I honestly would not wish to use this as a basis for making a decision on any new purchase in the future other than to indicate a list of installations with some level of satisfaction. Not as an indicator of "Best Heat Pump".
I too only voted LG.. as thats the only heat pump I've had. I'm moderately satisfied with it. It has not broken down and does the job! But would I say it's the "best" ... no. 
Dissatisfactions are mainly with the controls, integration with 3rd party apps/controls and with information such as SCOP, inputs, outputs etc.
However, we probably go in circles and may have to agree to disagree! 
I would encourage a further survey/poll in due course with much more detailed questions that allow variable answers (not simple yes/no) etc
 

@toodles that's my point. If you were dissatisfied with your heat pump, you wouldn’t have cast a vote for Daikin. That’s precisely why these results carry weight. People who vote are effectively giving a thumbs-up to the brand because they’re satisfied with its performance, reliability or support.

Heat pumps are still relatively new to many homeowners, and most people will only have experience with one or two models. That makes the act of voting even more significant – because it’s based on real, personal satisfaction. Your vote for Daikin reflects your positive experience with their heat pump, and the same goes for every other homeowner who participated.

The awards weren’t about comparing every model in existence but rather capturing the sentiment of those who live with these systems every day. Each vote tells a story of trust and satisfaction, which is exactly what this poll set out to measure.

@tim441 I appreciate your perspective, but I think it’s important to clarify (again) what this poll is – and isn’t. This wasn’t designed to be a deep-dive survey with detailed metrics on SCOP, app integration or control systems. This is not an exercise in market research. It was intentionally simple, asking homeowners to vote for the heat pump brand they trust and recommend based on their real-world experiences.

Your point about voting only for LG because that’s the system you own actually reinforces the validity of the results. If you’re moderately satisfied but still chose to vote for LG, it’s because your experience wasn’t bad enough to withhold support. Dissatisfied homeowners, on the other hand, wouldn’t vote for their system at all. I'm dissatisfied with my heat pump brand, and didn't vote for it. That’s why these votes represent a general endorsement of satisfaction across all participating brands.

As for your point about whether this determines the “best” heat pump; well, the awards don’t claim to provide a technical analysis or an exhaustive ranking of features or a breakdown of models and their related performance. They’re a reflection of homeowner sentiment, and for most people, trust and satisfaction are the ultimate indicators of what makes a brand “the best.” In this case, people still trust Mitsubishi, NIBE, Grant, Vaillant and Daikin over other brands, and I think that's a sentiment that's echoed across these forums. This is also reiterated by installers we speak to on a weekly basis.

@tim441 Quite So! Writing questionnaires is an art (and for one, Amazon haven’t cracked it yet!) The word is ‘BEST’ and I don’t think that this was the most apposite one. Had the question been: ‘Having used a heat pump, would you chose the same make (and possibly model) of heat pump again’, I feel this would more accurately portray the feelings of users. As you say tim441, a naff controller doesn’t mean the rest of the system is also naff. Might a system with a ‘better’ controller have other minus points instead? Regards, Toodles.

@editor I still say that the word ‘Best’ in your question was not the most apposite one! (see my response to tim441). ‘Best’ infers that the chosen make is superior to any other and I feel this would be difficult to know without having experience of them all. ‘Nuff said’ I feel. This is an ‘Adult Group’ and we can agree to differ!😉 Regards, Toodles.

I think we've identified (to death, I suspect) that the poll had its limitations. I also think we're in danger of missing that this was simply a straw poll (at least that's how I'm taking it) and dismissing it out of hand because it doesn't meet a relatively high bar of research standards.

For me, I wouldn't use this as a basis for purchasing decisions. I would, however, happily use this as a positive indication that people are interested in the outcome and that it's worth putting a more structured survey in place to gain more comprehensive insights. I shudder to think how much time could have been used putting together a comprehensive objective poll only for half a dozen people to end up replying and no-one - least of all @editor - has that time to waste. As a stake in the ground I think it has served its purpose, but probably best it wasn't done the same way next year.

Posted by: @editor

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I strongly disagree with the assertion that these results are “misleading.”

I didn't say that, but I did imply they could be. What I did was give a hypothetical example of how a poll could mislead, and then said "In that example, the poll results are not only wrong, they are downright misleading". In that example, not your poll, which might or might not be misleading. We simply don't know.

Posted by: @editor

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The idea that the results are “just numbers” without meaning is also flawed. These aren’t random numbers.

What I was getting at here in I hope not too technical language is that they are just numbers effectively hanging in the air, because they lack a denominator. They have no context, and that's what makes it impossible to draw conclusions from, apart from, very simply, xxx people voted for yyy brand. Denominators do matter, hugely. If I told you that hospital X had 20 deaths and hospital Y had 5 deaths you might think you would avoid hospital X - until you learnt that hospital X was a large hospital with 1000 beds and hospital Y was a cottage hospital with 20 beds. Raw counts very rarely mean much, you need rates, and to get rates you need denominators. And even when you have rates, it is still complicated. Age the age/sex mixes of the patients the same? Do the two hospitals have the same case mix? Was someone in one of the hospitals cooking the books (discharging the patients say to a care home just before they died so the deaths were off the books)? These things are never simple. At least in this example, the case definition is simple, it is a stiff. 

It is also important to recognise that the percentages you quote are NOT percentages of satisfied customers, they are the percentages from a pie chart that represents all votes cast, ie how big a slice of the votes cast cake each supplier has. Mitsubishi have a 10.36% sized slice of the votes cast cake, that's all. Given there were 'over 5,700 votes, then that suggests there were around 590 votes for Mitsubishi, and this is not a very large number in the overall scheme of things... Can you even be sure one or more manufacturers didn't cook the books by spoofing votes?

But I digress. I am not sure why you are being so defensive about this poll. I am certainly not trying to turn into an academic analysis, but I do feel duty bound to point out when conclusions are drawn which cannot be sustained by the data. I am quite happy to leave it that we agree amicably to disagree, so long as both sides of the argument are out on the table.

I see other have posted while I was putting my last post together. Not wishing to over-prolong this, I do however want to add three further comments and then I will shut up (unless outraged into speaking up again!): 

Posted by: @majordennisbloodnok

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a relatively high bar of research standards

Suggesting we need a denominator so we can gets rates really isn't a relatively high bar, it is a more of a basic bar. 

@toodles - you are right, it is stretch too far to get from 590 or so votes from an unknown sample from an unknown population to a certainly implied, almost explicitly said, 'best brand'. 

Moving on to the idea of extending the poll to a survey, I am going to say the obvious: it is not for the faint-hearted! Such things are probably best left to organisations like Which?, and even they have problems. Which? survey participants may not be - or should that be definitely are not - representative members of the general population, the plague of small numbers (not enough in the sample to be able to draw valid conclusions), the immense labour involved in putting a survey together let alone doing it and analysing the results etc etc etc   

I've yet to acquire an ASHP. If my chosen installer were to propose one of the 'lower tier' brands I would now know not to be surprised of their existence in the market, but I would likely ask a few more probing questions than I would if the installer were to propose a higher tier brand.  As has been said in this forum on several occasions, it is the system design that is more important than the ASHP itself.  I am of the opinion that proven reliability and the controller are the other key differentiators. I take this poll as something to potentially feed into my own in-depth research (with a low rating/priority), but nothing more.