---
title: "16x25x4 Furnace Filter — $6.6M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/16x25x4-furnace-filter"
last_updated: "2026-08-06T20:04:46.677Z"
locale: en
meta:
description: "Niche score 57/100 · $6.6M/yr market · 892K searches/yr · $59.14 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $6.6M/yr market · 892K searches/yr · $59.14 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "16x25x4 Furnace Filter — $6.6M/yr Amazon US Niche (2026) - Flapen"
---
# **16x25x4 furnace filter**
**Launch it**
A $6.6M/yr market growing +8.5% this quarter with returns at 0.9% — clears our launch bar.
Market size 99Growth 36Conversion 95Competition 26Returns 95Price range 95Avg price 90Brand share 3Review moat 20Quality gap 35
**Market size**
**Incredible****$6.6M**
$6.6M/yr · 892K searches
**Conversion**
**Incredible****12.5%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Price range**
**Incredible****$36.04–$90.60**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$59.14**
avg listing price — sweet spot $15–$100
**Growth**
**Okay****+8.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****70%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****12,638.56**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****99%**
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, 16x25x4 furnace filter is a $6.6M/yr Amazon United States market (892K searches/yr). The top 5 brands hold 99% of demand. Demand peaks in Oct. Verdict: Launch it — 57/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **16x25x4 furnace filter market data**
- **Units sold / yr**
- **100K–125K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$5.9M–$7.4M**
- units × avg price
- **Conversion rate**
- **12.5%**
- **Avg BSR**
- **#49**
- **Page quality**
- **0%**
- **Prime**
- **56%**
- **Sponsored**
- **69%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **164 days**
## **Competition & brand share**
The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**6 **▼falling
**Sellers**
**40**
**Top-5 brand share**
**99%**
Top 20: 100%
**Top-5 click share**
**70%**
Top 20: 100%
**Open market**
**0%**
- Filtrete50% - Filterbuy38% - Simply7% - Nordic Pure3% - Honeywell1% - MANN+HUMMEL1% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +8.5% search growth over the last 90 days.
25K15KSpike '24Holiday '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/16x25x4-furnace-filter/trend)
## **Top 16x25x4 furnace filter search terms**
- **16x25x4 furnace filter**257K/yr+7.9%12.3% conv. - **16x25x4 air filter**195K/yr-2.6%10.3% conv. - **furnace filters 16x25x4**156K/yr-6.4%9.9% conv. - **air filter 16x25x4**49K/yr+28.8%13.0% conv. - **16x25x4**36K/yr+28.4%10.0% conv. - **filtrete 16x25x4**30K/yr+18.3%15.4% conv. - **16 x 25 x 4 air filter**21K/yr+34.8%13.0% conv. - **furnace filter 16x25x4**26K/yr+7.9%8.4% conv. - **16x25x4 filter**16K/yr+22.6%9.9% conv. - **filter 16x25x4**16K/yr+19.8%12.9% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/16x25x4-furnace-filter/search-terms)
## **Top 16x25x4 furnace 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%5%$329K10%$659K15%$988K20%$1.3M101001K10K100K 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 16x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox & Honeywell AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.88x24.56x4.31 in)**Filtrete**$43.58**4.6★1,839 rev](https://www.amazon.com/dp/B09RQCMR5V) [2**Filtrete 16x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 4-Pack Fits Lennox & Honeywell AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.88 x 24.56 x 4.31 in)**Filtrete**$71.56**4.6★4,889 rev](https://www.amazon.com/dp/B01N5GYRTF) [3**Filterbuy 16x25x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 15.50 x 24.50 x 3.63)**Filterbuy**$43.23**4.6★68,921 rev](https://www.amazon.com/dp/B00CK04VEE) [4**Filtrete 16x25x4 Air Filter MERV 12 MPR 1550 Certified Asthma & Allergy Friendly 2-Pack Fits Lennox & Honeywell AC Furnace HVAC Filters Pleated Electrostatic (Actual Size 15.88x24.56x4.31 in)**Filtrete**$51.55**4.6★5,199 rev](https://www.amazon.com/dp/B09RQBQ776) [5**Filterbuy 16x25x4 Air Filter MERV 11 Superior Pet & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 15.50 x 24.50 x 3.63)**Filterbuy**$69.16**4.6★23,863 rev](https://www.amazon.com/dp/B00CJZ5SEW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Simply 16x25x4 Air Filter MERV 8 