---
title: "18x24x1 Air Filter — $1.8M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/18x24x1-air-filter"
last_updated: "2026-08-08T06:58:29.590Z"
locale: en
meta:
description: "Niche score 60/100 · $1.8M/yr market · 350K searches/yr · $39.78 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 60/100 · $1.8M/yr market · 350K searches/yr · $39.78 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "18x24x1 Air Filter — $1.8M/yr Amazon US Niche (2026) - Flapen"
---
# **18x24x1 air filter**
**Launch it**
A $1.8M/yr market growing +40.3% this quarter with returns at 0.5% — clears our launch bar.
Market size 92Growth 63Conversion 96Competition 26Returns 97Price range 95Avg price 95Brand share 0Review moat 12Quality gap 38
**Returns**
**Incredible****0.5%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****13.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$39.78**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$21.89–$53.24**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Great****$1.8M**
$1.8M/yr · 350K searches
**Growth**
**Good****+40.3%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****69%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****27,160.94**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 18x24x1 air filter is a $1.8M/yr Amazon United States market (350K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Launch it — 60/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **18x24x1 air filter market data**
- **Units sold / yr**
- **40K–50K**
- avg 2,000–2,500/product
- **Revenue / yr**
- **$1.6M–$2.0M**
- units × avg price
- **Conversion rate**
- **13.3%**
- **Avg BSR**
- **#34**
- **Page quality**
- **0%**
- **Prime**
- **63%**
- **Sponsored**
- **75%**
- **Out of stock**
- **4.0%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **178 days**
## **Competition & brand share**
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**5 **▼falling
**Sellers**
**28**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**69%**
Top 20: 100%
**Open market**
**0%**
- Filtrete56% - Filterbuy29% - Simply10% - TRIGHTFILTERS3% - BNX1%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +40.3% search growth over the last 90 days.
10K6KSpike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jun, Jul, Aug · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/18x24x1-air-filter/trend)
## **Top 18x24x1 air filter search terms**
- **18x24x1 air filter**173K/yr+46.3%12.7% conv. - **air filter 18x24x1**37K/yr+24.3%14.2% conv. - **ac filter 18x24x1**21K/yr+60.4%13.2% conv. - **18 x 24 x 1 air filters for home**16K/yr+9.4%13.9% conv. - **18x24x1 air filter 6 pack**13K/yr+41.4%14.3% conv. - **air filters 18x24x1**10K/yr+27.8%16.3% conv. - **ac filters 18x24x1**7K/yr+57.8%11.4% conv. - **18x24x1**8K/yr+17.6%12.9% conv. - **18 24 1 air filter**8K/yr+8.3%11.3% conv. - **furnace filters 18x24x1**7K/yr+25.6%6.0% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/18x24x1-air-filter/search-terms)
## **Top 18x24x1 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%$185K20%$369K30%$554K40%$738K1001K10K100K1.0M Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Filtrete 18x24x1 Air Filter MERV 5 6-Pack AC Furnace HVAC Filters for Home MPR 300 Basic Dust Defense Pleated Electrostatic Removes Lint & Dust (Actual Size 17.81x23.81x0.81 in)**Filtrete**$34.28**4.7★160,547 rev](https://www.amazon.com/dp/B07FNW9WZ1) [2**Filtrete 18x24x1 Air Filter MERV 11 MPR 1000 Allergens & Pet Dander 3-Month AC and Furnace Filters Cleaner Air Reliable Airflow 2 HVAC Filters (Actual Size 17.68 x 23.68 x 0.81 in)**Filtrete**$21.89**4.8★57,731 rev](https://www.amazon.com/dp/B07CTPTG7Z) [3**Filterbuy 18x24x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.38 x 23.38 x 0.75)**Filterbuy**$37.39**4.5★3,680 rev](https://www.amazon.com/dp/B00CJZ8EKW) [4**Simply 18x24x1 Air Filter Merv 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 17.75x23.75x0.75) DUST Pet & Allergy Control**Simply**$42.11**4.7★53,363 rev](https://www.amazon.com/dp/B09RHM8WVX) [5**Filterbuy 18x24x1 Air Filter MERV 8 Essential Dust & Allergy Defense (6-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.38 x 23.38 x 0.75)**Filterbuy**$42.97**4.7★51,098 rev](https://www.amazon.com/dp/B00CK01ZBQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Filtrete 18x24x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 6-Pack (Actual Size 17.81 x 23.81 x 0.81 in)**Filtrete**$53.24**627 rev1y ago](https://www.amazon.com/dp/B0F9LR5CGP) [**Filtrete 