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.

18x24x1 air filter

Launch it

A $1.8M/yr market growing +40.3% this quarter with returns at 0.5% — clears our launch bar.

Returns

Incredible0.5%

return rate — above 5% kills the launch gate

Conversion

Incredible13.3%

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

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay69%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad27,160.94

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad100%

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

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

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

69%

Top 20: 100%

Open market

Filtrete56%
Filterbuy29%
Simply10%
TRIGHTFILTERS3%
BNX1%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +40.3% search growth over the last 90 days.

Peak months: Jun, Jul, Aug · busiest ÷ quietest = 2.2×

Open Trend

Top 18x24x1 air filter search terms

18x24x1 air filter173K/yr +46.3%12.7% conv.
air filter 18x24x137K/yr +24.3%14.2% conv.
ac filter 18x24x121K/yr +60.4%13.2% conv.
18 x 24 x 1 air filters for home16K/yr +9.4%13.9% conv.
18x24x1 air filter 6 pack13K/yr +41.4%14.3% conv.
air filters 18x24x110K/yr +27.8%16.3% conv.
ac filters 18x24x17K/yr +57.8%11.4% conv.
18x24x18K/yr +17.6%12.9% conv.
18 24 1 air filter8K/yr +8.3%11.3% conv.
furnace filters 18x24x17K/yr +25.6%6.0% conv.

All 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.

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

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$34.284.7★160,547 rev

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$21.894.8★57,731 rev

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$37.394.5★3,680 rev

Simply 18x24x1 Air Filter Merv 8 6 Pack For Home AC Furnace & HVAC (Actual Size: 17.75x23.75x0.75) DUST Pet & Allergy Control

Simply$42.114.7★53,363 rev

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$42.974.7★51,098 rev

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$53.24627 rev

1y ago

Filtrete 18x24x1 Air Filter 3M MERV 1 HVAC AC Furnace Filter Replacement 6-Pack (Actual Size 17.81x23.81x0.88 in)

Filtrete$34.89249 rev

1y ago

TRIGHTFILTERS 18x24x1 Air Filter 4 Pack MERV 8 Pleated Dust Defense Air Filters Replacement for Air Conditioner & Furnace Durable & Lightweight

TRIGHTFILTERS$33.881,900 rev

2y ago

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$44.48189 rev

2y ago

Simply 18x24x1 Air Filter Merv 8 4 Pack For Home AC Furnace & HVAC (Actual Size: 17.75x23.75x0.75) DUST Pet & Allergy Control

Simply$31.625,182 rev

3y ago

What buyers say about 18x24x1 air filter

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

What buyers love

Size-Overall25%

“Fit fine”

Value For Money22%

“Great Value”

Filtration22%

“Filtration properties seem adequate”

Quality-Overall11%

“are a good value per piece”

Advertised Vs Actual Product2%

“As expected”

Durability2%

“It last a great while before changing out”

Ease Of Cleaning2%

“the back side seemed completly clean showing that they indeed did stop most particulates”

Strength1%

“they are not flimsy like other inexpensive filters I've tried”

Ease Of Use1%

“Easy”

Material Quality1%

“Appear to be of high-quality materials”

What buyers complain about

Size-Overall67%

“Does not fit”

Filtration13%

“Filter runs small”

Advertised Vs Actual Product6%

“Misleading”

Quality-Overall2%

“Poor quality”

Value For Money2%

“Wasted 41 dollars on filter that does not fit”

Allergies1%

“Need an allergen filter”

Noise Level1%

“Makes a whistle sound as the air passes by”

Compatibility-Overall1%

“will not fit my system”

Strength1%

“Very flimsy”

Natural Resource Wastage1%

“Wasted money”

Top return reasons

Size-Overall76%

Filtration10%

Compatibility-Overall7%

Value For Money2%

Advertised Vs Actual Product1%

Defective Material/Parts1%

Quality-Overall1%

Certifications1%

Maintenance And Repair0%

Functionality-Overall0%

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.