---
title: "12x18x1 Air Filter — $101K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/12x18x1-air-filter"
last_updated: "2026-08-08T06:57:27.660Z"
locale: en
meta:
description: "Niche score 48/100 · $101K/yr market · 35K searches/yr · $37.21 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · $101K/yr market · 35K searches/yr · $37.21 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "12x18x1 Air Filter — $101K/yr Amazon US Niche (2026) - Flapen"
---
# **12x18x1 air filter**
**Skip it**
A concentrated shelf (top 5 take 79% of clicks) — this niche doesn't clear our bar today.
Market size 25Growth 64Conversion 78Competition 18Returns 96Price range 81Avg price 95Brand share 23Review moat 20Quality gap 22
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$37.21**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$5.40–$59.53**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****7.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Good****+42.5%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****$101K**
$101K/yr · 35K searches
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****12,662.88**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****79%**
top-5 click share — a locked-up shelf
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United States niche tracking, 12x18x1 air filter is a $101K/yr Amazon United States market (35K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Jun–Jul. Verdict: Skip it — 48/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **12x18x1 air filter market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$112K–$149K**
- units × avg price
- **Conversion rate**
- **7.8%**
- **Avg BSR**
- **#932**
- **Page quality**
- **0%**
- **Prime**
- **44%**
- **Sponsored**
- **63%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **71 months**
- **Avg seller age**
- **191 days**
## **Competition & brand share**
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▲rising
**Sellers**
**24**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**79%**
Top 20: 100%
**Open market**
**6%**
- Komashr33% - Filterbuy25% - Simply15% - Filtrete15% - AIRx Filters3% - Chenzhit3% - Open — no brand owns it (5 brands, 6%)
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +42.5% search growth over the last 90 days.
1K600Spike '24Spike '25Prime Day '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Jun, Jul · busiest ÷ quietest = 2.4×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/12x18x1-air-filter/trend)
## **Top 12x18x1 air filter search terms**
- **12x18x1 air filter**18K/yr+33.3%8.9% conv. - **air filter 12x18x1**6K/yr+53.8%6.4% conv. - **furnace filters 12x18x1**4K/yr+66.3%1.0% conv. - **12x18x1 furnace filter**4K/yr+44.1%1.1% conv. - **12x18 air filter**3K/yr+48.3%14.5% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/12x18x1-air-filter/search-terms)
## **Top 12x18x1 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%$10K20%$20K30%$30K40%$41K1101001K10K100K 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**Komashr 12x18x1 Air Filter MERV 8 (4-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$29.33**4.8★118 rev](https://www.amazon.com/dp/B0G3P6YG3H) [2**Filterbuy 12x18x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 11.50 x 17.50 x 0.75)**Filterbuy**$37.74**4.6★604 rev](https://www.amazon.com/dp/B00CJZ7LE2) [3**Simply 12x18x1 Air Filter Merv 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 11.75x17.75x0.75) DUST Pet & Allergy Control**Simply**$41.75**4.7★53,363 rev](https://www.amazon.com/dp/B0BWPHG6RP) [4**Filtrete 12x18x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 2-Pack (Actual Size 11.81 x 17.81 x 0.81 in)**Filtrete**$26.16**4.7★740 rev](https://www.amazon.com/dp/B0F9LRGQZ1) [5**Komashr 12x18x1 Air Filter MERV 8 (6-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$38.73**4.4★23 