To everyone commenting on the size of the radiators I would just like to point out that from June 15th 2022 new Part L building regulations will require all full central heating installation including gas boilers to be low temperature of maxium flow of 55C What it means in practice is that even on gas boilers you will have to install radiators of considreably larger sizes and in older properties it simply means radiators of similar size as in this video for rooms with comparable heatloss. See below "A revised version of Approved Document L (Part L) of the Building Regulations has been published which will take effect from June 15th 2022. With this revision there are a number of changes to guidance and requirements covering both the new build and retrofit markets. With regards to existing dwellings the main points are: Complete New System Installations require: An appropriate heat loss calculation for the dwelling A system sizing methodology that takes account of the properties of the dwelling, such as the Chartered Institute of Plumbing and Heating Engineering’s Plumbing Engineering Services Design Guide The system should be designed to operate at a 55°C heating flow temperature"

Here in the southern United States, we use forced air heat pumps very effectively. In the event of the extream cold, it is backed up by electric resistance heat. This back up heat is seldom needed but can also act as emergency heat if the compressor fails. With the very hot summers the ability to provide air conditioning makes this the most practical system for most southern states.

I am from Romania and I am a woman. Your video was helping me incredibly! So thank you In my country, heat pumps are at their beggining. But due to energy crisis, there is crazyness on the market. It is a jungle, actually. Huge lack of knowledge, few good specialists, and lot of abuses. Myself I started to learn a bit about heatpumps and installations after having a very painful experience with an insltaller claiming to be an expert. I found no other solution than to start learning myself, learning the heatpump installer manual like a bible and start testing really well the so call "experts" offering to reinstall correctly my pump. Was it enough? yes and no. But... your videos were solid milestones for me, on the road to learning from the best. Therefore I am sending you my entire gratitute. Love from Romania 💜🧡

Nice install. It's of the outmost importance to reduce the Average temprature of the water in the system. Every degree that the temprature is reduced is about 2,5% Efficiency. I have a Geothremal heat pump and my Maxium temprature is set at 28C. Noramlly the system runs at about 24-26C. Last year I had a COP of around 6.5, including warm water production. A lot of people on here are saying that the install is complicated and saying that doing the caluclations on the average heat loss per room is too much work when really they should be doing this work regardless of what system they're installing.

Looks like a very good installation. Well it wouldn’t surprise me if this installation cost £15,000-£20,000 probably slightly more. In my opinion I think this is way too much money for most families to go down this route.. personally before installing a air source heat pump I go down the route of installing insulation possibly new windows and also looking on how to improve the buildings fabric to decrease heat loss. From my experience as a heating engineer, heat pumps have a place but most the time badly installed and proper care and do diligence is not taken while surveying the job.. I personally would advise people to look into how to make the property more energy-efficient through wrapping it up then installing a heat pump on old properties. Now if you had a brand-new property that was 100% up to scratch building regs regarding insulation or possibly a passive house then a air source heat pump would be ideal specially if you have underfloor heating everywhere.. Personally I think spending £20,000 on improving windows, insulation etc is far more bang for your buck

Really informative great video. Very easy to see how they get a bad rep because of incorrect spec. The size of those radiators though wow!

My god. What on earth have your customers got to do for a living to afford this monstrosity of an install. Most of my customers are scraping together the money for a 2k combi swap. As always the standard of your work and knowledge is unquestionable, and I’m sure all of us heating engineers can appreciate seeing someone doing something perfectly to the book, but for millions of people in this country this technology is simply a financial non starter and will never be affordable or practical. As far as the changes to the building regs, I can tell you now that hardly anyone is gonna do it. Just like the ridiculous Erp sticker calculating fiasco, that’s largely now just ignored, or boiler plus which is often again just ignored for people on fixed incomes then every penny counts and new controls are often an expense they won’t go to. These giant 20k heat pump installs are just pie in the sky virtue signalling for the middle classes. I’m calling people this year, regular customers for a boiler service and being told by them they can’t afford it. Yet more regulations coming in to make installs even more expensive for people. I’ve got fifteen years in this industry left till I retire and I can’t wait.

