[{"data":1,"prerenderedAt":1164},["ShallowReactive",2],{"post-en-pool-real-vs-advertised-heat-pump-power":3},{"post":4,"i18nParams":1157},{"id":5,"title":6,"author":7,"body":8,"dateModified":1123,"datePublished":1124,"description":1125,"disableFeedback":1126,"extension":1127,"faq":1128,"image":1147,"meta":1148,"navigation":1149,"ogType":1150,"path":1151,"seo":1152,"spatialCoverage":1153,"stem":1154,"translationKey":1155,"__hash__":1156},"en\u002Fen\u002Fpool\u002Freal-vs-advertised-heat-pump-power.md","Pool heat pumps: 9 kW advertised, 6.4 kW delivered — it all hangs on one line of the spec sheet","Calculhouse",{"type":9,"value":10,"toc":1094},"minimark",[11,15,22,25,47,50,53,58,65,68,73,76,80,87,100,109,112,119,122,183,194,201,205,210,213,228,231,235,238,243,249,253,257,260,281,288,297,300,307,311,314,331,334,338,349,363,370,374,377,381,406,410,653,660,665,669,698,709,712,717,721,728,739,749,754,758,764,776,783,786,791,794,800,809,816,820,823,853,857,860,890,896,900,903,924,927,931,934,952,957,964,968,972,981,985,988,1091],[12,13,6],"h1",{"id":14},"pool-heat-pumps-9-kw-advertised-64-kw-delivered-it-all-hangs-on-one-line-of-the-spec-sheet",[16,17,18],"p",{},[19,20,21],"em",{},"Last updated: 14 August 2026 — Calculhouse",[23,24],"pool-heat-pump-power-hero",{},[26,27,28],"blockquote",{},[16,29,30,34,35,38,39,42,43,46],{},[31,32,33],"strong",{},"In short."," ",[19,36,37],{},"(Private residential pools, in France.)"," A pool heat pump advertised as \"9 kW\" only delivers that figure in\nfavourable conditions (26 °C air). As soon as the air falls towards 15 °C, in spring or\nautumn, real power drops — by ",[31,40,41],{},"about 29 % on average"," across our survey of 10\nreferences (Poolex, Astralpool, GRE, Zodiac, Hayward). For an extended April-to-October\nseason in France, it is the ",[31,44,45],{},"power at 15 °C"," you should be reading, not the headline\nfigure. And two models are only comparable if they are quoted in the same test condition.",[16,48,49],{},"Comparing heat pumps for your pool and going by the kilowatt figure on the box? That is the\nnatural instinct — and it is also the surest way to get it wrong. Not because the number is\nfalse, but because it means nothing until you know the condition it was measured in. Here\nis how to read that number properly, once and for all.",[51,52],"article-toc",{},[54,55,57],"h2",{"id":56},"_1-the-trap-of-the-kw-figure","1. The trap of the kW figure",[16,59,60,61,64],{},"Plenty of pool owners pick their heat pump on a single number: \"5 kW\", \"7 kW\", \"9 kW\". It is\nsimple, it is reassuring, and it is incomplete. A pool heat pump does not have ",[19,62,63],{},"one"," power\nrating: it has several, and they move with the outside temperature, the water temperature\nand the humidity of the air.",[16,66,67],{},"So let us put the real question, the one that drives this whole article:",[26,69,70],{},[16,71,72],{},"Does a heat pump advertised at 9 kW really supply 9 kW when you need it most, in spring?",[16,74,75],{},"The short answer: often no — and sometimes yes. It all depends on the condition hidden\nbehind the figure. Learning to spot it is the only skill that really matters when choosing.",[54,77,79],{"id":78},"_2-why-doesnt-a-heat-pump-have-a-single-power-rating","2. Why doesn't a heat pump have a single power rating?",[16,81,82,83,86],{},"Before talking about what is printed, it helps to understand why the power moves. A heat\npump does not \"make\" heat: it ",[31,84,85],{},"takes heat from the outside air"," and moves it into the\npool water. Its performance therefore depends directly on what that