The best pool heat pumps, compared.
Top pick: JCKJWL 15 kW listing – Only star line in the set, 5.0 from one review with no written text, at about £176.76. The 9 kg cabinet and the missing COP stay on the page. Best value: JCKJWL 9 kW variant – About £163.00, the lower shelf price of model 393661854. The title still says 15 kW and 9 kW, and there is no star line. Updated October 2026.
A pool heat pump sits on the filter circuit and moves heat from outdoor air into the water, so the heat delivered can be several times the electricity used. In the UK that suits an above-ground or pool, or a garden in-ground pool. You tell a serious machine from a title by output and at about 15°C air and 26°C water, a titanium coil, filter flow, and a 230 V supply. They claim 9 kW to 18 kW and do not state a, a flow, a refrigerant or a UK plug. Puts a typical outdoor-season at about 3.5 to 4.5. The [pool heat pump buying guide](/hub/pool-care/pool-heat-pump/sub/pool-heat-pump-buying-guide) sets the checks before you size a pool from a title. A figure taken only in warm air overstates a UK May morning. Sellers do not share one compulsory test point.
A pool heat pump sits on the filter circuit and moves heat from outdoor air into the water, so the heat delivered can be several times the electricity used.
18 products checked · 56 hrs invested · +18,400 readers
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Personal buying guide
Question 1 of 2
What do you want on the page before you pay?
The JCKJWL listing at about £176.76 on amazon.co.uk puts 15 kW in the title and describes a cabinet of 57.99 x 13 x 38 cm weighing 9 kg. That depth and mass sit far below published cabinets for named heat pumps of a few kilowatts, so the kilowatt line has no test point beside it. The listing shows 5.0 from 1 review, and no review text is printed, so the stars do not describe heat, noise, or a fault. Voltage, COP, flow, refrigerant, hose size, and plug type are not stated. The bullets claim a digital controller and mention water spas, and the casing is given as galvanised sheet or stainless steel rather than a titanium coil. Model 393661854 is the same number used on the 9 kW and 18 kW titles in this set. You cannot size a pool from this page until a seller states output at a named air temperature and water temperature.
Pros
Cons
Best for: Checking how a listing at about £176.76 is worded, when you will not treat 15 kW as a measured output.
Less suitable: A chlorinated or salt-water pool that needs a titanium coil, a flow rate, and a cool-weather COP.
Specifications
Common questions
What output does the JCKJWL 15 kW listing claim?
The title variant and the bullets both say 15 kW. The listing does not state the air temperature or water temperature used for that figure.
Does this listing state voltage, COP or water flow?
No. Voltage, COP, refrigerant, flow rate, hose size and plug type are not stated.
How many amazon.co.uk reviews does it have?
The listing line says 5.0 out of 5 from 1 review. No review text is printed.
This JCKJWL page costs about £163.00 and prints 15 kW in the title with 9 kW in the bracket, while the bullets still say a power rating of 15 kW. The cabinet is the same 57.99 x 13 x 38 cm and 9 kg as the other 15 kW title, and the model number is again 393661854. The listing has no customer-review line, so there is no star rating to set against that conflict. COP, voltage, flow, refrigerant, and connections are not stated. A digital controller is claimed, the casing is given as galvanised sheet or stainless steel, and the bullets mention water spas. At about £163.00 it is the cheaper of the two JCKJWL rows, but the page never says which kilowatt figure would be in the box. Treating the bracket as the specification and the bullets as the specification produces two different machines.
Pros
Cons
Best for: A price check against the listing at about £176.76 of the same model number.
Less suitable: Anyone who needs one output, one supply, and a review count on the same page.
Specifications
Common questions
Is this the 9 kW or the 15 kW unit?
The title says 15 kW and the bracket says 9 kW. The bullets still say a power rating of 15 kW. The listing does not resolve that.
Does the listing give a COP or a flow rate?
No. COP, voltage, flow, refrigerant and connections are not stated.
Is there an amazon.co.uk star rating?
The listing has no customer-review line, so the rating is not stated.
