Best Air Mattress 2026: 41,147 Ratings at £14.99

By · Updated

An air mattress is bought for one of two reasons, and both of them are dates: guests are arriving, or a tent is going up. It is the least romantic purchase in the bedding aisle and the one where British buyers behave most rationally — which is why this article looks less like the mattress articles elsewhere on this site and more like a market report. Six listings, one brand, and a price ladder from £14.99 to £64.99 in which almost nothing except the pump changes.

Intex takes five of the six places, and that is not a lazy ranking: it is what the shelf looks like. The brand that invented the inflatable beam owns the category's volume, and the proof is in the samples. The cheapest mattress here, at £14.99, carries 41,147 ratings with sixty-six per cent of them at five stars — a number that would be a headline on any memory foam mattress this site has covered, attached here to a bed that fits in a cupboard. The second, at £15.45, has 6,845. The premium OlarHike at £64.99 has 1,713. Whatever else an air mattress is, it is the one bedding product British households buy again and again, which is exactly what a category with a puncture risk should look like.

What separates the six is the pump. The two cheapest need one and do not include it — a foot pump for the twin, a separate pump for the full-size — and everything from £36.79 upwards arrives with inflation built in: a USB pump on the Prestige mid-rise, which the listing calls convenient and which genuinely can run from a phone charger, a car socket or a power bank; and a 220 to 240 volt mains pump on the pillow rest, the only one here that asks for a wall socket. Between those worlds sits a £19.70 twin whose fibre-tech beams are the same construction as the £64.99 double, and a £64.99 double whose extra money buys height — forty-six centimetres, twice most of this list — and a three hundred kilogram limit.

Then there is the paperwork, which in this category is where the honesty leaks. One mattress here declares its weight as 320 grams. Not 3.2 kilograms, which would be light for a bed with a pump; 320 grams, the weight of a bag of pasta, attached to a double airbed in a listing whose own dimensions line reads 137 by 191 by 25 centimetres. Another measures itself in centimetres and metres inside the same sentence — 99cm, 1.91m, 25cm — for the same bed that its five siblings describe entirely in one or the other. And one answers the shape question with a piece of geometry: rectangular prism. It is the same answer four listings give in the camping mattress article this site published alongside this one, across two categories and four brands, which makes it a habit rather than a typo.

None of that stops an air mattress doing its job, and at these prices none of it should. The serious cases are the ones to decide first: a USB pump is the difference between inflating a guest bed in a spare room and inflating one at a festival with no power, and the fibre-tech beam construction that Intex uses from £15.45 upward is the thing that stops these beds turning into hammocks by the second night. The wildcard is that 41,147 rating sample — the sort of evidence that, on this site, usually belongs to a mattress costing twenty times more.

At a glance

Free WhatsApp group

Amazon deals, around the clock

Price drops and lightning deals posted the moment they go live. No spam, leave whenever you like.

Join the group

Free to join · Leave any time

1

Intex Classic Full-size Inflatable Downy AirBed

Intex Classic full-size inflatable Downy AirBed
£14.99 4.2 41,147 reviews

£14.99 with 41,147 ratings — and a review field that contains Amazon's JavaScript rather than a rating.

Pros

  • 41,147 ratings at 4.2 stars: the largest sample here
  • 66 per cent five-star, 9 per cent one-star
  • Full-size: 137 by 191 centimetres of sleeping space
  • Fibre-tech beam construction, the same as the £64.99 entry

Cons

  • No pump included: buyers supply their own
  • The review field holds Amazon's JavaScript, not a rating
  • Ultra-lightweight, in a listing that never says what that means
  • £14.99 buys the bed only

Why it is number 1

Ratings
4.2 from 41,147 The largest sample in this article
Distribution
66 per cent five-star, 9 per cent one A distribution forty-one thousand buyers thick
Size
137 x 191 x 25 cm Full-size, stated in centimetres
Pump
Not included The reviews mention bringing your own
Spec sheet
Contains Amazon's JavaScript A review widget inside a data field
Beam construction
Fiber-Tech The same build as the £64.99 double

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Fantastic. Vey good quality. Delived on time.”

Ryan
Verified purchase

“Really good quality very comfy and with right pump is ready to go in 3 minutes”

mr t a young
Check Price on Amazon More about the Intex Classic Full-size Inflatable Downy AirBed

The cheapest mattress in this article carries the largest sample, and the gap is not close: 41,147 ratings, sixty-six per cent of them at five stars and nine per cent at one. For scale, that is the sort of volume this site's memory foam articles treat as exceptional at ten times the price. The Intex Classic is a full-size flocked airbed, 137 by 191 by 25 centimetres, built on the fibre-tech beams the brand uses across this whole list, and it arrives without a pump — a detail worth knowing, and one that its own buyers mention.