18x24x1 Air Filter 3M MERV 1 HVAC AC Furnace Filter Replacement 6-Pack (Actual Size 17.81x23.81x0.88 in)**Filtrete**$34.89**249 rev1y ago](https://www.amazon.com/dp/B0D96SVNZS) [**TRIGHTFILTERS 18x24x1 Air Filter 4 Pack MERV 8 Pleated Dust Defense Air Filters Replacement for Air Conditioner & Furnace Durable & Lightweight**TRIGHTFILTERS**$33.88**1,900 rev2y ago](https://www.amazon.com/dp/B0D5MGPX39) [**BNX TruFilter 18x24x1 Air Filter MERV 8 (6-Pack) - MADE IN USA Dust & Pet Defense Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Dust Pet Mold Pollen MPR 600 700 & FPR 5**BNX**$44.48**189 rev2y ago](https://www.amazon.com/dp/B0CLBC945V) [**Simply 18x24x1 Air Filter Merv 8 4 Pack For Home AC Furnace & HVAC (Actual Size: 17.75x23.75x0.75) DUST Pet & Allergy Control**Simply**$31.62**5,182 rev3y ago](https://www.amazon.com/dp/B0BW14M88F)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Simply 18x24x1 Air Filter Merv 8 4 Pack For Home AC Furnace & HVAC (Actual Size: 17.75x23.75x0.75) DUST Pet & Allergy Control**Simply**$31.62**4.6★**▲ 146%**](https://www.amazon.com/dp/B0BW14M88F) [**Filtrete 18x24x1 Air Filter MERV 11 MPR 1000 Allergens & Pet Dander 3-Month AC and Furnace Filters Cleaner Air Reliable Airflow 2 HVAC Filters (Actual Size 17.68 x 23.68 x 0.81 in)**Filtrete**$21.89**4.8★**▲ 43%**](https://www.amazon.com/dp/B07CTPTG7Z) [**Filtrete 18x24x1 Air Filter MERV 11 MPR 1000 Allergens & Pet Dander 3-Month AC and Furnace Filters Cleaner Air Reliable Airflow 4 HVAC Filters (Actual Size 17.68 x 23.68 x 0.81 in)**Filtrete**$48.26**4.8★**▲ 36%**](https://www.amazon.com/dp/B005GZ8WIG) [**TRIGHTFILTERS 18x24x1 Air Filter 4 Pack MERV 8 Pleated Dust Defense Air Filters Replacement for Air Conditioner & Furnace Durable & Lightweight**TRIGHTFILTERS**$33.88**4.7★**▲ 25%**](https://www.amazon.com/dp/B0D5MGPX39) [**Filtrete 18x24x1 Air Filter MERV 13 MPR 1900 Allergens Bacteria Viruses & Air Pollutants 3-Month AC/Furnace Filters Cleaner Air Reliable Airflow 2 HVAC Filters(Act Size 17.81x23.81x0.78 in)**Filtrete**$42.13**4.8★**▲ 18%**](https://www.amazon.com/dp/B07CTFQ9R6)
**~~View all trending →~~**
## **What buyers say about 18x24x1 air filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**25%
*“Fit fine”*
**Value For Money**22%
*“Great Value”*
**Filtration**22%
*“Filtration properties seem adequate”*
**Quality-Overall**11%
*“are a good value per piece”*
**Advertised Vs Actual Product**2%
*“As expected”*
**Durability**2%
*“It last a great while before changing out”*
**Ease Of Cleaning**2%
*“the back side seemed completly clean showing that they indeed did stop most particulates”*
**Strength**1%
*“they are not flimsy like other inexpensive filters I've tried”*
**Ease Of Use**1%
*“Easy”*
**Material Quality**1%
*“Appear to be of high-quality materials”*
### **What buyers complain about **
**Size-Overall**67%
*“Does not fit”*
**Filtration**13%
*“Filter runs small”*
**Advertised Vs Actual Product**6%
*“Misleading”*
**Quality-Overall**2%
*“Poor quality”*
**Value For Money**2%
*“Wasted 41 dollars on filter that does not fit”*
**Allergies**1%
*“Need an allergen filter”*
**Noise Level**1%
*“Makes a whistle sound as the air passes by”*
**Compatibility-Overall**1%
*“will not fit my system”*
**Strength**1%
*“Very flimsy”*
**Natural Resource Wastage**1%
*“Wasted money”*
### **Top return reasons **
**Size-Overall**76%
**Filtration**10%
**Compatibility-Overall**7%
**Value For Money**2%
**Advertised Vs Actual Product**1%
**Defective Material/Parts**1%
**Quality-Overall**1%
**Certifications**1%
**Maintenance And Repair**0%
**Functionality-Overall**0%
## **Common questions**
- **Is 18x24x1 air filter profitable to sell on Amazon United States?**
- The niche generates $1.8M/yr across 16 tracked products. 90-day search growth is +40.3%. Flapen's verdict: Launch it (60/100).
- **How competitive is the 18x24x1 air filter niche?**
- 5 brands and 28 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in 18x24x1 air filter?**
- Top complaints mined from reviews: Size-Overall, Filtration, Advertised Vs Actual Product. The return rate is 0.5%.
- **When does demand for 18x24x1 air filter peak?**
- Demand peaks in Jun–Jul–Aug; the busiest month runs 2.2× the quietest.
- **What does it cost to enter the 18x24x1 air filter niche?**
- Listings span $21.89–$53.24; the average listing price is $39.78 (sweet spot $15–$100). The average incumbent carries 27,161 reviews — the moat a new listing must climb.
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