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While it's great that you're addressing this subject, unfortunately you didn't really address it. Your summary is applicable in Privett Drive, with open gardens and low fences, but it's not so good in Coranation Street, with tiny back yards surrounded by high walls. Cold air tends to sink - on a calm day, the back yard will potentially fill up with frigid air. Here's my problem - our tiny back yard is packed with edibles, including miniature apple trees, a grape vine, soft fruit and Mediterranean herbs. I expect a heat pump may kill them all.

So how's such a system really going to work successfully in a 3 story, 6 bedroom solid stone victorian house with large single glazed sash windows in each room and x26 double radiators, currently powered by a 85kw oil fired boiler? Would have to be a pretty big heat pump to cope with the required heat output and therefore I suspect m unbelieveably expensive to have installed and then run.

Can someone ask the neighbours…….

Purchased 2 humidifiers & their unique (hot water feed) washing machine and all working well 2yrs later. So, now have the confidence to purchase their heat pump in 2025. I’ll let you know how it goes. 🤔

Thanks for this Tom, what average temperature is your house each day? I have our gas boiler thermostat set at 14°C and we turn it up to 16°C if it gets really cold 😅 My wife would have it at 20!! But that's too hot for me. We're buying our first house soon and I'm very keen to get a HP installed 👍

Tom, Thanks for the ‘reasons to be cheerful’. Positive stories show that it is possible to make changes. Also, it’s good to see an acceleration in the rate of change. We should not be complacent, but despite the efforts of the oil and gas industry, it looks like the power generation and transport sectors are well on the way to making the necessary transition to a fossil-free future. The lack of a good news story from the farming and land use sector is less encouraging. The introduction of Bovaer cow feed is a small glimmer of hope, but media reporting has encouraged resistance to change at a time when exponential change is required. food.blog.gov.uk/2024/12/05/bovaer-cow-feed-additive-explained/

Lots of buzz words that you have learnt of by heart really well so well done. Every and all the people from the people who have one installed to people who install them disagree with you so I'll go with that for now. Does amaze me the information left out of these videos made about this revolutionary bit of kit but i dont blame people who have laid down thousands on it to embellish on the fact to make themselves feel better about being hood winked into buying this. Shame it didn't work but worth a try.. In no way would this be good enough for my large family and we would not be willing to suffer for a made up climate crisis

The time to invest hugely in carbon capture was when it was being spoken about 19-15 years ago. The govt. Don't want to fund research. Now it's too late. The £21.7b would be far more effective if it was used to fund ICE vehicle scrappage and heat pumps.

This year I got rid of my remaining old petrol car and we replaced it with an EV, we now have 2 electric cars. I also installed a heat pump and removed the old gas boiler and we've just had PV installed on the roof with battery storage as well, I've also got solar thermal which I've had for 5 years now. So yeah we have made a lot of progress this year.

In my nearly 17 years experience as a domestic energy assessor the majority of heat pumps are replacing oil fired boilers not gas. The price comparison to run heat pumps is a lot closer against oil. And replacing oil boilers is a lot higher than gas. I think this is a big driving force in the up tick of installations.

12 years ago I built a new home on the site of my old one. (90 years old and difficult to insulate, and in need of all sorts of repair) We went no Gas, so ASHP install within the ventilation system , all white goods were AAA rating. PV panels on the roof. LED low voltage lighting plus battery backups. Over the top insulation in the walls, floor and roof. 11 year ago I went EV, now we run three, the house has three generations living in it. Last year we pensioned off the petrol mower, and went electric. With careful use of timeclocks nearly all of our power is 'Green' from Ecotricity on a low overnight tarriff. We live in Southern Hampshire. Like Wayne I also am on the list for a Ripple buy in.

I would love to have a heat pump, but I just can't justify it with those savings. Surely, with the addition of solar and a battery, that's where you would really start saving £££.