air contains:",[88,89,90,94,97],"ul",{},[91,92,93],"li",{},"warm air → plenty of available heat → high delivered power;",[91,95,96],{},"cool air → less heat → reduced delivered power;",[91,98,99],{},"humidity counts too: the damper the air, the more so-called latent heat it carries, and\nthe more the machine can recover.",[16,101,102],{},[103,104],"img",{"alt":105,"height":106,"src":107,"width":108},"A heat pump takes heat from the outside air and transfers it into the pool water",400,"\u002Fillustration-3-principe-pac-en.svg",820,[16,110,111],{},"Hence the central point to take away:",[26,113,114],{},[16,115,116],{},[31,117,118],{},"A heat pump's power is a value measured under precise conditions, not a fixed property\nof the machine.",[16,120,121],{},"French spec sheets mostly use two reference conditions:",[123,124,125,147],"table",{},[126,127,128],"thead",{},[129,130,131,135,138,141,144],"tr",{},[132,133,134],"th",{},"Condition",[132,136,137],{},"Air",[132,139,140],{},"Water",[132,142,143],{},"Humidity",[132,145,146],{},"Use it represents",[148,149,150,167],"tbody",{},[129,151,152,156,159,161,164],{},[153,154,155],"td",{},"Favourable (usually advertised)",[153,157,158],{},"26 °C",[153,160,158],{},[153,162,163],{},"80 %",[153,165,166],{},"High summer",[129,168,169,172,175,177,180],{},[153,170,171],{},"NF-414 standard",[153,173,174],{},"15 °C",[153,176,158],{},[153,178,179],{},"70 %",[153,181,182],{},"Spring \u002F autumn, extended season",[16,184,185,186,189,190,193],{},"In practice, the same machine can show ",[31,187,188],{},"9 kW at 26 °C air"," and deliver only ",[31,191,192],{},"6.4 kW at\n15 °C air"," — same components, same unit, two different conditions. The number changes; the\nmachine does not.",[16,195,196],{},[103,197],{"alt":198,"height":199,"src":200,"width":108},"The same heat pump shows 9 kW at 26 °C but 6.4 kW at 15 °C",470,"\u002Fillustration-1-meme-pac-deux-conditions-en.svg",[54,202,204],{"id":203},"_3-the-two-power-figures-an-owner-needs-to-know","3. The two power figures an owner needs to know",[206,207,209],"h3",{"id":208},"the-shop-window-figure-favourable-condition-26-c","The \"shop window\" figure (favourable condition, ~26 °C)",[16,211,212],{},"This is the one you most often find in large type on sales pages. It is measured in warm\nconditions (air ≈ 26 °C, water ≈ 26 °C, 80 % humidity). To be fair to it:",[88,214,215,222,225],{},[91,216,217,218,221],{},"it represents the machine's ",[31,219,220],{},"maximum potential",";",[91,223,224],{},"it corresponds to a real, standardised test condition, not an invention;",[91,226,227],{},"and, inevitably, it produces the biggest number — so the most saleable one.",[16,229,230],{},"Its only flaw: it does not reflect the power actually available at the start or the end of\nthe season, when the air is cooler.",[206,232,234],{"id":233},"the-power-at-15-c","The power at 15 °C",[16,236,237],{},"This is closer to real extended use at our latitudes: warming the pool back up after winter,\nspring mornings, the tail end of autumn.",[26,239,240],{},[16,241,242],{},"To size an outdoor pool heat pump in France for an extended season, the power around\n15 °C is the most useful piece of information.",[16,244,245,248],{},[31,246,247],{},"An important nuance, worth remembering:"," some brands already publish their power at\n15 °C. So not everyone \"inflates\" their figure — more on that below.",[54,250,252],{"id":251},"_4-what-this-difference-changes-in-practice","4. What this difference changes in practice",[206,254,256],{"id":255},"power-heating-speed","Power = heating speed",[16,258,259],{},"Two