---
title: "4 Inch Vent Cover — $114K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/appliances/4-inch-vent-cover"
last_updated: "2026-08-07T22:38:43.214Z"
locale: en
meta:
description: "Niche score 52/100 · $114K/yr market · 193K searches/yr · $15.14 avg price. A small market ($114K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $114K/yr market · 193K searches/yr · $15.14 avg price. A small market ($114K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "4 Inch Vent Cover — $114K/yr Amazon US Niche (2026) - Flapen"
---
# **4 inch vent cover**
**Worth a look**
Shows a fragmented shelf (top 5 take 39% of clicks), but a small market ($114K/yr) keeps it on the watch list.
Market size 27Growth 45Conversion 49Competition 76Returns 37Price range 76Avg price 75Brand share 72Review moat 46Quality gap 42
**Competition**
**Great****39%**
top-5 click share — an open shelf
**Price range**
**Great****$6.18–$42.43**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$15.14**
avg listing price — sweet spot $15–$100
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Okay****3.9%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,931.02**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+15.6%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Returns**
**Okay****4.1%**
return rate — above 5% kills the launch gate
**Market size**
**Okay****$114K**
$114K/yr · 193K searches
According to Flapen's Amazon United States niche tracking, 4 inch vent cover is a $114K/yr Amazon United States market (193K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Jun–Nov. Verdict: Worth a look — 52/100.
Data updated Jul 5, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **4 inch vent cover market data**
- **Units sold / yr**
- **8K–10K**
- avg 100–250/product
- **Revenue / yr**
- **$121K–$151K**
- units × avg price
- **Conversion rate**
- **3.9%**
- **Avg BSR**
- **#224**
- **Page quality**
- **0%**
- **Prime**
- **98%**
- **Sponsored**
- **90%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.
**Brands**
**28 **▲rising
**Sellers**
**70**
**Top-5 brand share**
**62%**
Top 20: 93%
**Top-5 click share**
**39%**
Top 20: 78%
**Open market**
**35%**
- Deflecto29% - Funmit12% - Hon&Guan8% - no-pest vent7% - Hydencamm5% - Zhanmai4%
## **Demand & seasonality**
Weekly Amazon search volume, last 108 weeks — +15.6% search growth over the last 90 days.
4K3KSpike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jun, Nov · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/appliances/4-inch-vent-cover/trend)
## **Top 4 inch vent cover search terms**
- **vent covers for outside**15K/yr+52.4%2.4% conv. - **metal dryer vent cover**14K/yr+8.8%2.3% conv. - **deflecto dryer vent cover**12K/yr+35.4%6.9% conv. - **exterior vent covers**16K/yr+15.4%0.9% conv. - **4 inch vent cover**17K/yr+17.8%3.1% conv. - **outside vent covers for house**13K/yr+26.1%2.3% conv. - **dryer vent flap**13K/yr+16.0%3.1% conv. - **exterior vent covers for house**9K/yr+17.3%2.5% conv. - **outdoor vent covers for house**11K/yr-1.5%2.0% conv. - **4 vent cover**8K/yr-16.8%3.1% conv. [**All search terms **](https://flapen.com/research/us/appliances/4-inch-vent-cover/search-terms)
## **Top 4 inch vent cover 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%4%$5K8%$9K12%$14K16%$18K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Deflecto Outdoor Dryer Vent Cover 4-Inch with Louvered Gravity Damper White**Deflecto**$7.53**4.6★12,390 rev](https://www.amazon.com/dp/B00R1X7S5Y) [2**4 Inch Outdoor Dryer Vent Cover Louvered with Screen for Exterior Wall**Funmit**$12.64**4.3★4,528 rev](https://www.amazon.com/dp/B08LPJT3NP) [3**no-pest vent Dual Door Dryer Vent Cover Outdoor 4 inch Made in USA w Highest Quality UV Resistant Plastic in any Outdoor Vent Cover No Lint Collecting Screen White**no-pest vent**$16.41**4.4★1,698 rev](https://www.amazon.com/dp/B0CCF7DGDS) [4**Hon&Guan Soffit Vent 4 Inch with Built-in Fly Screen White 1 Pack**Hon&Guan**$9.53**4.6★2,185 rev](https://www.amazon.com/dp/B077HJD87S) [5**Hydencamm 4 Metal Dryer Vent Cover for Exterior Wall Stainless Steel**Hydencamm**$19.69**4.6★816 rev](https://www.amazon.com/dp/B0BYMSZ5T5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**4 Inch Dryer Vent Cover Outside Stainless Steel Exterior Vent Cover - Weatherproof Rustproof High Temp Resistant for House