Brilliant video 👌 I've almost completed the awakening course on Heat Geek and its unbelievable what you learn. It was watching Andrew Millward and yourself that made me go for it and I'm so glad I did. The bar is definitely being raised with knowledge and installs like this which is great for the industry. Keep up the good work 🙌

I've watched Rogers videos and to be honest nothing he said is false. Heat pumps can be made work in every house but they are not the best solution for every household. Maybe the running costs he talks about are more down to bad installs rather than the system itself Those two huge radiators look ridiculous.

Great video. We had a GSHP installed in our 1960's house about 15 years ago. We have over sized radiators but not as scientifically sized as your install. A lot of plumbing yes, it was 5K of work back then, about the same cost as the heat pump itself. We probably went about it the wrong way in that we improved house insulation after the install. We do supplement ours with a wood burner in the lounge in the winter, but otherwise very happy. I can't honestly say its any cheaper to run than other options (we have no mains gas in our village), but the complete lack of maintenance and not having to worry about oil top-ups is a real benefit.

The pipe work alone is insanely complex, bordering on artistry. There must be miles of copper in that building.

A follow up video in a years time would be interesting to see how the home owner rates the new system with the old one. I'll keep an eye out for it. Let's hope it airs regardless of the outcome!

Class installation,I'm a commercial engineer but find your channel very informative,keep up the great work,wish all engineers were so thorough.

Absolute pleasure working with you Simon. Your a great embassador for the industry!

Great video. The installation highlights the serious issues we face with old UK housing stock. Heat loss is the enemy in winter. In summer it’s going to be cooling. I think we have to seriously invest in super insulation before we install heat pumps. Most “ ordinary “ households won’t have the funds for these high end systems. I’ve invested in second hand woolly jumpers. Heat the person not the space perhaps?

Here in Arizona heat pumps are all we have; up until this year, I didn't realize there was such thing as a regular A/C system that can't also produce heat. Crazy world out there

I'll be honest watching this is like watching a master artist paint a masterpiece: everything is perfect! I wish I could count on every installer to know how little forgiveness there is on this style of installation!

Szymon, your videos are second to none. You always take time to break things down clearly, what your opinions are and most importantly why. I think your channel is really underrated, and you still manage to find time for a good sense of humour. Thanks.

When I saw those radiators, I instantly thought of the monolith in 2001: A Space Odyssey 😄

Excellent work, as always Szymon, but I think this video kind of makes Roger’s point. That install must’ve cost at least £20k, that prv pump alone was £700! And having to fit those massive radiators, including those TWO great ugly things in the lounge! Yes, you’ve shown that ASHP can work in old, solid walled houses, but the cost and impracticality/ugliness of the system will definitely put the large majority of home owners off, as would the running costs. It’s only the well off, virtue signaling “I’m doing my bit” crowd who would entertain that kind of thing.

The thought of replacing my furnace for $5000🍁 had me cringing already, but watching this gave me heart palpitations at what the cost would be for this system.

Great video as usual mate. Fantastic neat work. I’m not 100percent sold on these systems yet. The ashp unit is not a nice sight in the garden and those radiators are so big they stick out like a sore thumb. Iv got a 4yr old gas boiler with average sized rads in every room. Iv turned the temp on boiler down to 58 degrees and the house still warms up to a comfortable temperature.(insulation in my house isn’t great either) I think roger has valid arguments. Fan of you both 👍🏻

It's always about the installation so finding the right people is, as always, super important. I mean the equipment is important but without the right installers, it's never going to work right. It's always about hiring the right people. Hire the right people and they'll make sure you get the right equipment. FWIW we got a new heat pump last fall and it's been AMAZING. Rising power prices and our monthly bills have dropped significantly. Love it.