I'm 60 now and this has been a long journey , 9 years of having PV , 8 years of EV ownership ( to use the surplus PV) , 4 years with no gas so full electric home , 2 years of being a 2 EV house , no petrol lawnmower (Makita Battery one) , 2025 hopefully getting my first Ripple energy, more PV , hopefully V2G from our EV and a heatpump. Our 1951 built home is so much more efficient than when we bought it in 1987.

Our electricity has hit 123g/kg this year Hopefully I get a heat pump in 2025 , looking forward to a more comfortable house, heated guilt free

The thing that would help us HP owners the most would be the government doing something about the spark gap, having something closer to parity on the cost of gas and electricity would really shake things up. It's still just not even on the agenda though.

Personally the very good news for me this year, was Lincolnshire council being persuaded by the central government that we have to accept the additional infrastructure to get the offshore wind farms connected to the grid. No more NIMBY attitude.

What sort of price would I be looking for the heat pump and all the radiators to be installed in a two bed terrace house?

3.2pence off every kWh. Gonna add up over the years. Still can't beat panels on the roof and a storage battery.

Looking at that, unless you have a lot of microbore in the property, the buffer tank is not required as the circulation pump in the HP should be more than capable for enough flow around the house. Would be worth an experiment to turn the buffer into a volumiser but it is labour from an engineer which is £.

Bet this is an advert for the manufacturer seems to be loads of these online all with same make

Does it heat the radiators aswell?

£225.00 for 90 minutes, is that plus vat ? Any way the guy has to be trained that costs money, his van has to be paid forms well as his fuel, insurance and traveling time. His tools and business insurance then holidays and pension, national insurance stamp incidentals in this case a small amount of glycol (that ain't cheap) so what you break it down it isn't very much and as I said to one customer who asked about price increase when hovering out their boiler I explained the cost of electricity has gone up 😉😂😂😂

Great to see the lower figures published, i find that mynpimp drops efficiency at the low temperatures inline with yours. But i do have solar and battery systems to help. Keep up the good work.

We just got back from doing the Norwegian Coastal Route from Bergen to Kirkenes. You see heat pumps on most houses from Bergen in the "south" (but about as far North as the UK gets) right up to Honningsvåg and the North Cape in the arctic. Everywhere we went into was warm and cosy. The idea that heat pumps can't cope with UK weather is laughable, when they are working so well in countries which are much, much colder. And it feels a bit frustrating that you have to keep producing videos to counteract all the misinformation that was pumped out about them. In general I was thoroughly impressed with what I saw of Norway's green transition; healthy amount of electric cars, electric buses, electric boat charging stations, even our ferry was a hybrid of LNG and batteries (capable of running for 4 hours on battery alone) plus it actually serves a function of bringing regular deliveries along the coast. It just highlighted how far behind the future the UK is.

There must be a COP break-even number, above that and the heat pump saves money, below and it costs. That depends a little on current rates. The COP depends on temperature, which you can represent with a degree day chart for a heating season. Then draw a line across the chart to show how much time you might be below or above the line. In my experience, less time than people think, but they remember those cold days more.

Excellent video again Tom also the heat pump is on all day and not ramping up and down like you’d do with a gas boiler so more comfort for the same costs. I’ve just put 300mm of sheep’s wool insulation in my loft and removed fibreglass and the difference is really good. It’s a lot quieter and the moisture content has reduced and my other half isn’t complaining about being cold, the vacuum glass gets fitted first week in January so hope it’s not so cold or wet then, I’ve done a heat loss calculation for my house and I think I’ll need some sort of wall insulation before a heat pump is installed it’s 1867 and would otherwise need 3 massive radiators in the lounge, but we’ll see after the new windows are fitted,

Thanks for providing these figures as real world numbers mean more than theoretical examples. It’s fine to quote a scop of 3.9 but that just means it’s pumping out 3.9x the heat output for the same input. But if your input is high and it’s then cycling it’s a bit meaningless. It also have a fact of type of use, for a permanently occupied house then a heat pump is going to have a massive advantage but a house where you are typically out all day then having a boiler off and only come on at full blast for an hour may actually use less than a heat pump on all day because it can’t raise the temperature that quickly. Undoubtedly the case for heat pumps is there and giving us numbers like this is great evidence against the doubters.

