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.

12x18x1 air filter

Skip it

A concentrated shelf (top 5 take 79% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.7%

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

Great7.8%

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

Bad91%

top-5 brand share — brand-locked demand

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Review moat

Bad12,662.88

avg incumbent reviews — the moat a new listing must climb

Competition

Bad79%

top-5 click share — a locked-up shelf

Signals Low Review Barrier Out of Stock

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

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

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

79%

Top 20: 100%

Open market

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.

Peak months: Jun, Jul · busiest ÷ quietest = 2.4×

Open Trend

Top 12x18x1 air filter search terms

12x18x1 air filter18K/yr +33.3%8.9% conv.
air filter 12x18x16K/yr +53.8%6.4% conv.
furnace filters 12x18x14K/yr +66.3%1.0% conv.
12x18x1 furnace filter4K/yr +44.1%1.1% conv.
12x18 air filter3K/yr +48.3%14.5% conv.

All 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.

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

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$29.334.8★118 rev

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$37.744.6★604 rev

Simply 12x18x1 Air Filter Merv 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 11.75x17.75x0.75) DUST Pet & Allergy Control

Simply$41.754.7★53,363 rev

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$26.164.7★740 rev

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$38.734.4★23 rev

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$25.3521 rev

3mo ago

(6 Pack) 12x18x1 Air Filter MPR 1900 & FPR 10 MERV 13 Pleated Air Filter (Actual Size:11 3/4x17 3/4x3/4 inch)

Chenzhit$38.77647 rev

4mo ago

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$29.33118 rev

6mo ago

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$38.7323 rev

6mo ago

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$5.401 rev

1y ago

What buyers say about 12x18x1 air filter

What buyers praise and complain about, mined from review topics.

What buyers love

Filtration39%

“Filters”

Size-Overall15%

“Fit well no issues”

Quality-Overall15%

“good quality”

Ease Of Use11%

“Convenience”

Value For Money11%

“They are affordable”

Advertised Vs Actual Product6%

“As described”

Strength4%

“Sturdy”

What buyers complain about

Advertised Vs Actual Product50%

“False Advertising”

Filtration33%

“the company just decided to make their filters cheaper in quality”

Durability8%

“these didn't last 2 weeks before having dust settling on items in my apartment on a daily basis”

Quality-Overall8%

“Not the same quality they used to be”

Top return reasons

Size-Overall82%

Filtration8%

Advertised Vs Actual Product5%

Compatibility-Overall5%

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.