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Central Heating Inhibitor

Fail

Demand is soft, at -40.9% this quarter, so Central Heating Inhibitor is a Fail.

Flapen Score
44
44 / 100
Ranks 1,524 of 2,225 DIY & Tools niches · −5 vs the category median of 49
Market size
£113K/yr76K searches / yr
90-day growth
-40.9%search demand this quarter
Competition
65%top-5 click share · 11 brands · 60 sellers

Flapen Score

Central Heating Inhibitor against its category

The dotted line is the DIY & Tools average. Past it, Central Heating Inhibitor is stronger. Inside it, weaker.

44Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Central Heating Inhibitor market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Central Heating Inhibitor 76K times last year and spent an estimated £113K. The top 5 brands take 80% of clicks. Demand peaks in Jan–Sep–Oct–Nov. Flapen scores it 44 out of 100, a Fail.

01 · Demand

11.2% of searches ended in a purchase last week.

Shoppers searched for this 76K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 11.2% of those searches ended in a purchase. Searches in the last 90 days moved -40.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £113K a year.

Searches, last 12 months
76K
Growth, 90 days vs prior 90
-40.9%
Conversion, latest week
11.2%
Market size, estimated
£113Ka year
Peak month
November2.9× the quietest month
Top search term
central heating inhibitor21K searches a year

02 · Price

A sale here is worth £13.19.

Listings sell for £13.19 on average, from £7.27 to £22.29. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 500 to 750 of them. At £13.19 that is £7K to £10K a year per listing.

Average price
£13.19under the $15 to $100 sweet spot
Price range
£7.27–£22.29
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
10K–13K
Units per listing a year
500–750
Revenue per listing a year
£7K–£10K
Returns
0.5%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

71% of listings pay for placement with sponsored ads. 71% ship with Prime. On an average day, 9.5% of listings are out of stock. The average listing ranks #476 within Building Supplies. It carries 616 reviews at 4.64 stars, so a new listing needs social proof before a better product.

Sponsored listings
71%
Prime listings
71%
Out of stock, average day
9.5%
Average rank
#476in Building Supplies
Average rating
4.64 starsAmazon United Kingdom average 4.36 stars
Average reviews
616per listing
Listings tracked
17

04 · Newcomers

Amazon counts 0 of last year's 2 launches as successful.

2 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 62 months on average, so the names here are established.

Launched, last 12 months
2
Successful launches
0Amazon's first-year sales bar
Average brand age
62 months

Products

Top Central Heating Inhibitor products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 65% of clicks. Leaders hold, but buyers still shop past them.

£0£6K£11K£17K£23K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

11 flat

Sellers

60

Top-5 brand share

80%

Top 20: 98%

Top-5 click share

65%

Top 20: 100%

Open market

13%

  • Fernox26%
  • LavaTap19%
  • Everbuild16%
  • Trade Chemicals10%
  • Sentinel9%
  • Trident8%
  • Open — no brand owns it (5 brands, 13%)

Demand

Central Heating Inhibitor search demand

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

3K2KSpike '24Spike '25Black Friday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Sep, Oct, Nov · busiest ÷ quietest = 2.9×

Search terms

Top Central Heating Inhibitor search terms shoppers use

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

  • central heating inhibitor21K/yr
  • fernox f1 inhibitor12K/yr
  • inhibitor for central heating13K/yr
  • fernox9K/yr
  • radiator inhibitor9K/yr
  • inhibitor5K/yr
  • fernox f14K/yr
  • radiator inhibitor fluid3K/yr

Reviews and returns

What reviews say buyers love and hate about Central Heating Inhibitor

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Leak-Proof33%

Useless against a pinhole sized leak

I had a very small leak from an external tape joint that is corroded

didn't work on leaky towel rail

Rusts/Corrodes11%+0.18

Rust spots on radiators

Product Condition11%+0.09

Good stuff, used for some years

Ease Of Cleaning11%−0.08

Would be great if it wasnt for the fact that it is incredibly difficult to keep the nozzle clean

Value For Money11%+0.91

Its expensive for what it is no question

Expensive

Love

Quality-Overall21%+1.17

Excellent product

Absolutely brilliant piece of kit

appears well made

Advertised Vs Actual Product20%+1.13

As advertised

Works exactly as it says on the box

As described

Ease Of Use17%+0.91

Easy to use

Such a handy bit of kit

Very handy

Value For Money15%+0.91

Excellent value for money

Good price

reasonable price

Leak-Proof9%

did not leak fernox flowed through no problems had a few drips on removal

fixed my plastic pipe leak

no leaks away

Return

0.5% Return rate 23% Fixable by listing

Leak-Proof30%▅▄▆█▇▁

Useless against a pinhole sized leak

I had a very small leak from an external tape joint that is corroded

didn't work on leaky towel rail

Size-Overall22%▆▄▅▃▁█
Functionality-Overall14%▅▅▁▃█▁
Defective Material/Parts8%▁▅▁▁█▁
Compatibility-Overall6%█▁▁▆▁▆

FAQ

Common Central Heating Inhibitor questions

Answered from the same tracked data.