---
title: "24x24x4 Air Filter — $139K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/24x24x4-air-filter"
last_updated: "2026-08-08T11:48:43.676Z"
locale: en
meta:
description: "Niche score 50/100 · $139K/yr market · 14K searches/yr. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $139K/yr market · 14K searches/yr. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "24x24x4 Air Filter — $139K/yr Amazon US Niche (2026) - Flapen"
---
# **24x24x4 air filter**
**Worth a look**
Shows low returns (0.1%), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Market size 31Growth 50Conversion 95Competition 40Returns 99Price range 73Avg price 83Brand share 5Review moat 22Quality gap 35
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.6%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$77.51**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$11.12–$128.02**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+20.0%**
90-day search growth — must beat 0% to launch
**Competition**
**Okay****61%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$139K**
$139K/yr · 14K searches
**Review moat**
**Bad****9,126.41**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****98%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, 24x24x4 air filter is a $139K/yr Amazon United States market (14K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Jul. Verdict: Worth a look — 50/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **24x24x4 air filter market data**
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$116K–$155K**
- units × avg price
- **Conversion rate**
- **12.6%**
- **Avg BSR**
- **#277**
- **Page quality**
- **0%**
- **Prime**
- **18%**
- **Sponsored**
- **94%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **72 months**
- **Avg seller age**
- **205 days**
## **Competition & brand share**
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**6 **—flat
**Sellers**
**6**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**61%**
Top 20: 100%
**Open market**
**0%**
- Filterbuy56% - MANN+HUMMEL16% - Aerostar15% - Glasfloss9% - Simply2% - FilterTime2%
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +20.0% search growth over the last 90 days.
450350Spike '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Jul · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/24x24x4-air-filter/trend)
## **Top 24x24x4 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.
0%10%$14K20%$28K30%$42K40%$55K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Filterbuy 24x24x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 23.38 x 23.38 x 3.63)**Filterbuy**$54.20**4.6★68,921 rev](https://www.amazon.com/dp/B00CK027P4) [2**Aerostar 24x24x4 MERV 8 - 6 Count - High Efficiency Pleated HVAC Furnace & Air Conditioner Filters - Removes Dust Lint Mold & Allergy-Causing Pollen**Aerostar**$112.51**4.0★23 rev](https://www.amazon.com/dp/B01D94D85M) [3**Filterbuy 24x24x4 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 23.38 x 23.38 x 3.63)**Filterbuy**$63.27**4.5★20,405 rev](https://www.amazon.com/dp/B00CK04PY0) [4**Filterbuy 24x24x4 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 23.38 x 23.38 x 3.63)**Filterbuy**$71.34**4.5★159 rev](https://www.amazon.com/dp/B00CK06M9G) [5**MANN+HUMMEL 24x24x4 MERV 8 Pleated 4 AC Furnace Air Filter. Case of 6**MANN+HUMMEL**$101.38**5.0★2 rev](https://www.amazon.com/dp/B0CP9VTTGH)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**FilterTime 24x24x4 AC Furnace Air Filter MERV 8 1-Pack (exact dimensions 23.5 x 23.5 x 3.75) AC Filter Furnace Filter Home Air Filter Made in USA.**FilterTime**$26.53**12 rev4mo ago](https://www.amazon.com/dp/B0GTXCD9GB) [**Simply 24x24x4 Air Filter MERV 11 6 Pack Furnace Air Filter for HVAC (Actual Size: 23.5x23.5x3.63) DUST Pet & Allergy Control**Simply**$100.07**6,555 rev1y ago](https://www.amazon.com/dp/B0FTTZKB9Y) [**MANN+HUMMEL 24x24x4 MERV 8 Pleated 4 AC Furnace Air Filter. Case of 6**MANN+HUMMEL**$101.38**2 rev2y ago](https://www.amazon.com/dp/B0CP9VTTGH) [**MANN+HUMMEL 24x24x4 MERV 8 Pleated 4 AC Furnace Air Filter. 3 Pack**MANN+HUMMEL**$54.80**265 rev2y ago](https://www.amazon.com/dp/B0CP9VQ5J1) [**MANN+HUMMEL 24x24x4 MERV 8 Pleated 4 AC Furnace Air Filter. 2 Pack**MANN+HUMMEL**$43.19**437 rev2y ago](https://www.amazon.com/dp/B0C6VX6TQ4)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Simply 24x24x4 Air Filter MERV 11 6 Pack Furnace Air Filter for HVAC (Actual Size: 23.5x23.5x3.63) DUST Pet & Allergy Control**Simply**$100.07**4.6★**▲ 260%**](https://www.amazon.com/dp/B0FTTZKB9Y) [**FilterTime 24x24x4 AC Furnace Air Filter MERV 8 1-Pack (exact dimensions 23.5 x 23.5 x 3.75) AC Filter Furnace Filter Home Air Filter Made in USA.**FilterTime**$26.53**4.2★**▲ 186%**](https://www.amazon.com/dp/B0GTXCD9GB) [**Aerostar 24x24x4 MERV 8 High Efficiency Pleated Air Filter 4-Pack Electrostatic AC Furnace HVAC Replacement Captures Dust Pollen Pet Dander Mold Lint (23.375x23.375x3.75)**Aerostar**$11.12**4.2★**▲ 149%**](https://www.amazon.com/dp/B07F1YWPGS) [**Aerostar 24x24x4 MERV 8 - 6 Count - High Efficiency Pleated HVAC Furnace & Air Conditioner Filters - Removes Dust Lint Mold & Allergy-Causing Pollen**Aerostar**$112.51**4.0★**▲ 125%**](https://www.amazon.com/dp/B01D94D85M) [**Aerostar 24x24x4 MERV 11 - 6 Count - Pleated HVAC Furnace & Air Conditioner Filters - Removes Dust Cold & Flu Germs Lint Mold Pet Dander Allergy-Causing Pollen Smog & Smoke**Aerostar**$128.02**4.4★**▲ 91%**](https://www.amazon.com/dp/B01D94D8W0)
**~~View all trending →~~**
## **What buyers say about 24x24x4 air filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**42%
*“They fit well”*
**Filtration**33%
*“Easy Filter”*
**Value For Money**8%
*“Its great for the price”*
**Ease Of Cleaning**8%
*“keep things clean”*
### **What buyers complain about **
**Size-Overall**50%
*“they don't fit properly”*
### **Top return reasons **
**Size-Overall**79%
**Filtration**10%
**Defective Material/Parts**5%
**Thickness**3%
**Compatibility-Overall**2%
**Advertised Vs Actual Product**1%
## **Common questions**
- **Is 24x24x4 air filter profitable to sell on Amazon United States?**
- The niche generates $139K/yr across 17 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +20.0%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the 24x24x4 air filter niche?**
- 6 brands and 6 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in 24x24x4 air filter?**
- Top complaints mined from reviews: Size-Overall. The return rate is 0.1%.
- **When does demand for 24x24x4 air filter peak?**
- Demand peaks in Jul; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the 24x24x4 air filter niche?**
- Listings span $11.12–$128.02; the average listing price is $77.51 (sweet spot $15–$100). The average incumbent carries 9,126 reviews — the moat a new listing must climb.
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