You still emit less CO2 burning gas in a power plant, transmitting it and then using the heat pump at 270% efficency than if you burned it in a 90% efficient boiler.

I've the same heatpump as you Tom in a detached 3 bed costs are great averaging 4.5 cop for heat/water over the last two months I've had it. What concerns me is the amount of electricity they consume when it gets really cold and wondering if everyone had one would the uk grid survive such punishment/demand, a video on that would be appreciated 👍

Cosy 6 cop stats - oct 3.94, Nov 3.4 and so far for December 3.56

I have an AroTherm 5kW in a 1930s semi in London, 4 people live in it and we only have (large) radiators. My installation managed a COP of 3.82 in the cold snap. For the whole of autumn it's been a COP 4.52. In my case, it's saved me money vs gas.

About time ! we are getting to the real truth. Just for info the Uk energy generation for the last week or so is over 80% of fossil fuel’s so it’s all immaterial as You didn’t save any co2 using a heat pump. Simple then everyone should just install a new combi boiler.

Would be interesting to compare against the costs of carbon offset schemes

Don’t forget to include the savings from no gas standing charge. And do you pay more for gas servicing

Thank you for your comparison videos It is so difficult to get unbiased real world data . Are you sure agile is the best in your situation ? Scary the last few days . Regards Jeff

Those are useful figures (and good news) but I think you're playing into the hands of the people who say "why should I get a heat pump when it'll never pay for itself" by concentrating on the the relatively small savings. The fact that it isn't any more expensive is important (and that it actually works!) but the really important part is the CO2 reduction. The problem there is that most people have no concept of what 360 Kg of CO2 means. Is that a big reduction or a small one? How does it compare to getting rid of an ICE car, not flying to a foreign holiday or giving up meat? A couple of simple charts could add a lot of impact.

Thanks Tom for being honest with your viewers. I've been looking and researching the viability of ATW heat pumps and loads of sites bang on about how much you will be saving with heat pumps. So many of these savings are normally the ones who have solar and batteries who are constantly monitoring their systems and get on the best energy company rate, use these lower rates at off peak times to boost the system or charge their batteries!! All brilliant, it's exactly what I'd be doing, but not everyone has the time or the inclination or the skills to change the heating curve or set up monitoring equipment to fine tune their heating systems to an inch of their lives!! Your Free to fit heat pump ( I had to put that in!😄) has proved that heat pumps work in a modernised Northern terraced house, it's not noisy at the moment, it performs well down to -5C. all good👍 The minimal savings that you are estimating you make throughout the year can be wiped out in a cold winter, so overall the heat pump running costs is comparable to a modern gas boiler. Though as you say in your videos, to you it's more about, what each unit is doing to the environment👍

Great to be able to work out your average kwh daily consumption from your on screen cards, I was worried a bit as some days ours was eating 29kwh a day when it was really cold but average is about the same as yours

Thanks for posting your figures. This is out first Autumn/Winter with our heat-pump (Aerotherme+ 5kW) and saw a COP of 4.2 in October, COP of 3.7 in November and COP of 3.6 so far in December. The 2 cold snaps - the cold week in November got down to -5.3, averaged -1.5 through the week and COP was 3.3, this week has also been cold averaging -1 so far and again COP of 3.3. The heat-pump defrost cycle looks to have a huge effect on efficiency - it's been very humid and below freezing (freezing fog) for a few days this week and efficiency on those days really dropped. Costs are much lower with our heat-pump than the 20 year old gas boiler it replaced, at best the gas boiler would have been 75% (COP 0.75) and we have a 15kWh household battery and as BEV we're able to charge up overnight on the low Octopus Go 8.5p/kWh tariff. We do the overnight hot water cycle during the low tariffs houses as well. On days above 3 degrees out heat-pump electrical demand is low enough that we can do a full day on the energy stored in the battery. During this cold snaps it only last through to the mid afternoon before we've had to draw from the grid and paying the higher 26p/kWh price. It's still too early to do exact comparisons on total costs vs Gas, but even before being able to leverage the low cost tariffs even the worst days of efficiency the costs would only have matched Gas boilers, but now with the low tariff it's far far cheaper. Yesterday Octopus also removed our redundant Gas meter so that's another £108/year saving.