The listing's paperwork has a defect that says something about how these pages are assembled. Its specification table contains a field called Customer Reviews whose value is not a rating but a fragment of Amazon's own code: the stars, the count, and then a variable name and a script trigger trailing off into the widget. It is the same intrusion this site found in the specification table of a stove fan and a sleeping bag, where the page's machinery ended up inside the product's data. The same table gives the brand as Intex, the shape as rectangular, and the model as 64758.

The two reviews on the page are also worth reading for their spelling rather than their sentiment: one reports that the bed is very good quality and was delivered on time, with both words slightly misspelled, and the other says that with the right pump it is ready in three minutes, which is the most useful sentence on the page, because it tells the buyer that the pump is not in the box. Neither is a complaint. That is the pattern of a category where a £14.99 bed that needs a £6 accessory still earns forty-one thousand ratings at four point two stars.

2

Intex Twin Dura-Beam Series Single High Airbed

Intex Twin Dura-Beam single high airbed in taupe and grey
£15.45 4.2 6,845 reviews

£15.45 with 6,845 ratings — and a size line that mixes centimetres with metres.

Pros

  • 6,845 ratings at 4.2 stars for a £15.45 bed
  • 65 per cent five-star, 9 per cent one-star
  • Flocked top with a vinyl base, as the listing states
  • The same fibre-tech beams as the £64.99 model

Cons

  • One size only: 99 centimetres wide
  • No pump in the box
  • Its own size line mixes cm and metres
  • The type field says standard mattress

Why it is number 2

Ratings
4.2 from 6,845 A serious sample for the price
Distribution
65 per cent five-star, 9 per cent one Consistent with the full-size model
Inflated size
99cm x 1.91m x 25cm Centimetres and metres in one line
Top
Quality tested flocked Stated, and vinyl underneath
Type
Standard Mattress The field repeats the object's name
Price
£15.45 The cheapest twin here

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Excellent value & a comfortable nights sleep 😴”

L. TOLLEY
Verified purchase

“Very goo quality and easy to blow nice and comfy”

Ruvinie fernando
Check Price on Amazon More about the Intex Twin Dura-Beam Series Single High Airbed

The single-bed choice in this article, and the cheapest way to get the construction that the rest of the list uses to justify its prices. Six thousand eight hundred and forty-five ratings at 4.2 stars, sixty-five per cent of them five-star, for a taupe and grey twin that matches the full-size mattress above it in every respect except the width: ninety-nine centimetres against one hundred and thirty-seven. For one sleeper, that is the whole difference, and it costs forty-six pence more.

Its size line is the best example in this article of how these listings mix their units: approximately ninety-nine centimetres by one point nine one metres by twenty-five centimetres, all three measurements in one sentence, two of them in different units. Every other Intex here gives the same kind of figure entirely in centimetres. It is the same failure of scale this site found in a memory foam mattress whose thickness was recorded as nought point two five centimetres, with the value correct in two other fields: somebody entered the number in one unit and the label in another, and nobody noticed on the way to the shelf.

The specification table also answers the question of type with the words standard mattress, which is the name of the object rather than a description of it, and one of the two reviews arrives with a sleeping-face emoji that the collection process has preserved as four stray characters — a small scar that will be familiar to anyone who has ever copied a review into a spreadsheet. Buyers here are otherwise consistent with the rest of the list: excellent value, comfortable for a night, and easy to inflate. The flocked top and vinyl base are the details the listing actually defends, and at this price they are the right ones to defend.

3

Intex Dura-Beam Prestige Mid-Rise Air Mattress with USB Pump

Intex Dura-Beam Prestige mid-rise air mattress with built-in USB pump
£39.85 4.3 4,836 reviews

£39.85 with a USB pump and the only stated inflation time in this article: 5.5 minutes.

