Is 18x36x1 air filter profitable to sell on Amazon United States?

The niche generates $85K/yr across 8 tracked products. 90-day search growth is +55.2%. Flapen's verdict: Skip it (44/100).

How competitive is the 18x36x1 air filter niche?

3 brands and 7 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.

What does it cost to enter the 18x36x1 air filter niche?

Listings span $38.73–$89.39; the average listing price is $60.04 (sweet spot $15–$100). The average incumbent carries 19,466 reviews — the moat a new listing must climb.

18x36x1 air filter

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Price range

Incredible$38.73–$89.39

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Great$60.04

avg listing price — sweet spot $15–$100

Growth

Good+55.2%

90-day search growth — must beat 0% to launch

Conversion

Good5.5%

search→purchase rate — share of searches ending in a sale

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$85K

$85K/yr · 26K searches

Review moat

Bad19,466

avg incumbent reviews — the moat a new listing must climb

Competition

Bad89%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals High Price

According to Flapen's Amazon United States niche tracking, 18x36x1 air filter is a $85K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 44/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

18x36x1 air filter market data

Units sold / yr: 2K–2K; avg 100–250/product
Revenue / yr: $90K–$120K; units × avg price
Conversion rate: 5.5%
Avg BSR: #252
Page quality: 0%
Prime: 13%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 73 months
Avg seller age: 197 days

Competition & brand share

The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

89%

Top 20: 100%

Open market

Filterbuy44%
Filtrete40%
Filter King17%

Demand

Weekly Amazon search volume, last 33 weeks — +55.2% search growth over the last 90 days.

Open Trend

Top 18x36x1 air filter search terms

18x36x1 air filter14K/yr +51.5%7.8% conv.
air filter 18x36x15K/yr +35.4%3.2% conv.
furnace filters 18x36x14K/yr +75.4%1.0% conv.
18x36x1 furnace filter3K/yr +82.3%0.1% conv.

All search terms

Top 18x36x1 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Filtrete 18x36x1 AC Furnace Air Filter MERV 8 MPR 700 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.81 x 35.81 x 0.65 in)

Filtrete$44.664.7★6,265 rev

Filterbuy 18x36x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.50 x 35.50 x 0.75)

Filterbuy$56.314.6★170 rev

Filterbuy 18x36x1 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.50 x 35.50 x 0.75)

Filterbuy$41.034.6★68,921 rev

Filter King 18x36x1 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 35.5 x .75)

Filter King$54.504.6★3,373 rev

Filter King 18x36x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 35.5 x .75)

Filter King$76.744.7★2,030 rev

Newest

by launch date

Filtrete 18x36x1 AC Furnace Air Filter MERV 8 MPR 700 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.81 x 35.81 x 0.65 in)

Filtrete$44.666,265 rev

2y ago

Filter King 18x36x1 Air Filter (MERV 8) (2-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 35.5 x .75)

Filter King$38.738 rev

7y ago

Filter King 18x36x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 35.5 x .75)

Filter King$76.742,030 rev

7y ago

Filter King 18x36x1 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 35.5 x .75)

Filter King$54.503,373 rev

8y ago

Filterbuy 18x36x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.50 x 35.50 x 0.75)

Filterbuy$56.31170 rev

13y ago

What buyers say about 18x36x1 air filter

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

What buyers love

Size-Overall50%

“Perfect fit for my setup”

Strength50%

“Its very sturdy”

Top return reasons

Size-Overall86%

Filtration9%

Functionality-Overall3%

Compatibility-Overall2%

Value For Money2%

Common questions

Is 18x36x1 air filter profitable to sell on Amazon United States?: The niche generates $85K/yr across 8 tracked products. 90-day search growth is +55.2%. Flapen's verdict: Skip it (44/100).
How competitive is the 18x36x1 air filter niche?: 3 brands and 7 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.
What does it cost to enter the 18x36x1 air filter niche?: Listings span $38.73–$89.39; the average listing price is $60.04 (sweet spot $15–$100). The average incumbent carries 19,466 reviews — the moat a new listing must climb.