Great video! I've been busy making a complimentary video about how much CO2 we saved in our first full year of having a heat pump. Not sure it will be as easy to follow as yours!

You also need to take into account the saving you’ve made on the gas standing charge. We too have a heatpump but we also have two Powerwalls, solar panels and an EV so we buy all our power at just 7p per kWh. as well as getting an FIT payment of around £400 a year.

Hi Tom, how would I go about calculating the efficiency please, we've had our heat pump since May, running weather comp etc. I've worked our flow temps down over time in experiment. Less than thirty degrees centigrade now. We live in a three bed bungalow with reasonable insulation (which we strive to improve). We are home all the time after retirement so the system is running 24/7. Also on agile too. ( Did have a bit of a panic when the agile price went to almost 99p per uni at peak 46p average gulp) We are a

Hi Tom being just down the road from you in Hartlepool my weather was pretty much like yours. My heat pump fitted by Octopus went live on the first of November and on most days it has used ten kilowatt hours more than i used before. I have kept a spreadsheet for the last three years so i have a lot of back data to look at. I am on the cozy tariff and the only time the heat pump turns off is at peak time so it runs all day and night boiling the water between 10 o clock and midnight. I can honestly say that it works the home is warmer than it ever was before and it is actually quieter - eerily so because i was so used to hearing the boiler doing its checks every hour and the radiators bubbling each time. The last remaining lie is that it costs a fortune to run of course but as i said before ten kWh at cozy rates is not a lot of money and even my wife is happy about the bills. She even looks at our usage each day now as it is like an addiction isn't it

Most gas boilers will only get around 80% efficiency, the 95% figures are for a properly installed and set up system, in most cases that would have involved replacing loads of radiators. Generally, condensing boilers were installed by just ripping out the old boiler and sticking in a condensing boiler, without the system changes necessary to get a higher efficiency.

Hi Tom. Quick question, when you are estimating your gas consumption to electric consumption are you allowing the difference in how they run? So your heat pump will be set to on 24 hours a day, obviously it’s not always on at this time depending on how it’s set up, weather comp, load comp, open loop etc, to how many people run a gas boiler, an hour or so in the morning and a few hours at night? Or is that estimated consumption with the boiler programmer constantly on 24 hours a day to keep the property let’s say at 21 degrees all the time like a heat pump? Thanks

So about ,£300 cheaper approx compared to a gas boiler per year? Heat pump costs £15k to install. Gas boiler approx 3k. To install . That will take you over 30 years. To equal the cost saving of the boiler installation. Also the costs and availability of a heating engineer will be higher on the heat pump which sits outside in all weather. I know ill never have a heat oump but thanks for posting this video

Do you have your heat pump within 1 metre of your neighbour?

Anyone watching this, please do NOT copy. Wear a bunny suit and the correct eye protection and mask.

One oldfashioned gas hearth for one large sitting room cranks out 12 kW. You would need a 4 kW heat pump to replace it, and that's for that one room only. Heating of a whole house, plus water heating for showering and the kitchen, requires a multitude; up to 35 kW for a large and poorly insulated structure (105 kW for a gas fired central heating boiler). And 35 kW is a serious three phase AC consumer, requiring wiring adaptation and additional metering and fixed tarifs. With electricity being the most expensive way of heating as it is. The math on this is far easier than people think.

JUST SAY NO to heat pumps.