OUHFCASN is the lowest shelf price in this set, at about £154.44, and the chosen variant in the title is 18 kW at 380 V. A UK domestic socket is 230 V with a BS 1363 plug, and 380 V is not that supply. The title also says 220/380 V and lists a span from 5.5 to 18 kW, so one page stands in for several machines. Weight, COP, a controller, the casing, and a review line are not stated. The rank shown is 176 in Pool Heaters, not in Pool Heat Pumps. The listing asks what the heater is made of and does not answer. A 380 V connection is an electrician's job, and this listing does not show a UK plug or a flow rate you could match to a filter.
Pros
Cons
Best for: A site that already has a 380 V supply and an electrician, if you still demand a data sheet before you pay.
Less suitable: A household expecting a 13 A plug and a coefficient of performance at a stated air temperature.
Specifications
Common questions
What supply does the OUHFCASN listing state?
The chosen variant in the title is 380 V. The title also says 220/380 V. It does not say 230 V or mention a BS 1363 plug.
What is it made of?
The listing asks what the heater is made of and does not answer. Casing and heat exchanger are not stated.
Is there a review count?
No customer-review line is on the listing. The rank shown is 176 in Pool Heaters.
The Generic listing at about £180.99 says 15 kW in the title and uses the model number KM-k3XsVd-White-18KW, so the page disagrees with itself about output. Dimensions, weight, COP, flow, and a star line are not stated. The listing asks whether the unit runs on 220 V and 380 V and does not answer. The bullets claim a digital controller, mention spas and hot tubs, and refer to a wide range of pool sizes without a volume. The listing date is 21 June 2026, and the page uses the same main image as the JCKJWL listings. The casing claim is again galvanised sheet or stainless steel. With no mass and no cabinet size, there is less to check here than on the 9 kg pages that at least print a measurement.
Pros
Cons
Best for: A side-by-side of listing text, if a data sheet from another seller already states the output.
Less suitable: A first purchase, because weight, voltage, and a test point are not on the page.
Specifications
Common questions
Does the Generic listing say it runs on 220 V and 380 V?
The listing asks that question and does not answer it. Voltage is not stated.
What output is claimed?
The title says 15 kW. The model number is KM-k3XsVd-White-18KW. No test condition is given.
Is a pool volume stated?
No. The bullets say a wide range of pool sizes and do not give a volume or a flow rate.
This listing costs about £206.00, the highest price in the set. The title bracket says 18 kW and the bullets say a power rating of 15 kW, with no air temperature or water temperature attached to either figure. The technical details give 19 kg on the same 57.99 x 13 x 38 cm cabinet used for the 9 kg JCKJWL pages, and the model number is again 393661854. There is no star line. The rank is 436,470 in Garden and 13 in Pool Heat Pumps, which records sales position rather than a heating test. The casing claim is galvanised sheet or stainless steel. Plug, voltage, COP, and flow are not stated. The extra pounds buy a heavier printed mass and a higher rank line, not a resolved specification.
Pros
Cons
Best for: Comparing a sales rank with the other four pages, if you treat that rank as popularity only.
Less suitable: Choosing an 18 kW machine, because the bullets and the sister listings do not agree on output or weight.
Specifications
Common questions
Is the claimed output 15 kW or 18 kW?
The title bracket says 18 kW. The bullets say a power rating of 15 kW. No test condition is stated.
How heavy is it on the listing?
The technical details say 19 kg and 57.99 x 13 x 38 cm. The same model number on two other listings is 9 kg.
Does it state a titanium exchanger or a UK plug?
No. The casing claim is galvanised sheet or stainless steel. Plug, voltage, COP and flow are not stated.
Five amazon.co.uk listings were read on 19 October 2026 against the fields a pool heat pump page needs: output at a named air and water temperature, COP, coil, flow, and a supply that fits 230 V. There was no laboratory heat test. A star line with one review and no written text is recorded, and it does not make a listing a lab winner. The five weights below sum to 100.
Output at a cool test point
25%Heat output counts when the listing names the air and water temperatures. A warm-air peak is not the UK May figure. None of these five pages state output at about 15°C air and 26°C water.
COP and water coil
20%COP at that cooler point, and a titanium coil for chlorine or salt. None of these listings state a COP, a refrigerant, or a titanium exchanger. A galvanised or stainless casing line is not a coil.
