLINE PRO T6 Quiet 6 Inline Duct Fan with Temperature Humidity VPD Controller WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling Grow Tents Hydroponics**AC Infinity**$146.98**4.8★10,105 rev](https://www.amazon.com/dp/B074XBXFPD) [4**Hon&Guan 6 Inch Inline Booster Duct Fan with Speed Controller - 345 CFM Airflow with 19.2W Ultra-Low Power and Low Noise**Hon&Guan**$33.07**4.3★2,961 rev](https://www.amazon.com/dp/B0C7Z7PPBH) [5**VEVOR Inline Duct Fan 6-Inch 400 CFM with Variable Speed Controller Quiet AC-Motor Ventilation Exhaust Fan for Cooling Booster Grow Tents Hydroponics**VEVOR**$52.93**4.4★255 rev](https://www.amazon.com/dp/B0BV1PDNCX)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Toolazy 6 Inch Inline Booster Duct Fan with Speed Controller 345 CFM 19.2W EC Motor 3300RPM 0-100% Variable Speed 32dB Ultra-Quiet 118in Total Controller Cord Grow Tent HVAC Ventilation Fan**Toolazy**$25.21**26 rev5mo ago](https://www.amazon.com/dp/B0GLMKDJPF) [**6Inch Exhaust fan Pipeline booster fan Inline duct fan 420 CFM Efficiency Air Fan for Duct Vent Bathroom Kitchen Grow Tent Hydroponics The wind is very strong.All-copper wire motors are more durable**LEOKV**$59.12**55 rev1y ago](https://www.amazon.com/dp/B0DT149PX3) [**Hon&Guan 6 Inch Inline Duct Fan with Upgrade Controller - 345 CFM Airflow with 19.2W Ultra-Low Power and Low Noise**Hon&Guan**$34.57**119 rev1y ago](https://www.amazon.com/dp/B0DK5HCW92) [**VIVOSUN 6 Inline Exhaust Fan & Speed Controller Low Noise Workshop 345 CFM Duct Fan for HVAC Ventilation Vent Booster Fan in Grow Tent Basement Bathroom Kitchen Attic 3D Printer**VIVOSUN**$32.52**6,092 rev1y ago](https://www.amazon.com/dp/B0DNSVKPYX) [**Aydomer 6 Inch Inline Duct Fan with Switch Low Noise High Air Flow Extractor Fan Metal Exhaust Fan with Bracket and Mesh for Basement Garage Attic Kitchen(Black)**Aydomer**$27.45**56 rev1y ago](https://www.amazon.com/dp/B0DKK2Y8CB)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Toolazy 6 Inch Inline Booster Duct Fan with Speed Controller 345 CFM 19.2W EC Motor 3300RPM 0-100% Variable Speed 32dB Ultra-Quiet 118in Total Controller Cord Grow Tent HVAC Ventilation Fan**Toolazy**$25.21**3.7★**▲ 305%**](https://www.amazon.com/dp/B0GLMKDJPF) [**VIVOSUN G6 6 Inline Duct Fan & 3 Cycle Modes E12 Speed Controller AeroZesh Grow Tent Kit Ventilation Fan with 388 CFM EC Motor Programmable Exhaust Fan for Heating Cooling Booster Hydroponics**VIVOSUN**$63.65**4.6★**▲ 59%**](https://www.amazon.com/dp/B0C6QJVMD1) [**VIVOSUN 6 Inline Exhaust Fan & Speed Controller Low Noise Workshop 345 CFM Duct Fan for HVAC Ventilation Vent Booster Fan in Grow Tent Basement Bathroom Kitchen Attic 3D Printer**VIVOSUN**$32.52**4.3★**▲ 54%**](https://www.amazon.com/dp/B0DNSVKPYX) [**AC Infinity Air Filtration Kit 6 CLOUDLINE LITE Inline Fan and Carbon Filter Combo Cooling and Ventilation System for Grow Tents Hydroponics Indoor Gardening**AC Infinity**$206.81**4.7★**▲ 44%**](https://www.amazon.com/dp/B097NL4NM7) [**AC Infinity CLOUDLINE PRO S4 Quiet 4 Inline Duct Fan with Speed Controller EC Motor Ventilation Exhaust Fan for Heating Cooling Booster Grow Tents Hydroponics**AC Infinity**$85.93**4.7★**▲ 24%**](https://www.amazon.com/dp/B07JB292JC)
**~~View all trending →~~**
## **What buyers say about 6 inch inline fan**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“Excellent Product”*
**Value For Money**14%
*“Good price”*
**Assembly/Installation**10%
*“Easy to hookup”*
**Advertised Vs Actual Product**9%
*“Does exactly what it says”*
**Strength**5%
*“The clamps are quite sturdy and fancy looking”*
**Durability**5%
*“Working well after 2 weeks”*
**Noise Level**5%
*“not noisy”*
**Weight Light**3%
*“Not too heavy easy to instal”*
**Ease Of Use**3%
*“Easy to use”*
**Spray/Flow**3%
*“Air flow is good”*
### **What buyers complain about **
**Durability**22%
*“Disappointing performance and Durability”*
**Noise Level**12%
*“was way too loud”*
**Size-Overall**8%
*“SADLY didn't fit”*
**Functionality-Overall**5%
*“barely functional for its intended job”*
**Quality-Overall**5%
*“Disappointing performance and Durability”*
**Assembly/Installation**3%
*“the installation felt weird because you need to take out the middle bit to screw down the base”*
**Touch/Button Controls**3%
*“Why I don't have a choice of buttons on the machine”*
**Defective Material/Parts**3%
*“Parts missing”*
**Value For Money**2%
*“not have these type of issues otherwise there's a lot of less expensive option out there”*
**Strength**2%
*“so it's much weaker”*
### **Top return reasons **
**Size-Overall**42%
**Functionality-Overall**15%
**Advertised Vs Actual Product**9%
**Defective Material/Parts**5%
**Noise Level**5%
**Strength**3%
**Value For Money**3%
**Durability**3%
**Product Condition**2%
**Compatibility-Overall**2%
## **Common questions**
- **Is 6 inch inline fan profitable to sell on Amazon United States?**
- The niche generates $477K/yr across 23 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +3.2%. Flapen's verdict: Skip it (39/100).
- **How competitive is the 6 inch inline fan niche?**
- 9 brands and 14 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in 6 inch inline fan?**
- Top complaints mined from reviews: Durability, Noise Level, Size-Overall. The return rate is 4.6%.
- **When does demand for 6 inch inline fan peak?**
- Demand peaks in Dec; the busiest month runs 3.8× the quietest.
- **What does it cost to enter the 6 inch inline fan niche?**
- Listings span $25.21–$273.63; the average listing price is $84.55 (sweet spot $15–$100). The average incumbent carries 3,385 reviews — the moat a new listing must climb.
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