20x25x4 air filter merv 13
Worth a lookShows low returns (1.0%), but brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list.
Returns
Great1.0%return rate — above 5% kills the launch gate
Conversion
Great9.3%search→purchase rate — share of searches ending in a sale
Avg price
Great$76.70avg listing price — sweet spot $15–$100
Growth
Good+50.5%90-day search growth — must beat 0% to launch
Price range
Good$47.81–$126.13cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$189K$189K/yr · 26K searches
Review moat
Bad4,488.54avg incumbent reviews — the moat a new listing must climb
Competition
Bad78%top-5 click share — a locked-up shelf
Brand share
Bad94%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 20x25x4 air filter merv 13 is a $189K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Jul. Verdict: Worth a look — 52/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
20x25x4 air filter merv 13 market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $153K–$192K
- units × avg price
- Conversion rate
- 9.3%
- Avg BSR
- #234
- Page quality
- 0%
- Prime
- 69%
- Sponsored
- 69%
- Out of stock
- 0.0%
- Avg brand age
- 50 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 flat
Sellers
43
Top-5 brand share
94%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
4%
- Filterbuy42%
- Filtrete28%
- Simply10%
- BNX9%
- Aprilaire4%
- Oleergl2%
- Open — no brand owns it (3 brands, 4%)
Demand & seasonality
Weekly Amazon search volume, last 103 weeks — +50.5% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 2.4×
Top 20x25x4 air filter merv 13 search terms
- 20x25x4 air filter merv 1315K/yr
- merv 13 20x25x47K/yr
- 20x25x4 merv 134K/yr
Top 20x25x4 air filter merv 13 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Filterbuy 20x25x4 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
Filterbuy$59.344.2★2,331 rev
Filtrete 20x25x4 AC Furnace Air Filter MERV 13 MPR 1900 Premium Allergen Bacteria & Virus Filter Electrostatic Air Cleaning Filter 2-Pack (Actual Size 19.75 x 24.62 x 4.31 in)
Filtrete$71.364.3★379 rev
Filterbuy 20x25x4 Air Filter MERV 13 Optimal Smoke & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 19.50 x 24.50 x 3.63)
Filterbuy$96.434.6★21,899 rev
BNX TruFilter 20x25x4 (19.5 x 24.5 x 3.63 Slim Fit) MERV 13 Air Filter (2-Pack) - MADE IN USA - Air Conditioner HVAC AC Furnace Filters Health Allergies Mold Bacteria Smoke MPR 1900 FPR 10
BNX$61.454.4★629 rev
Filtrete 20x25x4 Air Filter MERV 12 MPR 1550 Certified Asthma & Allergy Friendly 2-Pack Fits Honeywell & AprilAire AC Furnace HVAC Filters Pleated Electrostatic (Actual Size 19.88x24.63x4.31 in)
Filtrete$49.684.6★5,199 rev
Newest
by launch date
Filter King 20x25x4 Air Filter (MERV 13) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 19.5 x 24.5 x 3.75)
Filter King$126.13159 rev
2Pack 20x25x4 AC Furnace Air Filter Compatible with Honeywell FC100A1037 MERV 13 HVAC Filter Replacement Actual Size:19.94x24.86x4.38
Oleergl$47.814 rev
Filtrete 20x25x4 (SlimFit) AC Furnace Air Filter MERV 13 MPR 1900 Premium Allergen Bacteria & Virus Electrostatic Air Cleaning Filter 2-Pack (Actual Size 19.5x24.5x3.75 in)
Filtrete$79.30379 rev
Simply 20x25x4 Air Filter MERV 13 6 Pack Furnace Air Filter for HVAC (Actual Size:19.5x24.5x3.63) DUST Pet & Allergy Control
Simply$101.833,094 rev
Simply 20x25x4 Air Filter MERV 13 4 Pack Furnace Air Filter for HVAC (Actual Size:19.5x24.5x3.63) DUST Pet & Allergy Control
Simply$80.71532 rev
Trending
90-day click momentum2Pack 20x25x4 AC Furnace Air Filter Compatible with Honeywell FC100A1037 MERV 13 HVAC Filter Replacement Actual Size:19.94x24.86x4.38
Oleergl$47.814.3★
Filter King 20x25x4 Air Filter (MERV 13) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 19.5 x 24.5 x 3.75)
Filter King$126.134.6★
Filtrete 20x25x4 (SlimFit) AC Furnace Air Filter MERV 13 MPR 1900 Premium Allergen Bacteria & Virus Electrostatic Air Cleaning Filter 2-Pack (Actual Size 19.5x24.5x3.75 in)
Filtrete$79.304.3★
Simply 20x25x4 Air Filter MERV 13 4 Pack Furnace Air Filter for HVAC (Actual Size:19.5x24.5x3.63) DUST Pet & Allergy Control
Simply$80.714.3★
AIRX FILTERS WICKED CLEAN AIR. 20x25x4 Compatible Replacement for Honeywell 20x25x4 Air Filter MERV 13 HVAC AC Furnace FC100A1037 2-Pack of Filters
AIRx Filters$72.544.5★
What buyers say about 20x25x4 air filter merv 13
What buyers praise and complain about, mined from review topics.What buyers love
“Strong filter”
“Great deal”
“It fit in the furnace perfectly”
“Reliable product and will continue to purchase as needed”
“As advertised”
“Easy”
“Sturdy”
“Easy Install”
“A new one is really needed”
“Approved by furnace technician”
What buyers complain about
“DOES NOT FIT”
“will not work since unfiltered air will just get flow thru”
“Yes there are cheaper options”
“Not quite 4 thick”
“Quality control is not the best. for a brand name”
“This lack of clarity on the product makes me highly skeptical of the stated MERV ratings for these generic brands”
“Not very well built”
“Glued improperly and all stuck together”
“The second day I installed this filter the house start smelling horrible can describe it”
“NO MERV RATING LISTED”
Top return reasons
Common questions
- Is 20x25x4 air filter merv 13 profitable to sell on Amazon United States?
- The niche generates $189K/yr across 13 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +50.5%. Flapen's verdict: Worth a look (52/100).
- How competitive is the 20x25x4 air filter merv 13 niche?
- 9 brands and 43 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 94% of demand.
- What do buyers complain about in 20x25x4 air filter merv 13?
- Top complaints mined from reviews: Size-Overall, Filtration, Value For Money. The return rate is 1.0%.
- When does demand for 20x25x4 air filter merv 13 peak?
- Demand peaks in Jul; the busiest month runs 2.4× the quietest.
- What does it cost to enter the 20x25x4 air filter merv 13 niche?
- Listings span $47.81–$126.13; the average listing price is $76.70 (sweet spot $15–$100). The average incumbent carries 4,489 reviews — the moat a new listing must climb.