ideas that often get confused:",[88,261,262,272],{},[91,263,264,267,268,271],{},[31,265,266],{},"Power (kW)"," = the ",[19,269,270],{},"rate"," at which you heat the water.",[91,273,274,267,277,280],{},[31,275,276],{},"Energy needed (kWh)",[19,278,279],{},"total amount"," of heat you must supply to reach the\ntemperature you want.",[16,282,283,284,287],{},"A rough order of magnitude, for a 50 m³ pool: it takes ",[31,285,286],{},"about 58 kWh to gain 1 °C",".",[26,289,290],{},[16,291,292,293,296],{},"Careful: those 58 kWh are a ",[31,294,295],{},"theoretical minimum, before losses",". In real conditions,\nevaporation, wind and night-time cooling raise the requirement noticeably. If you time it\nat home you will always find it takes a bit longer — that is normal.",[16,298,299],{},"For the same requirement, a pump delivering 7 kW heats faster than one delivering 5 kW.\nPower does not change how much heat you have to supply; it changes how long it takes.",[16,301,302],{},[103,303],{"alt":304,"height":305,"src":306,"width":108},"Power (heating speed, in kW) and energy (total heat required, in kWh) are two different things",420,"\u002Fillustration-2-puissance-vs-energie-en.svg",[206,308,310],{"id":309},"a-pump-chosen-on-the-shop-window-figure-can-end-up-undersized","A pump chosen on the shop-window figure can end up undersized",[16,312,313],{},"Take a verified case, the Poolex Silverline On\u002FOff 7 kW:",[88,315,316,322],{},[91,317,318,321],{},[31,319,320],{},"advertised: 7 kW"," (Air 26 °C \u002F Water 26 °C \u002F 80 %);",[91,323,324,327,328,287],{},[31,325,326],{},"real at 15 °C: 4.7 kW",", i.e. ",[31,329,330],{},"−33 %",[16,332,333],{},"If you had picked that model counting on its 7 kW for spring use, you would discover:\nslower heating than expected, difficulty reaching the set temperature in the shoulder\nseason, and a compressor running longer to compensate.",[206,335,337],{"id":336},"the-role-of-your-usage-period","The role of your usage period",[16,339,340,341,344,345,348],{},"Here is the point that puts everything in order: your usage period is not a ",[19,342,343],{},"consequence"," of\nsizing, it is the ",[31,346,347],{},"parameter that decides"," which power figure to look at.",[88,350,351,357],{},[91,352,353,356],{},[31,354,355],{},"July–August only:"," the air is warm, so the 26 °C condition already represents your\nreality. The shop-window figure is relevant, and there is no undersizing problem.",[91,358,359,362],{},[31,360,361],{},"Extended April–October use:"," you have to reason on the power at 15 °C, otherwise the\nmachine struggles as soon as you step outside the height of summer.",[16,364,365,366,369],{},"In other words, it is not \"15 °C is always the right measure\". It is \"15 °C is the right\nmeasure ",[19,367,368],{},"if"," you want to extend the season\".",[54,371,373],{"id":372},"_5-ten-real-references-analysed","5. Ten real references analysed",[16,375,376],{},"Enough principles: here are the figures taken from actual spec sheets.",[206,378,380],{"id":379},"method","Method",[88,382,383,386,389,392,399],{},[91,384,385],{},"10 representative references, drawn from a wider survey of 23 models.",[91,387,388],{},"Three brands to illustrate the trend (Poolex, Astralpool, GRE) and two as\ncounter-examples (Zodiac, Hayward).",[91,390,391],{},"Two technologies (On\u002FOff and Full Inverter), sizes from 7 to 20 kW.",[91,393,394,395,398],{},"Comparison ",[31,396,397],{},"at identical conditions",": Air 26 °C \u002F Water 26 °C \u002F 80 % against Air 15 °C \u002F\nWater 26 °C \u002F 70 %.",[91,400,401,402,405],{},"The wording is