The best pool heaters, compared.
Top pick: VCYEX 16–43 °C edge heater Best value: Intex solar mat 28685 – About £17.99, with 3.7 from 11,021 reviews, for sun on a storable pool. Hose size is not stated, and cloud still means no extra heat. Updated October 2026.
A pool heater is one of three machines: an inline electric heater after the filter, a solar mat on the ground, or a small mains immersion unit. Most people using these listings are warming a storable above-ground pool. A usable page states a volume, a pump-flow limit, and shock protection that suits a garden socket. The 28685 mats heat only when sun and flow are both real. The [pool heater buying guide](/hub/pool-care/pool-heater/sub/pool-heater-buying-guide) sets the order: type, then volume and flow, then the socket. A circulator, a bypass kit and a gasket pack were left out.
A pool heater is one of three machines: an inline electric heater after the filter, a solar mat on the ground, or a small mains immersion unit. Most people using these listings are warming a storable above-ground pool.
32 products checked · 58 hrs invested · +24,600 readers
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Personal buying guide
Question 1 of 2
When do you need the water warmer?
The VCYEX listing is a small white edge heater at £60.89, with 4.8 from 5 reviews, and the technical details give 21.84 by 14.73 by 7.37 cm. Bullets claim 16 °C to 43 °C, hooks for a bath or paddling-pool rim, and separation of water and electricity. Wattage, weight, and voltage are not stated, so you cannot turn the temperature range into a running cost from the page. Two UK reviews describe a 10-foot paddling pool and a 600 litre pool used as a temperature hold after hot water from the tap, and one reviewer estimated about 36 pence an hour. Criticism is not stated in those two reviews. Five reviews are a small sample next to 121 on the Bestway, and this is not an inline heater for a filter hose. The listing mentions error codes E1, E2, and E3 without defining them.
Pros
Cons
Best for: A paddling pool or a small plunge you already fill warm, when you treat five reviews as a start rather than a verdict.
Less suitable: A frame pool that needs a known wattage and a filter-pump heater, or anyone who ranks 4.8 above 3.3 from 121.
Specifications
Common questions
What wattage is stated?
Wattage is not stated. The stated control range is 16 °C to 43 °C.
Where do the UK reviews use it?
One review describes a 10-foot paddling pool. Another describes holding about 34 °C on 600 litres after a hot-tap fill, with the reviewer's own estimate of about 36 pence an hour.
What are error codes E1, E2, and E3?
The listing says that if those codes appear you should cut the power and wait for the water to cool. It does not define the codes.
The Hyunlai listing is a 2500 W immersion heater at £42.99, with 4.2 from 3 reviews. It weighs 500 g, states a 1.5 m cable, and the bullets say large pools are not recommended. They also claim a thermostat, an alarm, and a cut-off, and they say to unplug before you remove it or test the water. The only UK review on the listing says it heats a bucket quickly. Criticism is not stated because that review does not contain one. Voltage and overall dimensions are not stated. Three reviews are too small a sample to outrank the Bestway's 121 or the Intex mat's 11,021, and the listing itself points you away from a large frame pool.
Pros
Cons
Best for: A bucket or a small volume the listing actually names, if three reviews are enough for you.
Less suitable: A 15-foot frame pool, or a buyer who sorts the aisle by stars alone.
Specifications
Common questions
Is it for a large frame pool?
The bullets say it is not recommended for large pools or a large volume of water. They name buckets and small swimming pools.
How many reviews are on the listing?
The customer-review line is 4.2 from 3. The listing shows one UK review, which says it heats a bucket quickly.
What is the cable length?
The bullets state a 1.5 metre power cable. Voltage is not stated.
This Intex 28685E at £24.49 is the same mat family with the hose sizes printed: 32 mm points and two adapters for 38 mm. Amazon.co.uk shows 3.8 from 5,364 reviews. The listing states a pump up to 1/3 hp or under 7,570 litres per hour, pools under 30,280 litres, and a rise of about 3–5 degrees depending on the pool and the weather. UK reviews again praise sunny-day warmth and complain about kinks, almost no flow, and splits. The material field says Sand, which the product text does not explain, so treat that word as a listing error rather than a specification. At £6.50 more than the £17.99 mat it is the page to open when you need the hose size before you buy. It is still only a solar mat, and a cloudy week leaves the water where the weather left it.
Pros
Cons
Best for: You already want a solar mat and your hoses are 32 mm or 38 mm.
Less suitable: A buyer who only wants the lowest price, or a cloudy week when a mat cannot raise the water.