Pros

  • 4,836 ratings at 4.3 stars, with 67 per cent at five
  • Built-in USB pump: charger, car socket or power bank
  • A stated inflation time of 5.5 minutes
  • Mid-rise height, above the base models

Cons

  • £39.85, against £14.99 for the best-selling model
  • The model name field reads like a headline
  • Mid-rise is neither the low nor the tall option
  • The USB pump needs a power source you bring

Why it is number 3

Ratings
4.3 from 4,836 Third-largest sample, best big distribution
Distribution
67 per cent five-star, 7 per cent one 7 per cent is the best of the large samples
Pump
Built-in USB, 5.5 minutes The only stated inflation time here
Height
Mid-rise The only specification without a number
Model name
Twelve words A headline in a model field
UPC
078257641147 A real identifier, unlike its siblings

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Really good mattress. Very easy to inflate and deflate”

Patrick McGlynn
Verified purchase

“Air beds are not what they used to be - they actually afford you a decent nights kip now!!”

Crossy
Check Price on Amazon More about the Intex Dura-Beam Prestige Mid-Rise Air Mattress with USB Pump

This is the mattress in the article that answers the question the others leave open. Its built-in pump runs on USB, which in practice means a phone charger, a car socket or a power bank — the listing lists all three — and it is the only page here that tells a buyer how long the job takes: approximately five and a half minutes, stated in its special features field beside the fibre-tech construction and the model name. Given that this list runs from a mattress with no pump at all to one that needs a wall socket, that single number is the most useful specification in the article.

It is also worth noticing how the listing is written, because it is the most self-consciously formatted of the six. Its bullet points each open with a check mark, as if the seller had decided to pre-tick the buyer's list: fibre-tech beam construction, durability, built-in USB electric pump, and a paragraph about bottom ring stability that explains why these beds do not dip. The model name field, meanwhile, contains twelve words and reads like a headline — Dura-Beam Standard Series Prestige Mid-Rise Airbed with Fastfill USB Powered Internal Pump — which is a very long way from the model numbers the other five offer, integers like 64114 and 64758.

At 4,836 ratings and 4.3 stars with sixty-seven per cent at five and seven per cent at one, the evidence is the third-largest sample here and the best distribution of the three big ones. What it buys over the £14.99 mattress is the pump, thirteen centimetres of height, and a buyer review that reads like a small piece of social history: air beds are not what they used to be, and this one affords a decent night's kip.

4

OlarHike Inflatable Mattress, Double Air Bed, 135 x 190 x 46cm

OlarHike double inflatable air bed, 135 by 190 by 46 centimetres
£64.99 4.2 1,713 reviews

£64.99, 46cm tall and rated 4.2 stars from 1,713 ratings — with a colour field that reads 46cm(standard Height)black.

Pros

  • 46 centimetres of height: the tallest here
  • A 300 kilogram weight limit, stated in the title
  • 1,713 ratings at 4.2 stars
  • Built-in pump and a breathable, waterproof flocked top

Cons

  • 12 per cent of buyers give it one star: the worst share here
  • The shape field says rectangular prism
  • The colour field contains the height
  • The bullets are set in a decorative font that arrives garbled

Why it is number 4

Ratings
4.2 from 1,713 A solid sample at this price
Distribution
69 per cent five-star, 12 per cent one The worst one-star share in the article
Height
46 cm The tallest mattress here
Shape
Rectangular prism The category's answer to a shape question
Colour
46cm(standard Height)black The height has moved into the colour field
Weight limit
300 kg The only stated limit in this article

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Excellent quality easy to inflate and deflate would highly recommend”

Bellaire
Verified purchase

“Been using for 3 months now and super super comfortable, good quality, great size and compact for storage!”

Barbara
Check Price on Amazon More about the OlarHike Inflatable Mattress, Double Air Bed, 135 x 190 x 46cm

The tallest and dearest mattress in this article, and the only one not made by Intex. Its claim is simple: forty-six centimetres of height, which is nearly twice the twenty-five of the base models here, a three hundred kilogram limit, and a built-in pump that the listing says fills it in three to four minutes. Bought against the £14.99 mattress it is a different object, and the 1,713 ratings at 4.2 stars are enough to establish that it does the job — though with twelve per cent of buyers at one star, it also carries the worst low-rating share in the article, which is a strange thing to say about the most expensive bed on the page.

The listing's data is where the OlarHike is most interesting. Its shape field answers the question with a piece of geometry — rectangular prism — which is an accurate description of an airbed and a useless answer to a buyer deciding between a bed and a mattress topper. It is the same answer this site found in three listings in its camping mattress article, from iDOO, Origem and TREKOLOGY, which makes it a habit of the category rather than a quirk of one seller. And its colour field reads 46cm(standard Height)black, which is a note that the tall version is the black one, wedged into a field that exists to describe colour. This site has seen the same collision before, on mattresses whose size field carried the dimensions, but never with the height placed quite so plainly inside the colour.