deliberately neutral: ",[31,403,404],{},"\"gap between advertised power and power at 15 °C\"",",\nnot \"overstatement\".",[206,407,409],{"id":408},"the-10-references","The 10 references",[123,411,412,437],{},[126,413,414],{},[129,415,416,419,422,425,428,431,434],{},[132,417,418],{},"#",[132,420,421],{},"Brand",[132,423,424],{},"Model",[132,426,427],{},"Advertised power",[132,429,430],{},"Advertised condition",[132,432,433],{},"Power at 15 °C",[132,435,436],{},"Gap",[148,438,439,461,481,502,522,544,564,585,604,630],{},[129,440,441,444,447,450,453,456,459],{},[153,442,443],{},"1",[153,445,446],{},"Poolex",[153,448,449],{},"Silverline On\u002FOff 7 kW",[153,451,452],{},"7.0 kW",[153,454,455],{},"Air 26° \u002F Water 26° \u002F 80 %",[153,457,458],{},"4.7 kW",[153,460,330],{},[129,462,463,466,468,471,474,476,479],{},[153,464,465],{},"2",[153,467,446],{},[153,469,470],{},"Silverline On\u002FOff 15 kW",[153,472,473],{},"15.0 kW",[153,475,455],{},[153,477,478],{},"10.0 kW",[153,480,330],{},[129,482,483,486,488,491,494,496,499],{},[153,484,485],{},"3",[153,487,446],{},[153,489,490],{},"Silverline Fi 90 (Full Inverter)",[153,492,493],{},"9.2 kW",[153,495,455],{},[153,497,498],{},"6.4 kW",[153,500,501],{},"−30 %",[129,503,504,507,509,512,515,517,520],{},[153,505,506],{},"4",[153,508,446],{},[153,510,511],{},"Silverline Top 12 (Full Inverter)",[153,513,514],{},"12.6 kW",[153,516,455],{},[153,518,519],{},"8.9 kW",[153,521,501],{},[129,523,524,527,530,533,536,538,541],{},[153,525,526],{},"5",[153,528,529],{},"Astralpool",[153,531,532],{},"Eco Elyo-13 (Full Inverter)",[153,534,535],{},"13.0 kW",[153,537,455],{},[153,539,540],{},"9.0 kW",[153,542,543],{},"−31 %",[129,545,546,549,551,554,557,559,561],{},[153,547,548],{},"6",[153,550,529],{},[153,552,553],{},"Eco Elyo-20 (Full Inverter)",[153,555,556],{},"20.0 kW",[153,558,455],{},[153,560,473],{},[153,562,563],{},"−25 %",[129,565,566,569,572,575,577,579,582],{},[153,567,568],{},"7",[153,570,571],{},"GRE",[153,573,574],{},"HPGIC45 (Full Inverter)",[153,576,452],{},[153,578,455],{},[153,580,581],{},"5.5 kW",[153,583,584],{},"−21 %",[129,586,587,590,592,595,598,600,602],{},[153,588,589],{},"8",[153,591,571],{},[153,593,594],{},"HPGIC75 (Full Inverter)",[153,596,597],{},"12.0 kW",[153,599,455],{},[153,601,540],{},[153,603,563],{},[129,605,606,609,612,615,618,624,627],{},[153,607,608],{},"9",[153,610,611],{},"Zodiac",[153,613,614],{},"PX25 (Full Inverter)",[153,616,617],{},"5.5 → 24 kW",[153,619,620,623],{},[31,621,622],{},"Air 15°"," \u002F Water 26° \u002F 70 %",[153,625,626],{},"already at 15 °C",[153,628,629],{},"≈ 0 %",[129,631,632,635,638,641,644,649,651],{},[153,633,634],{},"10",[153,636,637],{},"Hayward",[153,639,640],{},"EnergyLine Pro ENP5",[153,642,643],{},"14.8 kW",[153,645,646,648],{},[31,647,622],{}," \u002F Water 24° *",[153,650,626],{},[153,652,629],{},[16,654,655,656,659],{},"* Hayward measures here at ",[31,657,658],{},"24 °C water"," (not 26 °C) — a slightly different condition,\nwhich we flag for the sake of rigour.",[16,661,662],{},[19,663,664],{},"Each row's number matches its source, listed in the \"Sources\" section at the end.",[206,666,668],{"id":667},"reading-the-results","Reading the results",[88,670,671,681,688],{},[91,672,673,674,677,678,287],{},"Across the 8 references advertised at 26 °C, the gap ranges from ",[31,675,676],{},"−21 % to −33 %",", with\nan ",[31,679,680],{},"average of about −29 %",[91,682,683,684,687],{},"Across all 23 models in the full survey: ",[31,685,686],{},"average −27.5 %",", median −26.6 %.",[91,689,690,693,694,697],{},[31,691,692],{},"A nuance by technology:"," On\u002FOff