Supply for a UK socket
25%A BS 1363 plug is 13 A at 230 V. A kilowatt in the title may be heat output or electrical input. Only one listing names a voltage, and that variant is 380 V.
Listing consistency
15%Shared model numbers, a shared main image, and a title that disagrees with the bullets are deductions. Three pages use model 393661854 at two different weights.
Price against stated fields
15%Shelf price in GBP against the fields actually printed. The lowest price alone is not best value when the only stated supply is 380 V.
A pool heat pump in this comparison is a machine on the filter circuit, not a plug-in resistance heater. On these five amazon.co.uk listings the shelf runs from about £154.44 to about £206.00. Start with output at a cool test point, then COP and the coil, then whether the supply is 230 V. One review is not a reliability record.
A pool heat pump sits on the filter circuit and moves heat from outdoor air into the water. The heat delivered can be several times the electricity used. That ratio is the coefficient of performance. In the UK the buyers are households with an above-ground Intex or Bestway pool, or a garden in-ground pool, who want more than a few warm weeks. SPATA puts a typical outdoor-season COP at about 3.5 to 4.5 and says a first warm-up in under five days is generally unlikely.
A 15 kW title may mean heat output or electrical input. A BS 1363 plug is 13 A at 230 V. Only an amp figure tells you which, and these pages do not print one. The 380 V variant is not a domestic socket.
SPATA puts a typical outdoor-season COP at about 3.5 to 4.5. A warm-air peak overstates a UK May morning. None of these five listings state a COP at all.
A cover is part of the heat load. Dose chemicals downstream of the heat pump, after the dose is diluted. Strong chlorinated water through the coil is a fault you can avoid.
A BS 1363 plug is 13 A at 230 V, in the order of 3 kW of electrical input. A 15 kW or 18 kW title may mean heat output or electrical input. Only the amp figure tells you which, and none of these five listings print an amp figure or a BS 1363 plug. The OUHFCASN page is the only one that names a voltage. The chosen variant is 380 V, and the title also says 220/380 V. That is not a UK domestic socket. Leave the extension lead unused.
COP is the heat delivered divided by the electricity used, at a named air temperature and water temperature. SPATA puts a typical outdoor-season figure at about 3.5 to 4.5. A COP taken only in warm air overstates a UK May morning, and a COP of 14 is not the seasonal number. None of these five listings state a COP, a refrigerant or a titanium water coil. The casing line, where it exists, is galvanised sheet or stainless steel. Titanium is the usual coil for chlorine and salt water.
Three typical situations, each with a recommendation from this comparison.
You have an Intex or Bestway pool and you need a UK plug, hose tails and a cover. None of these five pages state a BS 1363 plug or a hose size. The JCKJWL 15 kW listing is the page to read first, because it is the only star line, and the 9 kg cabinet is the check that fails before you pay.
An in-ground pool needs a hardwired unit, a bypass and an electrician. The OUHFCASN listing is the only page that names a voltage, and that variant is 380 V. It fits a site that already has that supply, and only after a data sheet states output, flow and the coil.
You are looking at model 393661854 on two JCKJWL pages. The page at about £163.00 is the lower shelf price. The title still prints 15 kW and 9 kW, and there is no star line. It is the best value as that cheaper page, with the conflict still on the listing.
The top pick in this set is the JCKJWL 15 kW listing at about £176.76. It is the only amazon.co.uk page here with a star line, 5.0 from one review, and no written review is shown. The cabinet is 57.99 x 13 x 38 cm and 9 kg, model 393661854 is shared with two other titles, and COP, flow and plug are unstated. The best value is the JCKJWL 9 kW variant at about £163.00, the lower shelf price of that same model number, while the bullets still say 15 kW. The £154.44 page names 380 V, so the lowest price is not the value pick for a 230 V socket. None of these scores is a lab test.
JCKJWL 15 kW listing
Only star line in the set, 5.0 from one review with no written text, at about £176.76. The 9 kg cabinet and the missing COP stay on the page.
JCKJWL 9 kW variant
About £163.00, the lower shelf price of model 393661854. The title still says 15 kW and 9 kW, and there is no star line.
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 seasonal COP, grants, electrical rules and running cost, 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.