Specifications
Common questions
Which hoses does this mat state?
The bullets state 32 mm hose attachment points and two B adapters for 38 mm hoses. A full hose length is not stated.
What pump flow is stated?
The bullets say a filter pump up to 1/3 hp or a flow under 2,000 gallons per hour, converted on the listing as 7,570 litres per hour.
Is the material really sand?
The technical-details field says Sand. The title and bullets describe a solar heating mat. Treat Sand as a listing field, not as a confirmed material.
The Intex 28685 at £17.99 is a ground mat that warms water only while the sun is on it and a filter pump is pushing water through. Across 11,021 amazon.co.uk reviews at 3.7, UK buyers describe a warmer return on a clear day, then kinks, lost flow, and leaks after a season. The bullets cap above-ground pools at 30,280 litres and claim a rise of 3–5 degrees, and a separate bullet says the product will not work below 26 °C, which fights that rise claim. Hose size is not stated, so you cannot match 32 mm or 38 mm from this page. Listing fields that say MC4, A++, and a folded knife size are not hose-mat specifications. It is the best value in this set because the shelf price is low and the review file is large, and that still leaves you with no heat under cloud. The sister listing at £24.49 is the one that prints the hose sizes.
Pros
Cons
Best for: A sunny-day top-up on a storable above-ground pool, when you already run a modest filter pump.
Less suitable: A cloudy afternoon, a buyer who needs a hose size printed on the page, or anyone who wants heat without sun.
Specifications
Common questions
Does this mat use electricity to heat?
No heating element is stated. The bullets describe solar heating and a rise of 3–5 degrees. A separate bullet says it will not work below 26 °C.
What hose size is included?
Hose size is not stated on this listing. The included parts line says a solar mat and a fixing kit.
How large a pool is stated?
The bullets say above-ground pools up to 8,000 gallons, which the listing converts as 30,280 litres.
The Bestway at £139.99 is the only inline electric heater in this set, titled 2.8 kW, for above-ground pools, with an RCD and a water-sensor switch in the bullets. The listing claims a rise of around 1 °C an hour up to 40 °C, and the same page shows 3.3 from 121 reviews. Reviewers who are pleased use a cover and a pump the heater will accept. Repeated complaints are a hot plug, melted extension leads, no temperature target, and a beep when flow stops. Voltage, a flow limit, and a parts list are not stated on the Amazon bullets. The manual, not this listing, is where the 3,785 litres-per-hour cap and the instruction to keep people out of the pool sit. It is the top pick for a storable pool that needs heat without sun. That does not mean the plug complaints are solved, or that you can swim while it runs.
Pros
Cons
Best for: An above-ground pool on a proper outdoor socket, with a pump the heater accepts and a cover on overnight.
Less suitable: A buyer who will run it from a coiled extension lead, or anyone who wants heat while people are in the water.
Specifications
Common questions
Does this Bestway heater need a filter pump?
Yes. The listing says it is compatible with sand and cartridge filter pumps. It does not describe a pump of its own, and UK reviews say it will not circulate water by itself.
Can you set a target temperature?
The listing states a maximum of 40 °C and a rise of around 1 °C per hour. It does not state a setpoint. UK reviews describe on and off only, with a cut-out at 40 °C.
Is saltwater use stated?
Saltwater use is not stated on this listing.
The Ginger Tech listing is a 2000 W immersion rod at £28.99, not a heater you plumb after the filter. Amazon.co.uk shows 3.0 from 39 reviews. Bullets claim a stainless guard, an LCD, and auto shut-off, and the stated size is 750 g and 9.5 cm long. Voltage is not stated. UK reviews on the listing include a plug that got hot quickly, a report of about 2.5 kW draw, trips, a dead element, and no useful heat in a pool, alongside one overnight use on a 4 m by 1.2 m pool. Included parts are listed as no. A 3.0 from 39 is a real sample of problems, which is why this rod is not a pick for a family above-ground pool. One reviewer finding a timer, rather than the thermostat the title suggests, is part of that same thin specification.
Pros
Cons
Best for: A bucket or a very small volume, if you accept the review pattern and keep people out of the water while it is plugged in.
Less suitable: A frame pool you want to swim in, or a buyer looking for an inline heater after the filter.
Specifications
Common questions
Is this an inline pool heater?
No. The listing describes a portable 2000 W immersion heater for buckets, camping, or small pools, with a stainless guard.
Does the listing state a voltage?
Voltage is not stated. Wattage is stated as 2000 W.
What do the UK reviews say about the plug?