The bullets are set in a decorative mathematical bold face, and what reaches the reader — or a scraper, or a search engine — is a run of accented characters where the heading should be. Underneath it the claims are ordinary and specific: an ergonomic coil-beam structure, a ten per cent thicker PVC, three to four minutes of inflation, and a flocked waterproof top layer. The model name field says Luxury Air Bed, which is a promise rather than a model, and at forty-six centimetres and £64.99 it is at least the last bed on this list that can plausibly keep it.

5

Intex Full Pillow Rest Classic Airbed with Fibre-Tech

Intex Full Pillow Rest Classic airbed with built-in electric pump
£36.79 4.4 30 reviews

£36.79, 4.4 stars from 30 ratings — and a weight field that says 320 grams for a double bed with a pump.

Pros

  • 4.4 stars: the highest rating in this article
  • 72 per cent five-star and no one-star reviews
  • A mains pump with a UK type G plug, stated outright
  • An integrated pillow at the head end

Cons

  • Only 30 ratings behind that 4.4 stars
  • The weight field says 320 grams
  • Specific uses: bed
  • Needs a wall socket, unlike the USB model above

Why it is number 5

Ratings
4.4 from 30 The best rating, the thinnest sample
Distribution
72 per cent five-star, no one-star The only clean sheet here
Weight
320 g A double bed with a pump, at a third of a kilogram
Pump
220-240V, type G plug The only UK plug specification here
Specific uses
Bed The use is the object's name
Dimensions
137 x 191 x 25 cm Full-size, and the weight hides in the same line

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Found is really comfortable easy to inflate !!.”

Edith
Verified purchase

“Why did you choose this product over others?:Great mattress filled all expectations”

Evita Korse
Check Price on Amazon More about the Intex Full Pillow Rest Classic Airbed with Fibre-Tech

The best-rated mattress in this article, with the thinnest evidence: 4.4 stars from thirty ratings, a distribution with seventy-two per cent at five and no one-star reviews at all, which for an airbed is close to a miracle. It is a full-size flocked mattress with a pillow built into the head end, fibre-tech beams, and a mains pump — the only one here that asks for a wall socket, and the only listing in this article that specifies its plug as a type G three-pin for the UK market. That last detail is the most useful sentence in the whole article, and it was written by Amazon's own copywriters rather than a seller.

Its specification table contains the error of the article. The mattress weighs, according to its own data, three hundred and twenty grams, and the same figure appears twice: once in the weight field and once at the end of the dimensions line, which reads 137 by 191 by 25 centimetres; 320 g. A double airbed with an electric pump does not weigh a third of a kilogram, and the true value is almost certainly three point two kilograms — a decimal point that went missing, or a unit that was relabelled, exactly as this site found on a memory foam mattress whose thickness was recorded as nought point two five centimetres with the correct twenty-five appearing in two other fields.

The table also answers the question of specific uses with the word bed, which is the object rather than a use, and in doing so joins the shape field responding prism and the type field responding standard mattress in this list. Buyers, meanwhile, are brief and positive, and one of them answers the question the form asks — why this product over others — with the word great, followed by the observation that the mattress filled all expectations. At £36.79 with a mains pump and an integrated pillow, the only real objection is that thirty buyers have said so; the mattress at number one has forty-one thousand.

6

Intex Twin Dura-Beam Prestige Downy Airbed

Intex Twin Dura-Beam Prestige Downy airbed
£19.70 4.2 609 reviews

£19.70, 4.2 stars from 609 ratings — a twin bed that its own bullet describes as being for two people.

Pros

  • £19.70: the second-cheapest mattress in this article
  • 609 ratings at 4.2 stars
  • Wave-beam construction, stated plainly
  • Described as good for travel and camping

Cons

  • A bullet claims it is for two people; the title says twin
  • 12 per cent of buyers rate it one star
  • No pump included
  • The title is set in capitals

Why it is number 6

Ratings
4.2 from 609 Enough to establish the basic job
Distribution
68 per cent five-star, 12 per cent one One star in eight buyers
Construction
Traditional wave beams The only non-fibre-tech Intex here
Size
Twin, 99 cm wide The title and the bullets disagree on capacity
Use
Good for travel and camping The only camping reference in this article
Title
All capitals The only one here

What buyers actually say

Quoted from customer reviews on Amazon

Verified purchase

“Great air mattress comfy well worth the money.”