In Australia we just use air based split system heating. It's quick to install and seems a lot easier than the amount of pipe work done here. I have a bunch of Aircon units in my house in all the bedrooms 2.5kw and lounge rooms kitchen etc 7kw and they all function as heaters and air cons. If one breaks all the others keep working. This solution seems overengineered and probably prone to failure as well as probably many many times more expensive. On the other hand looks like nice work 😂

Great video !! Hope our insulation and Bond & Seal helped. Its our Primary Pro insulation which we have started to manufacture as ASHP Installers were using our Condensate Pro to protect their waste pipe from the HP to the drain. They asked us to make the same for the 28mm distribution pipework, so we just launched Primary Pro insulation. Making sure all the joints are sealed is an important part of the installation/efficiency. Our focus was to make the products UV & weatherproof out of the box, easy to fit in all weathers, look quality, and be simple to look after throughout the life of the HP /system. Videos like this are vital to get the message out that heat pumps work, and the common sense approach is needed to help end-customers understand what is needed. Heat loss calculations, survey. Good advice from the start. Quality specification/costing, so the end-customer understands. Installation with nothing missed or made cheap, that will affect the efficiency and life of the system . Commissioning to fine-tune every post . Hand over/customer understanding. Last but not least, annual services of the system to assure the very best efficiency. Keep up the good work and videos, and I hope more and more will do the same to show heat pumps will 100% play a part in fossil fuel reduction and quality energy efficiency.

The only downside to heat pumps is where I am theres a lot of stone walled buildings with awful insulation. The Emmitters need to be massive in them and it's just not practical. Thats no fault of the Heat Pump though

Thanks, excellent video, I am a Chemical engineer and well used to piping,pumping,controls,heat transfer etc, but this is a very complicated install, well done. However no way in my house, not enough room left, already loads of room taken up by solar controls and home battery, and the radiators are huge. New builds are going to have to plan for a plant room for all the energy saving equipment.

As i and my company already installed over 1500 running mashines over the course of the last 23 years i can say: They work, you just need to know what youre doing. But our system run at 35°C in and 28°C out temperatures so you need an under floor heating system or special radiatiors with fan support. with these radiators you dont need to plaster your living room wall with radiators. holy moly ... my customers would look at me and would ask if i have undiscovered psychological problems or something for even suggesting that.

The main thing that needs upgrading in this country, it would seem, is the knowledge of our plumbers.

Hey Man, very good informative video's. A lot can be learned from them! I am a technician my self in Belgium and i am amazed how different you guys do the piping!

I would suggest putting the volumiser just on the heating side rather than on the common side so the heat pump doesn't need to heat it up in dhw mode (probably a negligible waste of energy but still a waste), the heat pump should only defrost in heating mode anyway but if it was to do it in dhw mode there's plenty of energy without the extra volume, nice idea about the bypass for the coil if it was to vibrate.

Amazing professionality, i usually build and construct everything myself but this is beyond my skills.

Roger point is that running cost of heat pump is more than Gas Boiler which is true. Because most people run their Heat pump below COP(Coefficient of performance) of 3. COP of Heat Pump should be above 3 if they are going to replace gas boilers and reduce utility bills. Achieving COP greater than 3 is very difficult if you are using Radiator with heat pump. COP depends on Temperature difference between supply water temperature and the outside Temperature. Heat pump are effective when the supply water is around 35ºC -40 ºC range , even outside temperature falls below -15 ºC. At this temperature range COP will always stay above 3. The solution is to use underfloor heating even for first floor to get the best out of Heat Pumps. Under floor heating can provide effective heating even when supply water is around 30ºC provided it is designed by professional. Those massive radiators take space specially in a Music room and look ugly and will struggle to heat the place up when outside temperature falls below -10ºC.

If they had spent this money on as many solar panels as they could get on their roof, and 30kw/h of batteries, they would have a much better system. The insane amount of pipework and labour involved in this is just ridiculous.