rev](https://www.amazon.com/dp/B0G3PB95WL)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Hearthhub 12181 MERV 8 Furnace Air Filters - HVAC/Furnace AC Filter Replacement (Actual Size 11.75x17.75x0.75) - Pleated Dust Defense Air Filters for Home Office (2 Pack)**Hearthhub**$25.35**21 rev3mo ago](https://www.amazon.com/dp/B0GXV3KS9H) [**(6 Pack) 12x18x1 Air Filter MPR 1900 & FPR 10 MERV 13 Pleated Air Filter (Actual Size:11 3/4x17 3/4x3/4 inch)**Chenzhit**$38.77**647 rev4mo ago](https://www.amazon.com/dp/B0GV45C766) [**Komashr 12x18x1 Air Filter MERV 8 (4-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$29.33**118 rev6mo ago](https://www.amazon.com/dp/B0G3P6YG3H) [**Komashr 12x18x1 Air Filter MERV 8 (6-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$38.73**23 rev6mo ago](https://www.amazon.com/dp/B0G3PB95WL) [**Pro - Source 12x18x1 Pleated Air Filter Wireless Pleated MERV 8 Synthetic Clay Coated Paper Board Frame 500 FPM 563 CFM Use with Any Unit**PRO SOURCE**$5.40**1 rev1y ago](https://www.amazon.com/dp/B0FDBLL947)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**(6 Pack) 12x18x1 Air Filter MPR 1900 & FPR 10 MERV 13 Pleated Air Filter (Actual Size:11 3/4x17 3/4x3/4 inch)**Chenzhit**$38.77**4.7★**▲ 247%**](https://www.amazon.com/dp/B0GV45C766) [**Hearthhub 12181 MERV 8 Furnace Air Filters - HVAC/Furnace AC Filter Replacement (Actual Size 11.75x17.75x0.75) - Pleated Dust Defense Air Filters for Home Office (2 Pack)**Hearthhub**$25.35**4.8★**▲ 241%**](https://www.amazon.com/dp/B0GXV3KS9H) [**Komashr 12x18x1 Air Filter MERV 8 (4-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$29.33**4.8★**▲ 150%**](https://www.amazon.com/dp/B0G3P6YG3H) [**Komashr 12x18x1 Air Filter MERV 8 (6-Pack) HVAC/Furnace AC Filter Replacement Dust DefenseComparable with MPR 600 & FPR 5 (Actual 11.75x17.75x0.75)**Komashr**$38.73**4.4★**▲ 119%**](https://www.amazon.com/dp/B0G3PB95WL) [**Pro - Source 12x18x1 Pleated Air Filter Wireless Pleated MERV 8 Synthetic Clay Coated Paper Board Frame 500 FPM 563 CFM Use with Any Unit**PRO SOURCE**$5.40**5.0★**▲ 82%**](https://www.amazon.com/dp/B0FDBLL947)
**~~View all trending →~~**
## **What buyers say about 12x18x1 air filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**39%
*“Filters”*
**Size-Overall**15%
*“Fit well no issues”*
**Quality-Overall**15%
*“good quality”*
**Ease Of Use**11%
*“Convenience”*
**Value For Money**11%
*“They are affordable”*
**Advertised Vs Actual Product**6%
*“As described”*
**Strength**4%
*“Sturdy”*
### **What buyers complain about **
**Advertised Vs Actual Product**50%
*“False Advertising”*
**Filtration**33%
*“the company just decided to make their filters cheaper in quality”*
**Durability**8%
*“these didn't last 2 weeks before having dust settling on items in my apartment on a daily basis”*
**Quality-Overall**8%
*“Not the same quality they used to be”*
### **Top return reasons **
**Size-Overall**82%
**Filtration**8%
**Advertised Vs Actual Product**5%
**Compatibility-Overall**5%
## **Common questions**
- **Is 12x18x1 air filter profitable to sell on Amazon United States?**
- The niche generates $101K/yr across 16 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +42.5%. Flapen's verdict: Skip it (48/100).
- **How competitive is the 12x18x1 air filter niche?**
- 11 brands and 24 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in 12x18x1 air filter?**
- Top complaints mined from reviews: Advertised Vs Actual Product, Filtration, Durability. The return rate is 0.7%.
- **When does demand for 12x18x1 air filter peak?**
- Demand peaks in Jun–Jul; the busiest month runs 2.4× the quietest.
- **What does it cost to enter the 12x18x1 air filter niche?**
- Listings span $5.40–$59.53; the average listing price is $37.21 (sweet spot $15–$100). The average incumbent carries 12,663 reviews — the moat a new listing must climb.
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