H Boland
Verified purchase

“Fab to recharge on long days out or weekend away”

Pippadob
Check Price on Amazon More about the Intex Twin Dura-Beam Prestige Downy Airbed

The last of the five Intex mattresses here, and the one that explains the family tree. Its construction is traditional wave beams rather than the fibre-tech used by every other Intex in this article, which means it is the cheapest way to buy the older build and the only entry here that says so in plain words. Ninety-nine centimetres wide, twenty-five deep, rated 4.2 stars from 609 ratings with sixty-eight per cent at five and twelve per cent at one, it is a perfectly ordinary single airbed at a perfectly ordinary price.

What makes it worth reading is its own bullet points. The first says the bed is an Intex Dura Beam Prestige air bed for two people, which is a claim its title contradicts: the title says twin, the width says ninety-nine centimetres, and the price says the same thing all three of the other single-airbed listings say. It is not a lie so much as a template — the same paragraph of copy used on a double elsewhere — and it is the sort of detail that costs a buyer nothing but tells you how carefully the page was assembled. The same bullets describe the mattress as good for travel and camping, which is the only mention of camping in this article and an accurate description of what a £19.70 bed is for.

The title arrives in capital letters, the only one of the six that does, and the reviews are the shortest here: one calls it a great air mattress, comfortable and well worth the money, and the other describes it as fab to recharge on for long days out or a weekend away, which is a verb more usually applied to a phone. At £19.70, with a pump bought separately and the wave beams underneath, it is the sensible last entry in a list where the cheapest mattress has forty-one thousand ratings and this one has six hundred.

Final Verdict

What we would buy. The £14.99 full-size Intex is the one we would buy, and it is almost embarrassing how little argument the data leaves: 41,147 ratings at 4.2 stars with two thirds of buyers at five, a 191 by 137 by 25 centimetre bed that fits two adults, and fibre-tech beams that the £64.99 mattress at number four also uses to justify its price. It does not include a pump, which is the whole catch, and it does not need to: a foot pump costs less than the difference to the next model up. If the bed will live outdoors or away from a socket, the £39.85 Prestige mid-rise is the one to take, because it is the only mattress here that inflates from a phone charger or a car socket and still has 4,836 ratings behind it. If it will live in a spare room, the £36.79 pillow rest is the one we would leave plugged in, since a 220 volt pump is faster and needs no cables. The £19.70 twin is the value pick for one person, provided the buyer accepts that the pump is theirs to buy, and the £64.99 double buys height rather than comfort: forty-six centimetres, roughly double this list, and a three hundred kilogram limit that no guest bed will ever need. What the listings will not tell you. Read the weight if a number looks wrong, because a mattress that weighs 320 grams will float: that figure sits two fields away from a dimensions line that says 137 by 191 by 25 centimetres, on the same listing, which is the same failure this site found on a mattress whose thickness was listed as a quarter of a centimetre. Expect the measurements to mix units inside one sentence — 99cm, 1.91m, 25cm — and expect the shape field to be answered in the language of geometry, since four listings across this article and the camping one reply rectangular prism. Ask which pump comes in the box, because that single question is worth more than the fifty pounds between the cheapest mattress here and the dearest, and no listing will volunteer that its pump is manual. And buy the sample, not the star rating: the mattress at 4.4 stars has thirty ratings behind it and the one at 4.2 has 41,147, and on this site the second one is what first place looks like.

Share this guide

Photo of Felipe Iglesias

Written by

Founder & Lead Reviewer

Felipe is a computational engineering student who has been working in SEO since he was sixteen. He founded ranked10 and researches every guide on the site.

Comments

Reader comments are not checked against the manufacturer's claims above.

No comments yet

Be the first to add something we missed — a price change, a spec that turned out wrong, or how one of these held up.

Leave a comment

No account needed. Own one of these? Tell other readers how it actually performed.

2000 left

Comments with links are checked before they appear. See our privacy policy.

Related buying guides

All Home guides
Home

Best Electric Showers 2026: 10 Ranked, and the kW Claims That Don't Add Up

The best electric showers are sold on one number: the kW rating. In these listings that number frequently contradicts its own advert. The Triton Style 3 appears as 9.5kW in the title, but its first bullet calls it an '8.5kW electric shower'. The Triton Collection 2 (B00BYWSGIQ) says 9.5 KW in the title while its second bullet describes the 'Collection 2 8.5 KW electric shower unit'. And the older 8.5kW version of that same line (B00EUZ5INA) is the dearer of the two: £189.49 against £165.99. We ranked ten of the best electric showers on Amazon UK on stated kW, warranty length, review volume and rating, price per kW, and how well each advert agrees with itself. Three further listings that appear in the same search results are not electric showers at all: the two Bristan units are bar mixers that need a boiler to work, and the Triton AS2000SR is classified as a 'Power Shower', with a bullet offering a '1 YEAR GUARANTEE' against a spec sheet promising 2 years. They were excluded.

