---
title: "16x25x5 Furnace Filter — $2.2M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/16x25x5-furnace-filter"
last_updated: "2026-08-07T21:24:43.892Z"
locale: en
meta:
description: "Niche score 53/100 · $2.2M/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · $2.2M/yr market. Brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "16x25x5 Furnace Filter — $2.2M/yr Amazon US Niche (2026) - Flapen"
---
# **16x25x5 furnace filter**
**Worth a look**
Shows a $2.2M/yr market, but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Market size 95Growth 25Conversion 92Competition 19Returns 90Price range 95Avg price 91Brand share 6Review moat 26Quality gap 32
**Market size**
**Incredible****$2.2M**
$2.2M/yr · 347K searches
**Price range**
**Incredible****$29.09–$84.51**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****11.4%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$56.41**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****3,920.67**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+0.1%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**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, 16x25x5 furnace filter is a $2.2M/yr Amazon United States market (347K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Oct. Verdict: Worth a look — 53/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **16x25x5 furnace filter market data**
- **Units sold / yr**
- **30K–40K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$1.7M–$2.3M**
- units × avg price
- **Conversion rate**
- **11.4%**
- **Avg BSR**
- **#265**
- **Page quality**
- **0%**
- **Prime**
- **50%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **61 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **▲rising
**Sellers**
**35**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**0%**
- Filtrete41% - Filterbuy34% - AIRx Filters12% - Nordic Pure8% - Lennox3% - HEALTHY CLIMATE2%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +0.1% search growth over the last 90 days.
9K7KSpike '24Holiday '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/16x25x5-furnace-filter/trend)
## **Top 16x25x5 furnace filter search terms**
- **16x25x5 furnace filter**130K/yr-16.8%11.2% conv. - **16x25x5 air filter**85K/yr-3.2%11.0% conv. - **16x25x5**19K/yr+29.3%9.9% conv. - **air filter 16x25x5**17K/yr+18.4%13.6% conv. - **furnace filters 16x25x5**20K/yr-0.1%9.0% conv. - **furnace filter 16x25x5**13K/yr-9.0%11.9% conv. - **16 x 25 x 5 furnace filter**11K/yr-5.4%11.0% conv. - **16x25x5 filter**7K/yr+38.2%10.3% conv. - **merv 11 16x25x5**8K/yr+41.9%11.7% conv. - **16x25x5 merv 11**5K/yr+47.1%10.2% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/16x25x5-furnace-filter/search-terms)
## **Top 16x25x5 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%10%$222K20%$444K30%$666K40%$888K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Filtrete 16x25x5 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.63x24.74x4.31 in)**Filtrete**$47.85**4.6★1,680 rev](https://www.amazon.com/dp/B0BVXJG134) [2**Filterbuy 16x25x5 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1029 Lennox X6670 and More (Actual Size: 15.75 x 24.75 x 4.38)**Filterbuy**$48.64**4.6★19,747 rev](https://www.amazon.com/dp/B00NVF4U1G) [3**Filtrete 16x25x5 AC Furnace Air Filter MPR 1550 MERV 12 Fits Honeywell & Trion AirBear CERTIFIED Asthma & Allergy Friendly Electrostatic Air Filter 1-Pack (actual size 15.75 x 24.13 x 4.88)**Filtrete**$29.09**4.3★5,197 rev](https://www.amazon.com/dp/B01MTNH7G9) [4**Filterbuy 16x25x5 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1029 Lennox X6670 and More (Actual Size: 15.75 x 24.75 x 4.38)**Filterbuy**$59.91**4.6★13,433 rev](https://www.amazon.com/dp/B00NVGXYVM) [5**Nordic Pure 16x25x5 (15_3/4 x 24_3/4 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack**Nordic Pure**$53.28**4.7★3,523 rev](https://www.amazon.com/dp/B004QL75VQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters Lennox Healthy Climate Filter for Home with Cleaning Cloth 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)**HEALTHY CLIMATE**$59.20**57 rev9mo ago](https://www.amazon.com/dp/B0FN5SGKV4) [**Filtrete 16x25x5 AC Furnace Air Filter MERV 13 MPR 1900 Premium Allergen Bacteria & Virus Filter Electrostatic Air Cleaning Filter 2-Pack (Actual