models appear to lose more (≈ −33 %) than Full Inverter\nones (≈ −26 %). Treat that carefully: the difference comes mostly from ",[19,695,696],{},"how"," each\ntechnology is specified on the sheet (a modulation range for Inverter, a fixed point for\nOn\u002FOff) rather than from any obvious physical superiority of one over the other.",[26,699,700],{},[16,701,702,705,706,287],{},[31,703,704],{},"Figure to remember (Calculhouse survey, 10 references, July 2026):"," between the power\nadvertised at 26 °C and the real power at 15 °C, the average measured gap is\n",[31,707,708],{},"about −29 %",[16,710,711],{},"The example to keep in mind:",[26,713,714],{},[16,715,716],{},"A heat pump advertised at 15 kW may supply only around 10 kW in conditions close to 15 °C.",[54,718,720],{"id":719},"_6-does-cop-follow-the-same-logic-yes","6. Does COP follow the same logic? (yes)",[16,722,723,724,727],{},"This does not only affect power. ",[31,725,726],{},"COP"," (coefficient of performance = energy delivered ÷\nenergy consumed) is the second \"too good\" number on sales pages. Like power, it is measured\nin favourable conditions:",[88,729,730,733],{},[91,731,732],{},"at 26 °C, spec sheets show spectacular COPs — up to 12 to 16 at peak on some Full\nInverter models;",[91,734,735,736,287],{},"at 15 °C, the same unit falls back to between ",[31,737,738],{},"4.4 and 8",[16,740,741,742,745,746,287],{},"A verified example, again on the Poolex Silverline On\u002FOff: COP quoted at ",[31,743,744],{},"6.15 at 26 °C",",\nbut ",[31,747,748],{},"4.4 to 4.6 at 15 °C",[26,750,751],{},[16,752,753],{},"When you read \"COP up to 16\", look for the condition. At 15 °C, a good COP is around 4\nto 6. That is already excellent — and it is the realistic figure to plan with.",[54,755,757],{"id":756},"_7-do-all-brands-inflate-their-advertised-power","7. Do all brands inflate their advertised power?",[16,759,760,761],{},"It would be unfair — and wrong — to conclude that \"every manufacturer inflates their\nfigures\". The dominant practice (Poolex, Astralpool, GRE and others) is indeed to advertise\npower at 26 °C. ",[31,762,763],{},"But it is not universal:",[88,765,766,771],{},[91,767,768,770],{},[31,769,611],{}," (PX25, Z250, Z300 ranges) publishes its power directly at Air 15 °C \u002F Water\n26 °C \u002F 70 %;",[91,772,773,775],{},[31,774,637],{}," (EnergyLine Pro) also publishes at Air 15 °C, with NF-414 certification.",[16,777,778,779,782],{},"What they have in common: these brands claim ",[31,780,781],{},"NF PAC \u002F NF-414 certification",", which\nrequires communicating on the standard 15 °C condition.",[16,784,785],{},"Which raises the question every reader now has:",[26,787,788],{},[16,789,790],{},"\"If 15 °C is more honest, why doesn't everyone publish it?\"",[16,792,793],{},"The answer is simple: because 26 °C gives a bigger number, therefore a more saleable one,\nand nothing legally obliges a manufacturer to publish the 15 °C figure — unless it\nvoluntarily commits to a certification scheme.",[16,795,796,797],{},"Hence ",[31,798,799],{},"the central lesson of this article:",[26,801,802],{},[16,803,804,805,808],{},"Two \"9 kW\" heat pumps are only comparable if they are quoted in the ",[31,806,807],{},"same condition",". A\n\"Poolex 9 kW\" (9 kW at 26 °C, so ≈ 6.4 kW at 15 °C) and a \"Zodiac 9 kW\" (9 kW at 15 °C)\nare simply not in the same class.",[810,811],"tool-cta",{"description":812,"label":813,"title":814,"to":815},"Our calculator works directly on the 15 °C figure — the one that actually matters for an extended season.","Size the heat pump for my pool","Want to know what this means for your pool?","\u002Fen\u002Fpool\u002Fheat-pump-power-calculator",[54,817,819],{"id":818},"_8-common-misconceptions-worth-correcting","8. Common misconceptions worth correcting",[16,821,822],{},"A quick memo to keep handy:",[88,824,825,831,837,843],{},[91,826,827,830],{},[31,828,829],{},"\"A 9 kW heat pump always produces 9 kW.