2 Pack For Home AC Furnace & HVAC (Actual Size: 15.5x24.5x3.63) DUST Pet&Allergy Control**Simply**$36.04**4,727 rev1y ago](https://www.amazon.com/dp/B0F3FVC3BZ) [**Simply 16x25x4 Air Filter MERV 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 15.5x24.5x3.63) DUST Pet & Allergy Control**Simply**$74.81**53,363 rev1y ago](https://www.amazon.com/dp/B0F1DT47M3) [**Honeywell FC100A1029 (2 Pack) - 16 x 25 x 4 Pleated Air Filter MERV 11 Bundle with Same Day Supply Filter Change Reminder**Honeywell**$65.96**385 rev2y ago](https://www.amazon.com/dp/B0D68B7LYS) [**MANN+HUMMEL 16x25x4 MERV 8 Pleated 4 AC Furnace Air Filter. Case of 6**MANN+HUMMEL**$79.20**39 rev2y ago](https://www.amazon.com/dp/B0CP9WCZ7D) [**Filtrete 16x25x4 AC Furnace Air Filter MPR 700 MERV 8 Fits Lennox & Honeywell Device Capture Dust Pollen & Pet Dander Electrostatic Air Cleaning Filter 2-Pack (Actual Size 15.88x24.56x4.31 in)**Filtrete**$49.37**428 rev4y ago](https://www.amazon.com/dp/B0B1PJNLR7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Simply 16x25x4 Air Filter MERV 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 15.5x24.5x3.63) DUST Pet & Allergy Control**Simply**$74.81**4.7★**▲ 123%**](https://www.amazon.com/dp/B0F1DT47M3) [**Simply 16x25x4 Air Filter MERV 8 2 Pack For Home AC Furnace & HVAC (Actual Size: 15.5x24.5x3.63) DUST Pet&Allergy Control**Simply**$36.04**4.6★**▲ 114%**](https://www.amazon.com/dp/B0F3FVC3BZ) [**MANN+HUMMEL 16x25x4 MERV 8 Pleated 4 AC Furnace Air Filter. Case of 6**MANN+HUMMEL**$79.20**4.6★**▲ 80%**](https://www.amazon.com/dp/B0CP9WCZ7D) [**Filtrete 16x25x4 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 4-Pack Fits Lennox & Honeywell AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.88 x 24.56 x 4.31 in)**Filtrete**$71.56**4.6★**▲ 44%**](https://www.amazon.com/dp/B01N5GYRTF) [**Filterbuy 16x25x4 Air Filter MERV 11 Superior Pet & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 15.50 x 24.50 x 3.63)**Filterbuy**$69.16**4.6★**▲ 23%**](https://www.amazon.com/dp/B00CJZ5SEW)
**~~View all trending →~~**
## **What buyers say about 16x25x4 furnace filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**21%
*“Fits just as it should”*
**Filtration**21%
*“The filter does a great job”*
**Value For Money**18%
*“Good Price”*
**Quality-Overall**14%
*“great quality construction”*
**Advertised Vs Actual Product**10%
*“As advertised”*
**Assembly/Installation**2%
*“Easy install”*
**Durability**1%
*“They are durable”*
**Ease Of Use**1%
*“Very convenient”*
**Compatibility-Overall**1%
*“works well for my HVAC”*
**Spray/Flow**1%
*“Better flow. Merv 8 change more frequently”*
### **What buyers complain about **
**Size-Overall**54%
*“DOES NOT FIT”*
**Filtration**13%
*“Poor quality filter”*
**Advertised Vs Actual Product**7%
*“False Advertising”*
**Quality-Overall**5%
*“I guess thier quality control is off”*
**Value For Money**3%
*“while its cheap”*
**Measurement/Reading Accuracy**3%
*“Measurements are Wrong”*
**Thickness**2%
*“Not 4 thick”*
**Compatibility-Overall**2%
*“Do not fit Honeywell”*
**Ease Of Use**1%
*“then getting it out took quite a bit of effort”*
**Thin**1%
*“Noticeably thinner than 4inch”*
### **Top return reasons **
**Size-Overall**68%
**Filtration**15%
**Compatibility-Overall**7%
**Value For Money**3%
**Advertised Vs Actual Product**3%
**Thickness**1%
**Defective Material/Parts**1%
**Functionality-Overall**1%
**Certifications**0%
**Maintenance And Repair**0%
## **Common questions**
- **Is 16x25x4 furnace filter profitable to sell on Amazon United States?**
- The niche generates $6.6M/yr across 16 tracked products. 90-day search growth is +8.5%. Flapen's verdict: Launch it (57/100).
- **How competitive is the 16x25x4 furnace filter niche?**
- 6 brands and 40 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 99% of demand.
- **What do buyers complain about in 16x25x4 furnace filter?**
- Top complaints mined from reviews: Size-Overall, Filtration, Advertised Vs Actual Product. The return rate is 0.9%.
- **When does demand for 16x25x4 furnace filter peak?**
- Demand peaks in Oct; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the 16x25x4 furnace filter niche?**
- Listings span $36.04–$90.60; the average listing price is $59.14 (sweet spot $15–$100). The average incumbent carries 12,639 reviews — the moat a new listing must climb.
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