Hi. Another great video and detailed explanation, I have a quick question, we came across each other before, my HP works brilliantly in wormer seasons, however in the winter it is in defrost mode quite often causing the radiators to cool quite quickly. Is there anything I can do? Rec pump is on all the time ( thermostat starts/stops it). Thanks in advance. Rafal

Love your channel, I tune in all the time, your passion and knowledge is second to none. Honestly you're a legend. However I'm a central heating repair specialist and the perfection required with heat pump systems worries me, also excites me too. It worries me because even with the correct doses of corrosion inhibitor, servicing and maintenance, these systems are going to sludge up but with far more dramatic results. For instance, I powerflush systems ALOT, like three flushes weekly minimum all year round. Small 6 to 8 rad systems running on 24kw combi boilers chucking out 80° flow temp, they still fail easily due to magnetite build up, valve failure, even with inhibitor in. Rads just stop working. With heat pumps I feel that the systems are so finely balanced and sized, that a few years in there's going to be a significant reduction in output and efficiency due to system corrosion, especially as large radiators are notorious for magnetite build up. These systems have big potential to fade away performance-wise and are owners really going to spend the extra money on a far tighter and more expensive maintenance schedule, maybe or maybe not? Keeping these systems in tip top shape is going to be significantly more costly than gas boiler systems overall which outweighs heat pump cost savings. I'm equally excited as this is going to create massive earning potential for my company, as installers tend to cut and run on this sort of thing, leaving problem solver engineers like me to make the repairs and perform regular maintenance. I don't mind picking up where installers left off, it's a very lucrative market fixing other plumbers problems! That boiler scrappage scheme and the scheme aimed at subsidising replacement boilers etc, many of those LTD companies chucked in replacement boilers willy nilly then folded once they'd exhausted the funding. Barely anyone those systems were flushed out and dosed correctly, just a mini primary water filter chucked on which five years down the line is about as useful as a chocolate teapot. This is definitely going to happen with the heat pump craze; bodgers are going to cash in. Anyway, think you're great and look forward to future videos 🙂

Have you got recordings of the external unit turning on and off? That’s when the aircon near my window makes the most annoying noises, not when in continuous operation. Also, have you got recordings of multiple units turning on and off after multiple years of operation?

there's no way this system will fit in my new build house not to mention 35% of my patio will be gone and then i would need to protect this pump from my son kicking a ball

im so confused. im used to refrigerant straight to fan coil units. ive never seen refrigerant to water to radiators. does the heat pump boil the water or is it just hot water???

I have a heat pump system I installed myself. I have multiple heat pumps and multiple registers, wall and ceiling mount. It heats and cools excellent. I can cool my house when it’s 100f outside for a dollar or two a day depending on how much we’re home

Really appreciate the time you've taken to put this together. I'm scraping together the pennies to take the heat geek courses - ACS resits this year/van power steering failing/children... Knowledge always pays in the end. Thanks again.

Looks like these people should have put some insulation in too and saved a bit on the fairly epic install. And 22mm copper to the kitchen taps? Doesn't that mean a long wait for some warm water to turn up? Interesting to see the UFH just being inlined with the rest. I was hoping to do that but not done the sums yet to check the flow rates. Nice explanation of what you've done here. Oh and I was just admiring that nice set of bends before you mentioned it. Always a sign of quality work :-)

I’ve an ASHP. Water heated to 35 deg into our underfloor heating. Hot water for DHW set at 45 cause that’s what we like shower at. Total electricity cost for year (space heating, water heating , light, appliances etc) €1500. Far cheaper than our old house with oil. Insulation is key. No point fitting these systems to old houses that aren’t sufficiently insulated

Having worked with heat pumps since 2005, here are some reasons they don't work; Insufficient radiator surface area. Since heat pumps cannot supply 80 degrees C like an oil or gas burner can, you need larger radiators. If you replace a burner of some sort and if the chimney runs through the house that heat is lost. Need to be accounted for. There is a lot of cheap junk on the market. Don't buy it. A heat pump is not a heat pump. Improper commissioning. Care must be taken to adjust flows and temperatures correctly.

Szymon its great to see your knowledge expanding since that 3/4 story house you did. Did you sort you MCS out in the end or is it through Heatgeeks? I've fitted quite a few heatpump now and even with gas boilers, everyday is learning and evolving to be a better engineer. We have a vast industry of 'engineers' that can't even pipe an s plan!

This reminds me why I don’t want one.

I love the 4 bends at the bottom connection, nice work. Here in the USA, they only do forced hot air with the ductless splits.

