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Navien

Fail

Demand is soft, at -42.6% this quarter, so Navien is a Fail.

Flapen Score
35
35 / 100
Ranks 8,681 of 9,536 Tools & Home Improvement niches · −13 vs the category median of 48
Market size
$45K/yr32K searches / yr
90-day growth
-42.6%search demand this quarter
Competition
52%top-5 click share · 10 brands · 29 sellers

Flapen Score

Navien against its category

The dotted line is the Tools & Home Improvement average. Past it, Navien is stronger. Inside it, weaker.

35Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Navien market on Amazon at a glance

Shoppers on Amazon United States searched for Navien 32K times last year and spent an estimated $45K. The top 5 brands take 84% of clicks. Demand peaks in Jan–Feb–Oct–Nov–Dec. Flapen scores it 35 out of 100, a Fail.

01 · Demand

An estimated 1.5% of those searches ended in a purchase.

Shoppers searched for this 32K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 1.5% of those searches ended in a purchase. Searches in the last 90 days moved -42.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $45K a year.

Searches, last 12 months
32K
Growth, 90 days vs prior 90
-42.6%
Conversion, latest week
1.5%
Market size, estimated
$45Ka year
Peak month
November3.0× the quietest month
Top search term
navien tankless water heater parts11K searches a year

02 · Price

A sale here is worth $94.69.

Listings sell for $94.69 on average, from $10.74 to $498.01. Amazon reports units sold in ranges. This niche sold 500 to 750 a year. The average listing sells 0 to 100 of them. At $94.69 that is $0 to $9K a year per listing.

Average price
$94.69inside the $15 to $100 sweet spot
Price range
$10.74–$498.01
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
500–750
Units per listing a year
0–100
Revenue per listing a year
$0–$9K
Returns
5.0%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is low.

67% of listings pay for placement with sponsored ads. 89% ship with Prime. On an average day, 0.4% of listings are out of stock. The average listing ranks #5,400 within Plumbing. It carries 55 reviews at 4.32 stars, so a new listing needs social proof before a better product.

Sponsored listings
67%
Prime listings
89%
Out of stock, average day
0.4%
Average rank
#5,400in Plumbing
Average rating
4.32 starsAmazon United States average 4.42 stars
Average reviews
55per listing
Listings tracked
18

04 · Newcomers

0 of last year's 3 launches cleared the first-year sales bar.

3 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 29 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
3
Successful launches
0Amazon's first-year sales bar
Average brand age
29 months

Products

Top Navien products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 29, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 52% of clicks. Leaders hold, but buyers still shop past them.

$0$2K$5K$7K$9K1101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

Brands

10 flat

Sellers

29

Est. top-5 brand share

84%

Top 20: 100%

Est. top-5 click share

52%

Top 20: 100%

Open market

12%

  • Navien35%
  • DuckcowsC19%
  • RMSPO12%
  • Navien Mate9%
  • GEAIN9%
  • LNATPPE4%
  • Open — no brand owns it (4 brands, 12%)

Demand

Navien search demand

Weekly searches over the year, seasonality beneath. Pick a range.

1K600Spike '24Black Friday '24Prime Day '25Spike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 3.0×

Search terms

Top Navien search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • navien tankless water heater parts11K/yr
  • navien parts11K/yr
  • navien10K/yr

Reviews and returns

What reviews say buyers love and hate about Navien

We read the reviews and the return reasons for every product selling here.

33%of positive reviews mention “Size-Overall”
25%of negative reviews mention “Leak-Proof”
5.0%of orders come back
“Leaky valve”
A buyer, on “Leak-Proof”25% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

15 topics

NegativePositive

FAQ

Common Navien questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data