4 Inch Carbon Filter
a small market ($55K/yr) — 4 Inch Carbon Filter doesn't clear our bar today.
Flapen Score
Ranks 7,974 of 8,839 Patio, Lawn & Garden niches · −16 vs the category median of 56
Is 4 Inch Carbon Filter profitable on Amazon?
According to Flapen's Amazon United States niche tracking, 4 Inch Carbon Filter is a $55K/yr Amazon United States market (22K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 40/100.
4 Inch Carbon Filter: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -12.1% over the last 90 days and 6.5% of searches end in a purchase.
$55K
revenue / yr
Who owns the niche?
The top 5 brands hold 90% of demand, so 10% of the market is open.
10%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.
0/100
page quality · 14 products
Top 4 Inch Carbon Filter products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 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
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 dateCarbon 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: brands, sellers & click share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.
Brands
9 falling
Sellers
11
Top-5 brand share
90%
Top 20: 100%
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%)
4 Inch Carbon Filter demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.5×
Top 4 Inch Carbon Filter search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- 4 inch carbon filter13K/yr
- 4 carbon filter6K/yr
- 4in carbon filter3K/yr
What reviews say buyers love and hate about 4 Inch Carbon Filter
What buyers mention most, as a share of all reviews.
What buyers love
91% of reviews“No odor”
“The quality is really good”
“Amazing value for the quality you get”
“Works as described”
“Good filter”
What buyers complain about
82% of reviews“so those chemical smells don't stand a chance of taking over the room”
“Not a big fan of the pre filters”
“Doesnt work once refilled”
“Garbage”
“Doesnt last long at all”
4 Inch Carbon Filter return rate & reasons
Why buyers send it back, as a share of all return requests.
2.4%
Return rate
62%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common 4 Inch Carbon Filter questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