Size 15.75 x 24.13 x 4.88 in)**Filtrete**$73.09**379 rev1y ago](https://www.amazon.com/dp/B0DCGPQ88M) [**AIRX FILTERS WICKED CLEAN AIR. 16x25x5 Air Filter MERV 11 Compatible with Lennox X6670 Air Filter 2 Pack**AIRx Filters**$48.77**93 rev2y ago](https://www.amazon.com/dp/B0CF7W9KXC) [**Filtrete 16x25x5 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 15.63x24.74x4.31 in)**Filtrete**$47.85**1,680 rev3y ago](https://www.amazon.com/dp/B0BVXJG134) [**AIRX FILTERS WICKED CLEAN AIR. Compatible/Replacement for 16x25x5 MERV 11 HVAC AC Furnace Air Filter Honeywell FC100A1029 CF200A1008 CF200D1625 Allergy 4-Pack Made in the USA**AIRx Filters**$84.51**213 rev7y ago](https://www.amazon.com/dp/B09M594R11)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AIRx Filters 16x25x5 Furnace Filter MERV 8 HVAC AC Air Filter Replacement for Lennox X0583 X6670 X6672 Easy Installation Allergen Control Reduces Dust & Pollen 2-Pack**AIRx Filters**$40.84**4.3★**▲ 284%**](https://www.amazon.com/dp/B09M557G1X) [**AIRX FILTERS WICKED CLEAN AIR. 16x25x5 Air Filter MERV 11 Compatible with Lennox X6670 Air Filter 2 Pack**AIRx Filters**$48.77**4.6★**▲ 126%**](https://www.amazon.com/dp/B0CF7W9KXC) [**AIRX FILTERS WICKED CLEAN AIR. Compatible/Replacement for 16x25x5 MERV 11 HVAC AC Furnace Air Filter Honeywell FC100A1029 CF200A1008 CF200D1625 Allergy 4-Pack Made in the USA**AIRx Filters**$84.51**4.5★**▲ 79%**](https://www.amazon.com/dp/B09M594R11) [**Lennox X6670 16x25x5 Air Filter MERV 11 HVAC AC Furnace Filters Lennox Healthy Climate Filter for Home with Cleaning Cloth 2-Pack (Actual Size: 15.75 x 24.75 x 4.38 Inches)**HEALTHY CLIMATE**$59.20**4.8★**▲ 57%**](https://www.amazon.com/dp/B0FN5SGKV4) [**Nordic Pure 16x25x5 (15_3/4 x 24_3/4 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack**Nordic Pure**$53.28**4.7★**▲ 37%**](https://www.amazon.com/dp/B004QL75VQ)
**~~View all trending →~~**
## **What buyers say about 16x25x5 furnace filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**24%
*“Good Filtration performance”*
**Size-Overall**24%
*“Fit well”*
**Quality-Overall**14%
*“Great product and works as intended”*
**Value For Money**13%
*“Fair price”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Assembly/Installation**3%
*“easy to install”*
**Ease Of Use**2%
*“Easy to use and very efficient”*
**Strength**2%
*“Always reliable”*
**Allergies**1%
*“Furnace filters - hopefully the clean filters will help with my allergies”*
**Maintenance And Repair**1%
*“Likenthe fact that they do not have to be changed frequently”*
### **What buyers complain about **
**Size-Overall**45%
*“Slightly too big”*
**Filtration**13%
*“The air filter is of poor quality”*
**Thickness**12%
*“the Lennox X6670 filter was too thin to fit snugly into the MAC 1400 system”*
**Quality-Overall**7%
*“Poor Quality”*
**Compatibility-Overall**5%
*“It is not compatible”*
**Value For Money**4%
*“they are also MUCH more expensive”*
**Adhesion/Stickiness**2%
*“no glue to hold it”*
**Strength**1%
*“A little flimsy”*
**Measurement/Reading Accuracy**1%
*“Measurements not accurate”*
**Ease Of Use**1%
*“when removing they are difficult to remove”*
### **Top return reasons **
**Size-Overall**68%
**Filtration**16%
**Compatibility-Overall**9%
**Advertised Vs Actual Product**2%
**Value For Money**1%
**Defective Material/Parts**1%
**Thickness**1%
**Certifications**0%
**Quality-Overall**0%
**Functionality-Overall**0%
## **Common questions**
- **Is 16x25x5 furnace filter profitable to sell on Amazon United States?**
- The niche generates $2.2M/yr across 12 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +0.1%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the 16x25x5 furnace filter niche?**
- 6 brands and 35 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in 16x25x5 furnace filter?**
- Top complaints mined from reviews: Size-Overall, Filtration, Thickness. The return rate is 1.2%.
- **When does demand for 16x25x5 furnace filter peak?**
- Demand peaks in Oct; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the 16x25x5 furnace filter niche?**
- Listings span $29.09–$84.51; the average listing price is $56.41 (sweet spot $15–$100). The average incumbent carries 3,921 reviews — the moat a new listing must climb.
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