Wall Range Hood & AC Opening Diameter: 3.8 (Silvery)**EOEDEPAZ**$17.06**70 rev7mo ago](https://www.amazon.com/dp/B0G2YJ9JF3) [**Houseluxe Dryer Vent Cover Outside 4 inch Magnetic Door Design Durable Airflow Vent with Lint Trap Screen Thickened Material 6 inch x 6 inch Size White**Houseluxe**$12.28**345 rev8mo ago](https://www.amazon.com/dp/B0FX9GS1H9) [**4 Dryer Vent Cover with Screen Plastic Dryer Vent Hood for Exterior Wall**HOXHA**$6.27**254 rev11mo ago](https://www.amazon.com/dp/B0FK9DLBLP) [**Hon&Guan Soffit Vent 4 Inch with Built-in Fly Screen for Home Black 1 Pack**Hon&Guan**$10.06**2,185 rev1y ago](https://www.amazon.com/dp/B0FDG4CX2B) [**4-Pack Dryer Vent Cover Replacement with Enhanced Rippled Design - Premium Plastic Polymer Dryer Exhaust Vent Cover Replacements Weather Resistant Exterior Dryer Vent Flap Replacement (White)**Rolitwils**$10.20**154 rev1y ago](https://www.amazon.com/dp/B0FH6HLC5H)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Deflecto Bird Guard Outdoor Vent Cover Fits 3-4 Inch Vent Hoods Black**Deflecto**$10.15**4.5★**▲ 151%**](https://www.amazon.com/dp/B0DH8B8B4F) [**FRESH SPEED 4 Inch Black Dryer Vent Cover Outside Stainless Steel Wall Vent with Removable Cover and Insect Screen Mesh RAL9011**FRESH SPEED**$29.58**4.5★**▲ 148%**](https://www.amazon.com/dp/B0DB5LDRN3) [**Houseluxe Dryer Vent Cover Outside 4 inch Magnetic Door Design Durable Airflow Vent with Lint Trap Screen Thickened Material 6 inch x 6 inch Size White**Houseluxe**$12.28**4.6★**▲ 131%**](https://www.amazon.com/dp/B0FX9GS1H9) [**4 Inch Dryer Vent Cover Outside Stainless Steel Exterior Vent Cover - Weatherproof Rustproof High Temp Resistant for House Wall Range Hood & AC Opening Diameter: 3.8 (Silvery)**EOEDEPAZ**$17.06**4.6★**▲ 107%**](https://www.amazon.com/dp/B0G2YJ9JF3) [**2pcs Attic Vent Soffit Vent Aluminum Wall Vent Metal Shed Vent Square Vent Louver Vent Grille with Built-in Insect Screen for Exterior Door House Attic Garage Ceiling (Black 6 x 6-2 Pack)**TVKJHG**$12.84**4.5★**▲ 91%**](https://www.amazon.com/dp/B0DNJV45MN)
**~~View all trending →~~**
## **What buyers say about 4 inch vent cover**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**22%
*“Excellent fit”*
**Quality-Overall**21%
*“the quality is consistent throughout”*
**Advertised Vs Actual Product**11%
*“Exactly as pictured”*
**Value For Money**9%
*“Great value”*
**Design-Overall**4%
*“Excellent design”*
**Assembly/Installation**4%
*“Easy install”*
**Durability**3%
*“Pros: Durable material”*
**Strength**3%
*“Solid Construction”*
**Ease Of Use**3%
*“Easy”*
**Ease Of Cleaning**3%
*“Also removes easily for cleaning”*
### **What buyers complain about **
**Size-Overall**21%
*“Too small”*
**Quality-Overall**9%
*“Bad Quality”*
**Jamming/Clogging**4%
*“It gets clogged”*
**Assembly/Installation**4%
*“Need to install however not pleased no screws sent”*
**Material Quality**4%
*“Kind of cheap made”*
**Strength**3%
*“both became brittle”*
**Durability**3%
*“The screen fell off with first use”*
**Ease Of Cleaning**3%
*“is really hard to clean lint out of”*
**Mounting**3%
*“The included screws weren't long enough for our particular mount”*
**Advertised Vs Actual Product**2%
*“False advertising”*
### **Top return reasons **
**Size-Overall**73%
**Advertised Vs Actual Product**4%
**Functionality-Overall**4%
**Compatibility-Overall**4%
**Defective Material/Parts**3%
**Material Quality**2%
**Value For Money**2%
**Color**1%
**Quality-Overall**1%
**Assembly/Installation**1%
## **Common questions**
- **Is 4 inch vent cover profitable to sell on Amazon United States?**
- The niche generates $114K/yr across 41 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +15.6%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the 4 inch vent cover niche?**
- 28 brands and 70 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in 4 inch vent cover?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Jamming/Clogging. The return rate is 4.1%.
- **When does demand for 4 inch vent cover peak?**
- Demand peaks in Jun–Nov; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the 4 inch vent cover niche?**
- Listings span $6.18–$42.43; the average listing price is $15.14 (sweet spot $15–$100). The average incumbent carries 1,931 reviews — the moat a new listing must climb.
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