It's also an option to use fan coil units. They are smaller in size and supports lower flow temparature. There are ones designed for home usage. Ex. parapet fan coils Con: they make some noise Pro: they can heat and cool you home too (condensate piping must be installed if it's used in cooling mode)

10:00 You've got to be kidding me!! They're awful. To help us out with the debate can you give us some figures please? What was the total cost of the install? Edit: I saw 20k on another comment. What CoP are they achieving? Pre & post gas/elec kWh? Really need some real world numbers for this.

Great vid. I wish that you had said something about how this house, looks like a traditional Victorian, was insulated. I believe that this is where the system succeeds or fails.

I just got a job with my uncles company installing heat pumps and am wanting to learn as much as I can. Will definitely sub. Iv never used any copper pipe that wasn’t line set so that was definitely interesting to see

Great video, thanks. I have been reading up on those heat pumps that are split, seems to make the outdoor unit much smaller and smaller air-con type pipes into the house, seems like a nicer setup but a guess you need different skill for the aircon gas stuf which would complicate things? From what I have seen from Rogers videos he is mostly in agreement with you guys, just video spun a different way.

Very informative, feels like we’re going back in time having a room dominated by huge radiators…

What a great team you two make, quick / knowledgeable / craftsmanship at every turn.

Vattenfall claim to have produced a high temperature heat pump that could directly replace a modern gas boiler, I'm a tad skeptical as the amount of work the compressors would do to achieve 80degrees would decrease the efficiency, but I'll be taking a trip to the Netherlands later in the year to see it first hand. Here's hoping.

The best to use a heat pump with under or infloor heating. Underfloor heating typically uses water at 37/40 deg C . It takes more energy to raise water to 70C, or the new 55C, raiditor temp, than 37C, floor heating temp. Which means either a major renovation or new builds. Because of the cost it's probably better to finance it in the original mortgage, so new build.

Roger all the way. I feel sorry for the customers you’ve got to remember that’s there house not an industrial unit ugly radiators and ugly ashp. Once the demand for electricity goes up the so will the price with electric cars and so on. It’s easy to lower your bills just buy a jumper and turn your heating down a bit and save the planet and money. Not rocket science.

When doing larger pulls, get into good graces with your local handyman. Often they are totally okey with helping out with those annoying parts once in a while and often they also have good connections if you need some specialty work done as well :)

I have a question for the experts. My current 24kw combi boiler is set to 58 deg c. We are very satisfied with the room temperatures after an hour of the CH being turned on. Does this mean there is a good chance we can get away with just a ASHP and the rads and pipework are OK? Its currently 22mm pipework

I’ve been attracted to this idea but it is too complex, regardless of system design. Even OP had to correct himself with return this and that, valve this and that. I bet it does work well but it still has an immersion heater. And these guys are experts. I’m not going to be an early adopter. I’m leaning to the Roger view for the time being. ROI doesn’t seem to be reasonable.

Amazing video, it would be nice if you could give us a ballpark figure of how much this installation cost, materials and labour. No need to break it down but just so we can gauge how much it cost to install a ASHP. Really nice to see the Heat Geek Assure programe already up and live 👍🏼

Very interesting, another great video. I think where Roger is coming from is that he isn’t against HP’s but in reality there is too much work and cost involved in installation in existing properties unless there is a major renovation going on. The cost implications for ripping up floors, re-piping, finding the space for new emitters & cylinders where most had removed for combi’s. Without doubt they should be compulsory in new builds, the government would be better off offering insulation grants, ensuring that installers do correct heat calculations and perhaps offering the best boilers such as new Intergas with flue recovery etc.

Fab video - lovely job and certainly helped me understand the requirements of an ASHP install. That’s a big house with a 17kW unit which is possibly part of the reason for some of the excitement in comments. Love the digs at Roger - he talks a lot of nonsense in this space - I wish he’d stuck to the helpful How To stuff.