\""," → No: power varies with the measurement\nconditions.",[91,832,833,836],{},[31,834,835],{},"\"The bigger the number, the better the pump.\""," → Not necessarily: a big figure at\n26 °C can hide modest power at 15 °C.",[91,838,839,842],{},[31,840,841],{},"\"Pool volume is enough to choose.\""," → No: region, target temperature, usage period,\ncover and exposure matter just as much.",[91,844,845,848,849,852],{},[31,846,847],{},"\"The advertised figure is a lie.\""," → No: it is accurate ",[19,850,851],{},"within its condition",". The\nreal problem is comparing different conditions without noticing.",[54,854,856],{"id":855},"_9-the-other-sizing-factors","9. The other sizing factors",[16,858,859],{},"So as not to reduce everything to power, bear in mind that the real requirement also depends\non:",[88,861,862,868,874,884],{},[91,863,864,867],{},[31,865,866],{},"Pool volume",": the bigger it is, the more total energy you have to supply.",[91,869,870,873],{},[31,871,872],{},"Local climate",": in the north the demand is higher; in the south conditions are more\nfavourable.",[91,875,876,879,880,883],{},[31,877,878],{},"Thermal cover",": a cover or roller shutter sharply reduces losses. ",[19,881,882],{},"A good cover can\nhave as much impact as a more powerful heat pump"," — it is often the most profitable\ninvestment.",[91,885,886,889],{},[31,887,888],{},"What you are aiming for",": holding 28 °C in high summer is nothing like extending the\nseason from April to October.",[16,891,892],{},[103,893],{"alt":894,"height":106,"src":895,"width":108},"An uncovered pool compared with one under a thermal cover: the cover sharply reduces heat loss","\u002Fillustration-4-effet-bache-en.svg",[54,897,899],{"id":898},"_10-how-to-read-a-heat-pump-spec-sheet-properly","10. How to read a heat pump spec sheet properly",[16,901,902],{},"The survival checklist:",[88,904,905,912,915,921],{},[91,906,907,908,911],{},"✅ the heating power ",[31,909,910],{},"with its condition"," (Air _° \u002F Water _° \u002F Humidity _%);",[91,913,914],{},"✅ the power at 15 °C, if your use is extended;",[91,916,917,918,221],{},"✅ the corresponding COP ",[31,919,920],{},"and its condition",[91,922,923],{},"✅ the operating range (minimum outside temperature).",[16,925,926],{},"Bad reading: \"9 kW heat pump\".\nGood reading: \"heat pump delivering 9 kW at Air 26 °C \u002F Water 26 °C, and 6.4 kW at Air\n15 °C \u002F Water 26 °C\".",[54,928,930],{"id":929},"_11-what-power-for-your-pool","11. What power for YOUR pool?",[16,932,933],{},"No magic formula, but these markers should stop you leaving empty-handed:",[88,935,936,943,949],{},[91,937,938,939,942],{},"for ",[31,940,941],{},"summer"," use, reason on the power at 26 °C;",[91,944,938,945,948],{},[31,946,947],{},"extended"," use, reason on the power at 15 °C;",[91,950,951],{},"a thermal cover changes the result substantially, in the right direction.",[26,953,954],{},[16,955,956],{},"A good choice starts with an estimate of the pool's real heating demand, then a check that\nthe pump actually supplies that power under realistic conditions.",[16,958,959,960,963],{},"That is exactly the logic of our ",[31,961,962],{},"pool heat pump power calculator",", built on the 15 °C\nreference rather than