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18x22x1 air filter

Skip it

Brand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.

Market size 24Growth 69Conversion 75Competition 13Returns 97Price range 90Avg price 95Brand share 4Review moat 19Quality gap 21

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Avg price

Incredible$42.08

avg listing price — sweet spot $15–$100

Price range

Great$12.03–$60.73

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

Conversion

Great7.0%

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

Growth

Good+49.9%

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

Market size

Bad$96K

$96K/yr · 32K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Review moat

Bad15,921

avg incumbent reviews — the moat a new listing must climb

Competition

Bad84%

top-5 click share — a locked-up shelf

Brand share

Bad99%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, 18x22x1 air filter is a $96K/yr Amazon United States market (32K searches/yr). The top 5 brands hold 99% of demand. Demand peaks in Jun–Jul. Verdict: Skip it — 46/100.

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

18x22x1 air filter market data

Units sold / yr
3K–3K
avg 100–250/product
Revenue / yr
$105K–$126K
units × avg price
Conversion rate
7.0%
Avg BSR
#115
Page quality
0%
Prime
18%
Sponsored
64%
Out of stock
0.5%
Avg brand age
84 months
Avg seller age
200 days

Competition & brand share

The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 flat

Sellers

10

Top-5 brand share

99%

Top 20: 100%

Top-5 click share

84%

Top 20: 100%

Open market

0%

  • Filterbuy44%
  • Filtrete31%
  • Filter King17%
  • SpiroPure4%
  • PRO SOURCE3%
  • Aerostar1%

Demand & seasonality

Weekly Amazon search volume, last 101 weeks — +49.9% search growth over the last 90 days.
1K600Spike '25Holiday '25Spike '26DecMarJunAugNovMarMay

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

Open Trend

Top 18x22x1 air filter search terms

  • 18x22x1 air filter19K/yr
  • air filter 18x22x15K/yr
  • 18x22x1 furnace filter4K/yr
  • furnace filters 18x22x14K/yr
All search terms

Top 18x22x1 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.

0%10%$10K20%$19K30%$29K40%$38K1101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share
1
Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy$45.644.6★312 rev

2
Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete$26.104.7★740 rev

3
Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King$52.304.7★2,030 rev

4
Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (6-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (6-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy$50.514.7★51,098 rev

5
Filtrete 18x22x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.69 x 21.69 x 0.81 in)

Filtrete 18x22x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.69 x 21.69 x 0.81 in)

Filtrete$43.024.7★6,265 rev

Newest

by launch date
Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete$26.10740 rev

1y ago
Pro- Source 18 x 22 x 1 Nominal MERV 8 35% Efficiency Wire-Backed Pleated Air Filter HVAC AC Furnance Replacement

Pro- Source 18 x 22 x 1 Nominal MERV 8 35% Efficiency Wire-Backed Pleated Air Filter HVAC AC Furnance Replacement

PRO SOURCE$12.033 rev

1y ago
Filtrete 18x22x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.69 x 21.69 x 0.81 in)

Filtrete 18x22x1 AC Furnace Air Filter MPR 700 MERV 8 Tough on Pollen Easy on Airflow 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4-Pack (Actual Size 17.69 x 21.69 x 0.81 in)

Filtrete$43.026,265 rev

1y ago
SpiroPure 18x22x1 MERV 8 Pleated Air Filters AC Furnace HVAC Filter 6 Pack

SpiroPure 18x22x1 MERV 8 Pleated Air Filters AC Furnace HVAC Filter 6 Pack

SpiroPure$50.57162 rev

6y ago
Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King$52.302,030 rev

7y ago

Trending

90-day click momentum
Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King 18x22x1 Air Filter (MERV 8) (6-Pack) Dust & Allergy Control AC Furnace Filters MADE IN USA HVAC Pleated Electrostatic (Actual Size: 17.5 x 21.5 x .75)

Filter King$52.304.7★

▲ 127%
Pro- Source 18 x 22 x 1 Nominal MERV 8 35% Efficiency Wire-Backed Pleated Air Filter HVAC AC Furnance Replacement

Pro- Source 18 x 22 x 1 Nominal MERV 8 35% Efficiency Wire-Backed Pleated Air Filter HVAC AC Furnance Replacement

PRO SOURCE$12.035.0★

▲ 74%
Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy 18x22x1 Air Filter MERV 8 Essential Dust & Allergy Defense (4-Pack) Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA (Actual Size: 17.75 x 21.75 x 0.75)

Filterbuy$45.644.6★

▲ 30%
SpiroPure 18x22x1 MERV 8 Pleated Air Filters AC Furnace HVAC Filter 6 Pack

SpiroPure 18x22x1 MERV 8 Pleated Air Filters AC Furnace HVAC Filter 6 Pack

SpiroPure$50.574.7★

▲ 19%
Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete 18x22x1 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 17.69 x 21.69 x 0.81 in)

Filtrete$26.104.7★

— 10%

What buyers say about 18x22x1 air filter

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

What buyers love

Filtration50%

“Good filters”

Quality-Overall40%

“Product is good quality”

Value For Money10%

“Good and affordable choice”

What buyers complain about

Material Quality33%

“The filter materials are flimsy and thin, they're not worth the price being charged”

Filtration33%

“The filters came bent up even though they were in a box”

Strength33%

“Flimsy”

Top return reasons

Size-Overall85%
Filtration9%
Compatibility-Overall4%
Measurement/Reading Accuracy1%
Advertised Vs Actual Product1%

Common questions

Is 18x22x1 air filter profitable to sell on Amazon United States?
The niche generates $96K/yr across 11 tracked products. 90-day search growth is +49.9%. Flapen's verdict: Skip it (46/100).
How competitive is the 18x22x1 air filter niche?
6 brands and 10 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 99% of demand.
What do buyers complain about in 18x22x1 air filter?
Top complaints mined from reviews: Material Quality, Filtration, Strength. The return rate is 0.7%.
When does demand for 18x22x1 air filter peak?
Demand peaks in Jun–Jul; the busiest month runs 2.2× the quietest.
What does it cost to enter the 18x22x1 air filter niche?
Listings span $12.03–$60.73; the average listing price is $42.08 (sweet spot $15–$100). The average incumbent carries 15,921 reviews — the moat a new listing must climb.