Reviews on the listing include a plug that got hot quickly, a report of about 2.5 kW draw, trips, and a dead element, alongside buyers who heated a small pool or a bin.
The Afenau listing is a 2500 W immersion rod at £27.89, meant to be lowered into water rather than plumbed after a filter. The bullets name a 304 stainless casing, a 5.9-foot cord, a dry-boil cut-off, and an earthed 240 V socket, and they tell you to unplug before you test the water. Weight is 650 g and length is 17 inches. Uses listed include pools, baths, and fish tanks, with no pool volume, so you cannot match it to an 8-foot or 15-foot frame pool from the page. Amazon.co.uk review score and review count are not stated. Nothing in the listing makes this an inline heater with a flow limit. A mains rod in occupied water sits in a product class where other heaters have been recalled for shock, and that recall is not a test of this ASIN.
Pros
Cons
Best for: Reading a submerged 2500 W rod listing, when you will not treat a missing review count as a clean record.
Less suitable: A family frame pool, or anyone who wants a filter-hose heater with a stated RCD.
Specifications
Common questions
What supply does the listing state?
The bullets say an earthed 240 V AC socket, after the heater is fully submerged.
Is there a review count?
The listing has no customer-review line, so the rating is not stated.
Can you test the water while it is plugged in?
The bullets say never test the water temperature before unplugging, and to wait 30 seconds after heating stops before you remove it.
The SKJJM listing is a 2500 W immersion rod at £33.99, in silver stainless steel, at 750 g, with a 5.9-foot cord. Bullets claim a thermostat, an alarm, a dry-burn cut-off, a cool-touch handle, and a grounded cable, and they say to keep hands away while it heats. Voltage, dimensions, and a pool volume are not stated. Included parts are listed as no. There is no customer-review line, so stars and review count are not stated, and you cannot tell whether the thermostat claim holds in a pool. It is not described as a unit that sits in the filter hose. At £33.99 it costs more than the Afenau rod without adding a review file or a litre limit you can check.
Pros
Cons
Best for: Comparing immersion-rod wording, when you will not buy on a missing star line.
Less suitable: An above-ground pool with a filter pump, where a mat or the Bestway is the stated fit.
Specifications
Common questions
Is a review score stated?
No. The listing has no customer-review line.
What does the listing say about hands in the water?
The bullets say keep hands away from the pool while heating.
What is included?
Included components are listed as no. Voltage and overall dimensions are not stated.
This listing is sold under the brand name generic at £42.93 for a stated 2000 W. The title mixes pool, bath, solar, and immersion, while the bullets claim fast heating, automatic power off, and compatibility with various pool sizes, without a litre figure. Voltage, weight, dimensions, material, and plug type are not stated. There is no customer-review line and no review text on the listing. The model number is ZBDAKDDZD. Nothing on the listing shows an RCD, a flow sensor, or a hose connection. At £42.93 it is dearer than rods that at least print a voltage or a cable length, and the word solar in the title does not make it a mat.
Pros
Cons
Best for: Seeing how thin a £42.93 pool-heater title can be before you buy.
Less suitable: Any pool where you need a hose size, a review count, or a solar mat that states it has no element.
Specifications
Common questions
Is this a solar heater?
The title includes the word solar. The bullets describe a 2000 W portable heater with automatic power off, not a solar mat.
What plug does it use?
Plug type is not stated, although the colour field reads Uk 2000W.
Are there reviews?
No customer-review line and no review text are on the listing.
Nine amazon.co.uk listings were scored on 19 October 2026 from the fields on the display rows, the UK review notes in those rows, and the public limits in the research digest. This was not a laboratory heat test. Wattage, flow and temperature rise are listing or manual claims. A missing review line scores as no Amazon evidence. The four weights below sum to 100.
Amazon evidence
25%Star rating on amazon.co.uk, then a small addition for review count. No review line scores 0. A sample under 10 is capped, so 4.8 from 5 cannot outrank 3.3 from 121 on this block alone.
Listing fit
40%A type you can match to a pool, a stated power or a stated lack of an element, a volume or a pump limit, and a safety line you can read. An inline heater with an RCD and a flow sensor scores above a rod with no volume. Junk fields such as MC4, A++ or Sand are deducted. A flow cap that exists only in the manual, not on the Amazon bullets, is not credited as a listing fact.
Review outcome
20%UK comments that describe a warmer return in sun, or a small pool that warms under a cover, score. Kinks, leaks, a hot plug, trips, no useful heat, and a beep when flow stops are deducted. No review text stays low. A single happy bucket review does not fill this block.