the shop-window figure:",[810,965],{"description":966,"label":813,"title":967,"to":815},"Our calculator is built on the 15 °C reference rather than the shop-window figure.","What size heat pump does your pool need?",[54,969,971],{"id":970},"_12-conclusion","12. Conclusion",[26,973,974],{},[16,975,976,977,980],{},"The right choice is not the heat pump showing the biggest kW number. It is the one that\nsupplies ",[31,978,979],{},"enough power in the conditions you will actually use it in"," — and to compare\ntwo models, always check they are talking about the same condition.",[54,982,984],{"id":983},"common-questions","Common questions",[986,987],"faq-section",{},[989,990,993,996],"content-section",{"icon":991,"title":992},"i-lucide-link","Sources",[16,994,995],{},"Each reference in the table (§5) links to the manufacturer's or a retailer's spec sheet\nshowing the measurement conditions. Data collected on 18\u002F07\u002F2026; sheets and published\nconditions may change.",[997,998,999,1011,1019,1028,1037,1046,1055,1064,1073,1082],"ol",{},[91,1000,1001,1004,1005],{},[31,1002,1003],{},"Poolex — Silverline On\u002FOff 7 kW"," — ",[1006,1007,1008],"a",{"href":1008,"rel":1009},"https:\u002F\u002Fwww.poolex.fr\u002Ffr\u002Fproduit\u002Fpompe-a-chaleur-piscine-poolex-silverline-on-off",[1010],"nofollow",[91,1012,1013,1004,1016],{},[31,1014,1015],{},"Poolex — Silverline On\u002FOff 15 kW",[1006,1017,1008],{"href":1008,"rel":1018},[1010],[91,1020,1021,1004,1024],{},[31,1022,1023],{},"Poolex — Silverline Fi 90 (Full Inverter)",[1006,1025,1026],{"href":1026,"rel":1027},"https:\u002F\u002Fwww.esc-grossiste.fr\u002Fboutique\u002Fpompe-a-chaleur-piscine\u002F46094-pompe-a-chaleur-piscine-silverline-fi-full-inverter-poolex.html",[1010],[91,1029,1030,1004,1033],{},[31,1031,1032],{},"Poolex — Silverline Top 12 (Full Inverter)",[1006,1034,1035],{"href":1035,"rel":1036},"https:\u002F\u002Fwww.poolex.fr\u002Ffr\u002Fproduit\u002Fpompe-a-chaleur-piscine-poolex-silverline-top",[1010],[91,1038,1039,1004,1042],{},[31,1040,1041],{},"Astralpool — Eco Elyo-13 (Full Inverter)",[1006,1043,1044],{"href":1044,"rel":1045},"https:\u002F\u002Fwww.quimipool.com\u002Fen\u002F13590-heat-pump-astralpool-eco-elyo-13-full-inverter.html",[1010],[91,1047,1048,1004,1051],{},[31,1049,1050],{},"Astralpool — Eco Elyo-20 (Full Inverter)",[1006,1052,1053],{"href":1053,"rel":1054},"https:\u002F\u002Fwww.quimipool.com\u002Fen\u002F13589-heat-pump-astralpool-eco-elyo-20-full-inverter.html",[1010],[91,1056,1057,1004,1060],{},[31,1058,1059],{},"GRE — HPGIC45 (Full Inverter)",[1006,1061,1062],{"href":1062,"rel":1063},"https:\u002F\u002Fwww.piscinehorssol.com\u002Fpompe-a-chaleur-full-inverter-pour-piscines-hors-sol-ou-enterrees-jusqua-45-m3",[1010],[91,1065,1066,1004,1069],{},[31,1067,1068],{},"GRE — HPGIC75 (Full Inverter)",[1006,1070,1071],{"href":1071,"rel":1072},"https:\u002F\u002Fwww.grepool.com\u002Ffr\u002Fpompes-a-chaleur\u002Fpompes-a-chaleur-inverter\u002Fhpgic75",[1010],[91,1074,1075,1004,1078],{},[31,1076,1077],{},"Zodiac — PX25 (Full Inverter, published at 15 °C, NF PAC)",[1006,1079,1080],{"href":1080,"rel":1081},"https:\u002F\u002Fwww.zodiac-poolcare.fr\u002Fchauffage\u002Fpompes-a-chaleur\u002Fgamme-bassins-residentiels\u002Fpx25",[1010],[91,1083,1084,1004,1087],{},[31,1085,1086],{},"Hayward — EnergyLine Pro ENP5 (published at 15 °C, NF-414)",[1006,1088,1089],{"href":1089,"rel":1090},"https:\u002F\u002Fwww.hayward.fr\u002Fcategories\u002Fpompes-a-chaleur-piscine",[1010],[1092,1093],"feedback-thumbs",{},{"title":1095,"searchDepth":1096,"depth":1096,"links":1097},"",2,[1098,1099,1100,1105,1110,1115,1116,1117,1118,1119,1120,1121,1122],{"id":56,"depth":1096,"text":57},{"id":78,"depth":1096,"text":79},{"id":203,"depth":1096,"text":204,"children":1101},[1102,1104],{"id":208,"depth":1103,"text":209},3,{"id":233,"depth":1103,"text":234},{"id":251,"depth":1096,"text":252,"children":1106},[1107,1108,1109],{"id":255,"depth":1103,"text":256},{"id":309,"depth":1103,"text":310},{"id":336,"depth":1103,"text":337},{"id":372,"depth":1096,"text":373,"children":1111},[1112,1113,1114],{"id":379,"depth":1103,"text":380},{"id":408,"depth":1103,"text":409},{"id":667,"depth":1103,"text":668},{"id":719,"depth":1096,"text":720},{"id":756,"depth":1096,"text":757},{"id":818,"depth":1096,"text":819},{"id":855,"depth":1096,"text":856},{"id":898,"depth":1096,"text":899},{"id":929,"depth":1096,"text":930},{"id":970,"depth":1096,"text":971},{"id":983,"depth":1096,"text":984},"2026-08-14","2026-07-18","The kW printed on a pool heat pump is measured at 26 °C air. At 15 °C, real power drops by about 29 %. How to read a spec sheet properly.",false,"md",[1129,1132,1135,1138,1141,1144],{"q":1130,"a":1131},"Does a 9 kW heat pump always deliver 9 kW?","No. That 9 kW figure belongs to one specific test condition, usually 26 °C air and 26 °C water. When the air is cooler the real output falls: at 15 °C a pump advertised as \"9 kW\" at 26 °C often delivers only about 6.4 kW.",{"q":1133,"a":1134},"Should I look at the power at 26 °C or at 15 °C?","It depends on how you use the pool. For swimming limited to July and August, the 26 °C figure is representative. For an extended April-to-October season in France, look at the 15 °C figure, because that is what reflects shoulder-season conditions.",{"q":1136,"a":1137},"How big is the gap between advertised power and real power at 15 °C?","In our survey of 10 references (July 2026) the average gap is about −29 % for models advertised at 26 °C, ranging from −21 % to −33 %. Some certified brands, such as Zodiac and Hayward, publish their power at 15 °C instead, so for those the gap is effectively nil.",{"q":1139,"a":1140},"What is a good COP for a pool heat pump?","COP — the ratio of heat delivered to electricity consumed — also depends on conditions. The headline \"up to 12–16\" figures are measured at 26 °C. At 15 °C a good COP sits around 4 to 6, which is already excellent and is the realistic number to plan with.",{"q":1142,"a":1143},"Do all brands inflate their advertised power?","No. The advertised figure is accurate within its own test condition. Most brands quote at 26 °C, the most flattering one, but some (Zodiac, Hayward) quote at 15 °C under the French NF PAC \u002F NF-414 certification. The real problem is not dishonesty, it is comparing two figures measured under different conditions.",{"q":1145,"a":1146},"What size heat pump does my pool need?","It depends on pool volume, target temperature, region, how long a season you want and whether the pool is covered. A reliable estimate starts from the pool's actual heat demand, then checks that the pump delivers that power under realistic conditions; a professional's confirmation is still recommended before buying.","\u002Fog\u002Fog-pool-heat-pump-power-en.png",{},true,"article","\u002Fen\u002Fpool\u002Freal-vs-advertised-heat-pump-power",{"title":6,"description":1125},"France","en\u002Fpool\u002Freal-vs-advertised-heat-pump-power","pool-heat-pump-power","lfWrM__XQIj0eAF_7qTPHZk9ZrsPCWLcf5aAUAIXKIo",{"en":1158,"fr":1161},{"category":1159,"slug":1160},"pool","real-vs-advertised-heat-pump-power",{"category":1162,"slug":1163},"piscine","puissance-pompe-chaleur-piscine",1788608751022]