24x25x4 air filter
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible14.7%search→purchase rate — share of searches ending in a sale
Price range
Incredible$44.90–$99.69cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great1.4%return rate — above 5% kills the launch gate
Avg price
Great$66.37avg listing price — sweet spot $15–$100
Growth
Good+21.4%90-day search growth — must beat 0% to launch
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Bad$74K$74K/yr · 8K searches
Review moat
Bad18,573.25avg incumbent reviews — the moat a new listing must climb
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 24x25x4 air filter is a $74K/yr Amazon United States market (8K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
24x25x4 air filter market data
- Units sold / yr
- 1K–1K
- avg 250–500/product
- Revenue / yr
- $66K–$83K
- units × avg price
- Conversion rate
- 14.7%
- Avg BSR
- #319
- Page quality
- 0%
- Prime
- 25%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 89 months
- Avg seller age
- 218 days
Competition & brand share
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
4 flat
Sellers
16
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Filterbuy68%
- AIRx Filters14%
- Filter King13%
- Filtrete4%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 101 weeks — +21.4% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 1.6×
Top 24x25x4 air 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.
All 4 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Filterbuy 24x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 23.75 x 24.75 x 3.63)
Filterbuy$58.354.6★68,921 rev
AIRX FILTERS WICKED CLEAN AIR. 24x25x4 Air Filter MERV 11 Compatible with Carrier FILXXCAR0024 Furnace Filter 2 Pack
AIRx Filters$62.544.5★16 rev
Filter King 24x25x4 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 23.5 x 24.5 x 3.75)
Filter King$99.694.6★3,373 rev
Filtrete 20x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Honeywell & AprilAire AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 19.88 x 24.63 x 4.31 in)
Filtrete$44.904.7★1,983 rev
Newest
by launch dateAIRX FILTERS WICKED CLEAN AIR. 24x25x4 Air Filter MERV 11 Compatible with Carrier FILXXCAR0024 Furnace Filter 2 Pack
AIRx Filters$62.5416 rev
Filter King 24x25x4 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 23.5 x 24.5 x 3.75)
Filter King$99.693,373 rev
Filtrete 20x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Honeywell & AprilAire AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 19.88 x 24.63 x 4.31 in)
Filtrete$44.901,983 rev
Filterbuy 24x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 23.75 x 24.75 x 3.63)
Filterbuy$58.3568,921 rev
Trending
90-day click momentumAIRX FILTERS WICKED CLEAN AIR. 24x25x4 Air Filter MERV 11 Compatible with Carrier FILXXCAR0024 Furnace Filter 2 Pack
AIRx Filters$62.544.5★
Filterbuy 24x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement (Actual Size: 23.75 x 24.75 x 3.63)
Filterbuy$58.354.6★
Filter King 24x25x4 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 23.5 x 24.5 x 3.75)
Filter King$99.694.6★
Filtrete 20x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Honeywell & AprilAire AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 19.88 x 24.63 x 4.31 in)
Filtrete$44.904.7★
What buyers say about 24x25x4 air filter
What buyers praise and complain about, mined from review topics.What buyers love
“Good value for the money”
“Strong filter”
“The size is exact”
“No complaints”
“Easy”
“Met expectation”
“Super sturdy construction and caught so much dust from entering our ducts”
“Approved by furnace technician”
“A new one is really needed”
“Worked well for our systmen”
What buyers complain about
“Odd size”
“Very disappointed as Filtrate has always been my go to brand”
“for $10 less per filter”
“Amazon Resale came through”
“Not 4 it's 4 5/16 thick”
Top return reasons
Common questions
- Is 24x25x4 air filter profitable to sell on Amazon United States?
- The niche generates $74K/yr across 4 tracked products. 90-day search growth is +21.4%. Flapen's verdict: Skip it (41/100).
- How competitive is the 24x25x4 air filter niche?
- 4 brands and 16 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in 24x25x4 air filter?
- Top complaints mined from reviews: Size-Overall, Filtration, Value For Money. The return rate is 1.4%.
- When does demand for 24x25x4 air filter peak?
- Demand peaks in Jul; the busiest month runs 1.6× the quietest.
- What does it cost to enter the 24x25x4 air filter niche?
- Listings span $44.90–$99.69; the average listing price is $66.37 (sweet spot $15–$100). The average incumbent carries 18,573 reviews — the moat a new listing must climb.