Value
15%Shelf price in GBP against a job the listing can still do. The lowest price does not win when the page has no review line and no pool volume. The £17.99 mat scores here because the sunny-day job has 11,021 reviews behind it. The £24.49 mat is the same family with hose sizes printed, not a second value badge.
A pool heater in this comparison is an inline resistance heater, a solar mat, or a small immersion unit, not a heat pump. On these nine amazon.co.uk listings the shelf runs from about £17.99 to about £139.99. Start with the type, then volume and flow, then whether the socket and the RCD suit a garden. A large review count that names a fault you can live with beats 4.8 from five reviews.
A pool heater in this UK set is an inline electric resistance heater, a solar mat after the filter, or a small mains immersion unit sold in the same amazon.co.uk aisle. Buyers are mostly heating a storable above-ground pool. What you can check on the page is a stated volume, a pump-flow limit, and shock protection that suits a garden socket. A circulator, a bypass kit and a gasket pack were left out. Heat pumps stay in their own category. This page does not quote a heat-pump price or a COP.
The Bestway 58259 manual says nobody in the pool while the heater runs, and no extension cord. A stated RCD does not make a coiled lead acceptable. UK reviews on that listing include a hot plug and melted leads. A 2.8 kW load is about 12 A on a 13 A plug.
Intex ties the rise to the pool and the weather. UK reviews describe little useful heat when the sun is not on the mat. One bullet on the £17.99 page says it will not work below 26 °C. A single mat on a large pool in cloud is the mistake the reviews already describe.
MC4, A++, a knife size, and the word Sand are not hose-mat specifications. A 4.8 from five reviews cannot outrank 3.3 from 121 on sample size. No review line is missing evidence, not a spotless record. OPSS recalls of other immersion heaters are not a test of these six ASINs.
Inline electric if you need heat without sun and the pool fits the manual. A solar mat if you swim on sunny days and already run a modest pump. An immersion rod is a different object: it is lowered into the water, and several of these pages state no pool volume. The Bestway 58259 manual caps flow at 3,785 litres per hour and aims at pools of about 15 foot and smaller. Two copies disagree on the upper volume, 17,035 litres versus 18,930 litres.
A 2.8 kW load is about 12 A on a 13 A BS 1363 plug. The Bestway manual wants a 30 mA RCD, bans extension cords, and says not to run the heater while people are in the pool. BS 7671 regulation 411.3.3 requires that 30 mA protection for outdoor equipment up to 32 A. Section 702 is the pool-zone section. A new outdoor circuit is an electrician's job. The RCD on the Bestway bullets does not make a coiled extension lead acceptable. Afenau states an earthed 240 V socket.
Three typical situations, each with a recommendation from this comparison.
You have an 8- to 15-foot above-ground pool, a modest filter pump, and you only want a few degrees when the sun is out. The Intex solar mat at about £17.99 is the best value for that job, with 3.7 from 11,021 reviews. If you need the hose size printed before you buy, the £24.49 listing states 32 mm points and 38 mm adapters.
You will pay the unit rate and you can use a proper outdoor socket, not a coiled extension lead. The Bestway 2.8 kW at about £139.99 is the only inline heater in the set, with an RCD and a water sensor stated. Keep people out of the pool while it runs, and put a cover on overnight.
A paddling pool needs an adult within arm's reach more than a mains rod in the water. The VCYEX edge heater at about £60.89 claims 16–43 °C and has two UK notes on small volumes, from 4.8 across 5 reviews. Wattage is not stated, so five reviews are a start, not a verdict.
The top pick is the Bestway 2.8 kW inline heater at about £139.99. It is the only inline electric heater in the set, with an RCD and a water sensor stated, and amazon.co.uk shows 3.3 from 121 reviews. UK reviews also mention a hot plug, no temperature you can set, and a beep when flow stops. The best value is the Intex solar mat 28685 at about £17.99, with 3.7 from 11,021 reviews, for a sunny-day rise only. A cloudy afternoon leaves that mat with no extra heat. The £24.49 sister listing prints the hose sizes and does not take a second value badge.
Intex solar mat 28685
About £17.99, with 3.7 from 11,021 reviews, for sun on a storable pool. Hose size is not stated, and cloud still means no extra heat.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources for the unit rate, the Bestway manual limits, outdoor RCD rules and the immersion-heater recall class, taken from the research digest. Listing prices, stars and review counts are from amazon.co.uk on 19 October 2026.
This page contains affiliate links to amazon.co.uk with the tag pcuk26-21. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines checked on 19 October 2026. We did not run a lab test.
