4 Inch Carbon Filter
FailShoppers spend an estimated $55K a year here, so 4 Inch Carbon Filter is a Fail.
- Flapen Score
- 40 / 100Ranks 7,974 of 8,839 Patio, Lawn & Garden niches · −16 vs the category median of 5640
- Market size
- $55K/yr22K searches / yr
- 90-day growth
- -12.1%search demand this quarter
- Competition
- 73%top-5 click share · 9 brands · 11 sellers
Flapen Score
4 Inch Carbon Filter against its category
The dotted line is the Patio, Lawn & Garden average. Past it, 4 Inch Carbon Filter is stronger. Inside it, weaker.
Market
The 4 Inch Carbon Filter market on Amazon at a glance
Shoppers on Amazon United States searched for 4 Inch Carbon Filter 22K times last year and spent an estimated $55K. The top 5 brands take 90% of clicks. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 6.5% of those searches ended in a purchase.
Shoppers searched for this 22K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 6.5% of those searches ended in a purchase. Searches in the last 90 days moved -12.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $55K a year.
- Searches, last 12 months
- 22K
- Growth, 90 days vs prior 90
- -12.1%
- Conversion, latest week
- 6.5%
- Market size, estimated
- $55Ka year
- Peak month
- May1.5× the quietest month
- Top search term
- 4 inch carbon filter13K searches a year
02 · Price
A sale here is worth $39.03.
Listings sell for $39.03 on average, from $16.06 to $89.42. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 0 to 100 of them. At $39.03 that is $0 to $4K a year per listing.
- Average price
- $39.03inside the $15 to $100 sweet spot
- Price range
- $16.06–$89.42
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 0–100
- Revenue per listing a year
- $0–$4K
- Returns
- 2.4%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
79% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 11.1% of listings are out of stock. The average listing ranks #95 within Greenhouses & Plant Germination Equipment. It carries 2,023 reviews at 4.52 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 79%
- Prime listings
- 100%
- Out of stock, average day
- 11.1%
- Average rank
- #95in Greenhouses & Plant Germination Equipment
- Average rating
- 4.52 starsAmazon United States average 4.42 stars
- Average reviews
- 2,023per listing
- Listings tracked
- 14
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 50 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 50 months
Products
Top 4 Inch Carbon Filter products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
VIVOSUN 4 Inch Air Carbon Filter Smellines Control with Australia Virgin Charcoal for Inline Duct Fan Grow Tent Pre-filter Included Reversible Flange 4 x 12
- Price
- $38.04
- Rating
- 4.6/5
- Reviews
- 10,044
- Age
- 10y ago

vanleno 4inch Carbon Filter Odor Control with Australia Virgin Charcoal Two Prefilter 1 Pair Rope Hanger Included for Inline Duct Fan Grow Tent Hydroponics Odor Scrubber
- Price
- $30.35
- Rating
- 4.6/5
- Reviews
- 2,935
- Age
- 6y ago

MELONFARM 4 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal Carbon Filter for Grow Tent Inline Fan Hydroponics Pre-Filter Included Insulated Flange 4 x 11
- Price
- $28.79
- Rating
- 4.4/5
- Reviews
- 750
- Age
- 3y ago

ATOUR 4 Air Carbon Filter with Australian Virgin Charcoal Superior Odor Control for Grow Tent Smelliniss Scrubber Inline Fans Hydroponics. Includes Pre-Filter & Insulated Flange 4x11
- Price
- $28.14
- Rating
- 4.6/5
- Reviews
- 18
- Age
- 1y ago

AC Infinity Air Carbon Filter 4 with Premium Australian Virgin Charcoal for Inline Duct Fan Odor Control Hydroponics Grow Rooms
- Price
- $49.65
- Rating
- 4.8/5
- Reviews
- 10,224
- Age
- 7y ago
Trending
estimated 90-day click momentum
Carbon Filter 4 with Premium Australian Virgin Charcoal Grow Rooms Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics for Inline Duct Fan (Diameter 4 inches - Length 10 inches)
- Price
- $29.91
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 4mo ago

MELONFARM 4 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal for Grow Tent Inline Fan 8 Ducting Cooling & Vent Cover Included Insulated Flange 4 x 11
- Price
- $37.09
- Rating
- 4.1/5
- Reviews
- 8
- Age
- 1y ago

ATOUR 4 Air Carbon Filter with Australian Virgin Charcoal Superior Odor Control for Grow Tent Smelliniss Scrubber Inline Fans Hydroponics. Includes Pre-Filter & Insulated Flange 4x11
- Price
- $28.14
- Rating
- 4.6/5
- Reviews
- 18
- Age
- 1y ago

vanleno 4inch Carbon Filter Odor Control with Australia Virgin Charcoal Two Prefilter 1 Pair Rope Hanger Included for Inline Duct Fan Grow Tent Hydroponics Odor Scrubber
- Price
- $30.35
- Rating
- 4.6/5
- Reviews
- 2,935
- Age
- 6y ago

Spider Farmer 4 Inch Air Carbon Filrer Smelliness Control with Premium Australia Virgin Charcoal for Inline Duct Fan Grow Tent Odor Control Hydroponics Pre-Filter Included Reversible Flange
- Price
- $44.78
- Rating
- 4.4/5
- Reviews
- 401
- Age
- 4y ago
Newest
by launch date
Carbon Filter 4 with Premium Australian Virgin Charcoal Grow Rooms Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics for Inline Duct Fan (Diameter 4 inches - Length 10 inches)
- Price
- $29.91
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 4mo ago

ATOUR 4 Air Carbon Filter with Australian Virgin Charcoal Superior Odor Control for Grow Tent Smelliniss Scrubber Inline Fans Hydroponics. Includes Pre-Filter & Insulated Flange 4x11
- Price
- $28.14
- Rating
- 4.6/5
- Reviews
- 18
- Age
- 1y ago

ATOUR 4 Inch Air Carbon Filter with Australian Virgin Charcoal Odor Control. Built-in 5.5 Quiet Fan with Speed Control for Inline Duct Fans & Grow Tents. Includes Vent Cover + Pre-Filter 4x13.4
- Price
- $41.45
- Rating
- 4.2/5
- Reviews
- 63
- Age
- 1y ago

MELONFARM 4 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal for Grow Tent Inline Fan 8 Ducting Cooling & Vent Cover Included Insulated Flange 4 x 11
- Price
- $37.09
- Rating
- 4.1/5
- Reviews
- 8
- Age
- 1y ago

AC Infinity Refillable Carbon Filter Kit 4 with Additional Refill Odor Removal Air Scrubber For 4 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics
- Price
- $89.42
- Rating
- 4.7/5
- Reviews
- 495
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 73% of clicks. A locked shelf that new listings rarely crack.
Brands
9 falling
Sellers
11
Est. top-5 brand share
90%
Top 20: 100%
Est. top-5 click share
73%
Top 20: 100%
Open market
6%
- VIVOSUN33%
- vanleno18%
- MELONFARM14%
- ATOUR13%
- AC Infinity12%
- HYDROWE4%
- Open — no brand owns it (3 brands, 6%)
Demand
4 Inch Carbon Filter search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top 4 Inch Carbon Filter search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- 4 inch carbon filter13K/yr
- 4 carbon filter6K/yr
- 4in carbon filter3K/yr
Reviews and returns
What reviews say buyers love and hate about 4 Inch Carbon Filter
We read the reviews and the return reasons for every product selling here.
“so those chemical smells don't stand a chance of taking over the room”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 4 Inch Carbon Filter questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