Home

Best Blanket Hoodie 2026: Heavyweight, or Lightweight

There is no fabric in this article, no grammage, no length and no size — and that is the whole story of the blanket hoodie market. Seven products, priced between £16.09 and £26.99, rated between 4.5 and 4.7 stars by more than seventeen thousand buyers between them, and not one of them says what it is made of in a way a buyer can compare, how heavy it is in grams per square metre, or how long it hangs below the waist. The word oversized does all the work, and it is not a measurement. What the pages do instead is contradict themselves in ways that would be funny if they were not the only information available. The same Bedsure hoodie appears twice in this ranking's market with the same 5,728 ratings — one review pool sold in grey, the other in mushroom — and the two listings describe its fabric class differently: heavyweight in one, lightweight in the other. It is one garment. Its fur field adds the best line in the article: natural synthetic fur, with the coat origin recorded as non-existent, which is what Amazon writes when the fur came from nothing at all because it was made in a factory. There is a field for sentiment. One listing carries a specification called fit to size sentiment, answered with the word positive — a machine's summary of what buyers thought of the sizing, sitting in a table that has no sizing in it beyond the word one size. And a different listing gives away its own ASIN wrongly: the product is B0B2RXFVW1 and its own ASIN field says B0B9X2QPNC, a typo in the one field that is never supposed to be wrong. Five of the seven pages carry a fragment of Amazon's own page code inside a review field, the same leak this site has now found on an air mattress, an electric heater and a sleeping bag. None of which matters as much as it sounds, because a blanket hoodie is bought by feel. The ratings are the highest of any article this site has published — every product here is rated 4.5 or better, and the worst one-star share in the article is five per cent — which is what happens when a category is bought as a gift, for warmth and for fun. The buyers' own words are better than any specification: one calls it a fat suit that is not flattering but is super comfortable and says their girlfriend loves it, another wore theirs for ten days without stopping, and a third, in Spanish, calls it very comfortable and warm and not as enormous as the others.

Home

Best Electric Heater 2026: 35 Celsius, 16 Kiloamps

An electric heater has one number that decides what it costs to run and how much room it warms, and that number is wattage. Every listing here knows it, every title carries it, and when the specification table is asked for the heat output it answers with something else entirely. The Dreo at £59.99 says thirty-five degrees Celsius. The Amazon Basics at £34.19 says forty-one degrees Fahrenheit. The same Dreo says sixteen kiloamps, which is sixteen thousand amps and would need a substation rather than a three-pin plug. Three products, three answers to the same field, and not one of them is the number a buyer came for. The wattage is not hidden, it is somewhere else — in the title, in the bullets, and in the power settings, which is exactly where the contradictions live. The Belaco convector is advertised as a two thousand watt heater, with a specification table that gives its heat output as seven hundred and fifty watts, the lowest of the three settings the same page lists. And one Warmlite fan heater appears twice in this article's market, in two listings with identical titles, one declaring a thousand watts and the other two thousand — two numbers for the same machine, and two different rating pools behind them. The sizing field is worse, and it is the one a buyer actually needs, because a heater is bought for a room. To judge that you need an area, and this market answers with no unit at all — seventy, then one hundred and eighty — with square feet, with a range, with an abbreviation, with a hedge (two hundred square feet, estimated), with an adjective (small slash medium), and in the case of the cheapest heater here, with nothing: the Amazon Basics at £9.90 has no coverage field at all. The only metric figure anywhere in this article is in a bullet, where a different Amazon Basics says it covers up to eighteen square metres — which is twenty-three square feet more than the listing beside it claims, in a unit that the rest of the market refuses to use. None of that makes these bad heaters, and at these prices it should not. What it means is that the numbers worth trusting are the ones a seller cannot round or relabel: the rating count, the distribution behind it, and the wattage printed in the title. Two of the last three are visible in one field here, and it is the one field nobody fills in by accident — the best sellers rank, where the £9.90 Amazon Basics reports itself as fifth in electric heating, and the BZGG as twenty-fourth.