Is 20x25x5 air filter profitable to sell on Amazon United States?

The niche generates $3.5M/yr across 8 tracked products. 90-day search growth is +18.9%. Flapen's verdict: Launch it (56/100).

How competitive is the 20x25x5 air filter niche?

4 brands and 23 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in 20x25x5 air filter?

Top complaints mined from reviews: Size-Overall, Filtration, Quality-Overall. The return rate is 1.0%.

When does demand for 20x25x5 air filter peak?

Demand peaks in Jul–Oct; the busiest month runs 1.8× the quietest.

What does it cost to enter the 20x25x5 air filter niche?

Listings span $31.08–$82.72; the average listing price is $54.47 (sweet spot $15–$100). The average incumbent carries 6,010 reviews — the moat a new listing must climb.

20x25x5 air filter

Launch it

A $3.5M/yr market growing +18.9% this quarter with returns at 1.0% — clears our launch bar.

Market size

Incredible$3.5M

$3.5M/yr · 523K searches

Conversion

Incredible12.4%

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

Returns

Incredible1.0%

return rate — above 5% kills the launch gate

Price range

Incredible$31.08–$82.72

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

Avg price

Great$54.47

avg listing price — sweet spot $15–$100

Growth

Okay+18.9%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Bad6,010.38

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, 20x25x5 air filter is a $3.5M/yr Amazon United States market (523K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jul–Oct. Verdict: Launch it — 56/100.

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

20x25x5 air filter market data

Units sold / yr: 60K–80K; avg 8,000–10,000/product
Revenue / yr: $3.3M–$4.4M; units × avg price
Conversion rate: 12.4%
Avg BSR: #83
Page quality: 0%
Prime: 50%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 57 months
Avg seller age: 159 days

Competition & brand share

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

Brands

4 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

89%

Top 20: 100%

Open market

Filtrete56%
Filterbuy34%
Nordic Pure6%
AIRx Filters4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +18.9% search growth over the last 90 days.

Peak months: Jul, Oct · busiest ÷ quietest = 1.8×

Open Trend

Top 20x25x5 air filter search terms

20x25x5 air filter221K/yr +27.9%11.9% conv.
furnace filters 20x25x568K/yr -3.5%9.0% conv.
20x25x5 furnace filter64K/yr -8.2%10.3% conv.
air filter 20x25x533K/yr +42.4%11.9% conv.
20x25x523K/yr +22.1%10.8% conv.
furnace filter 20x25x522K/yr +2.1%11.1% conv.
20 x 25 x 5 air filter18K/yr +40.5%13.6% conv.
filter 20x25x511K/yr +21.7%11.3% conv.
20x25x5 filter9K/yr +34.2%9.7% conv.
20 25 5 air filter7K/yr +25.0%12.0% conv.

All search terms

Top 20x25x5 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 20x25x5 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 19.63 x 24.75 x 4.31 in)

Filtrete$46.524.6★2,304 rev

Filterbuy 20x25x5 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1037 Lennox X6673 and More (Actual Size: 19.88 x 24.75 x 4.38)

Filterbuy$49.964.6★19,747 rev

Filtrete 20x25x5 Air Filter MERV 12 MPR 1550 Certified Asthma & Allergy Friendly 1-Pack Fits Trion AirBear AC Furnace HVAC Filters Pleated Electrostatic (Actual Size 19.56 x 24.13 x 4.75 in)

Filtrete$31.084.3★5,197 rev

Filterbuy 20x25x5 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1037 Lennox X6673 and More (Actual Size: 19.88 x 24.75 x 4.38)

Filterbuy$54.594.6★13,433 rev

Nordic Pure 20x25x5 (19_7/8 x 24_7/8 x 4_3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack

Nordic Pure$52.954.6★3,950 rev

Newest

by launch date

Filtrete 20x25x5 Air Filter MERV 11 MPR 1000 Micro Allergen Defense 2-Pack Fits Lennox AC Furnace HVAC Filters for Home Pleated Electrostatic (Actual Size 19.63 x 24.75 x 4.31 in)

Filtrete$46.522,304 rev

3y ago

Filtrete 20x25x5 AC Furnace Air Filter MPR 700 MERV 8 Fits Trion Air Bear & Carrier Dust Pollen & Pet Dander Reduction 2-Pack (actual size 19.56 x 24.13 x 4.75 in)

Filtrete$48.43939 rev

4y ago

AIRx Filters 20x25x5 Furnace Filter MERV 8 HVAC AC Air Filter Compatible Replacement for Honeywell FC100A1037 FC35A1027 CF200A1016 Dust 4-Pack

AIRx Filters$82.7247 rev

7y ago

Filtrete 20x25x5 Air Filter MERV 12 MPR 1550 Certified Asthma & Allergy Friendly 1-Pack Fits Trion AirBear AC Furnace HVAC Filters Pleated Electrostatic (Actual Size 19.56 x 24.13 x 4.75 in)

Filtrete$31.085,197 rev

11y ago

Filterbuy 20x25x5 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack) Pleated HVAC AC Furnace Filters for Honeywell FC100A1037 Lennox X6673 and More (Actual Size: 19.88 x 24.75 x 4.38)

Filterbuy$49.9619,747 rev

11y ago

What buyers say about 20x25x5 air filter

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

What buyers love

Filtration27%

“Good filter”

Quality-Overall21%

“Excellent Quality”

Size-Overall19%

“Fit well”

Advertised Vs Actual Product9%

“As advertised”

Value For Money8%

“Great value”

Efficiency2%

“Work well”

Assembly/Installation2%

“Easy to install”

Thickness1%

“Great product the condition is great the thickness in the product is what i need for my ac system”

Ease Of Use1%

“it was easy to order”

Compatibility-Overall1%

“glad it actually was compatible with the machine”

What buyers complain about

Size-Overall44%

“Didn't fit”

Filtration13%

“The condition of the filter is not very good”

Quality-Overall5%

“Not good quality”

Compatibility-Overall4%

“Does not fit my AC”

Advertised Vs Actual Product4%

“A lot smaller than advertised”

Value For Money3%

“Too expensive”

Allergies2%

“Allergies developed after using this”

Measurement/Reading Accuracy2%

“inconsistent”

Thickness2%

“a bit too thin”

Assembly/Installation1%

“cant be installed without destroying the filter or not getting the cover closed”

Top return reasons

Size-Overall70%

Filtration14%

Compatibility-Overall9%

Advertised Vs Actual Product2%

Value For Money1%

Defective Material/Parts1%

Product Condition0%

Functionality-Overall0%

Ease Of Use0%

Certifications0%

Common questions

Is 20x25x5 air filter profitable to sell on Amazon United States?: The niche generates $3.5M/yr across 8 tracked products. 90-day search growth is +18.9%. Flapen's verdict: Launch it (56/100).
How competitive is the 20x25x5 air filter niche?: 4 brands and 23 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in 20x25x5 air filter?: Top complaints mined from reviews: Size-Overall, Filtration, Quality-Overall. The return rate is 1.0%.
When does demand for 20x25x5 air filter peak?: Demand peaks in Jul–Oct; the busiest month runs 1.8× the quietest.
What does it cost to enter the 20x25x5 air filter niche?: Listings span $31.08–$82.72; the average listing price is $54.47 (sweet spot $15–$100). The average incumbent carries 6,010 reviews — the moat a new listing must climb.