Wow! I'm impressed. I didn't know there was so much design involved in these systems. I have three air to air hear pumps at home and mainly bought them for cooling during the summer months but will give a good level of heating during the winter. For now I'm keeping the combi boiler as the main source of heat but with gas and electricity going up in price I'm really unsure which will be the most economic source of heat. One is 3.3kW in the lounge and the other two in my office and bedroom are 2.5kW. I guess I need to check consumption next winter and compare.

My house isn't small but I would need to buy next doors house to fit the plant and pipes for a system such as this. It all makes so much sense now 🤣🤣🤣

I run a hybrid heat pump and it’s awesome! I have gas as the backup heat when the temps get too low. Heat pumps don’t dry the air out which is nice.

I didn't even know heat pumps were used to heat water and thereby heat a home. In Canada, I have only ever seen them used to push warm or cold air either from wall mounted units or from a central air unit. Interesting to see how tech is used in different parts of the world.

Love seeing a quality install, however I still have my gripes there’s no way combi slingers will install them to this standard which is a shame!

Nice install.........BUT what was the total cost of the installation?

A 5 ton/17 kW system seems pretty large for the size of the home. We have a total of 8 tons (forced air system) for 4,600 square feet above grade and a 2,800 square foot basement. I'm in Maryland USA and we see yearly temperatures between -18C/0F and 38C/100F. Average around 60% humidity, but can get much higher in summer.

The problem is as you said, electrical system needs upgrading, pipework needs upgrading, new radiators, installers need to be very competent because if any small bit isn't done correctly it won't work, it's expensive, it needs monitoring regularly, a low paid worker in an ex council flat in liverpool just cant afford this.

I suspect that you are the best heating engineers. Most others would be a nightmare. Going from combi boilers to this is a giant step.

So they cost a fortune to install, generate relatively little heat, need highly skilled fitters (good luck in UK) and need more pipework than a power station. But, hey, they "work".

Great video, it comes down to radiator volume, insulation and simply pump/control dynamics for success. Suits UFH more.

I do wish you where up in Cheshire. Really do appreciate how methodical and tidy your work is as I’d sign you up in a shot to have reviewed our needs.

Nice installation Would people want so big radiators in their rooms?

Hey. I love your vids, but you didn't address the elephant in the room. How much did the customer pay for 28mm pipes and all of the oversized rads? To heat the same house, whats the cost for heatpump vs condensed boiler?

And now I understand why heat pumps cost more over the pond. When I think of a central heat pump, it's always air-to-air. Not air-to-water

Hi. Just wondering what is the power usage of a heat pump. Is a 10 kw unit using 10 kw per hour .Or is there a way to compare oil burner as an 1 gallon jet per hour. And as with oil were i can put it on for 2 hours or do you have to leave a heat pump on all the time and let the stats cut in and out

This seems absolutely insane. Why are homes simply not putting in air handlers - which would do heating AND cooling! - rather than these gigantic radiators? Absolutely insane.

This reminds me of living in a Steam Punk world, it's completely unfeasible for anyone on less than 3 digit salaries plus where would all the pipework,pumps,valves,air unit, storage tanks, thermostats and massive radiators go? I'm a Marine engineer and there's just no way I'm turning my house into a boiler room. Thanks but I'll stick to burning tyres on my coal fire!😁

Very professional job. Great that you are dispelling myths that heat pumps don’t work. Roger the bodger should watch this video and see that they do work !

I just find all the equipment associated with heat pumps so bulky, so many homes just don’t have the space sadly

I dread to think how much this install cost.

Nice job but.... Not many people would have the kind of money to install a system like that and you had the benefit of a cellar to get most of the installation in and there's a lot of pipework involved and a lot of houses don't have cellars... ! Also not many folk would want radiators the size of icebergs hanging off the walls in their homes and it's always difficult to explain to people why there radiators are only getting Luke warm when they are used to having them boiling hot almost.... ! I think the best route to take would be insulating the house by fitting new windows and doors and insulating under floors and roof space etc and if done correctly will be a good investment , I believe the heat pump market will be very small for a long long time due to lots off different reasons some of which I've stated above and the more easier and most economical way ahead will be the Hydrogen boiler which I believe will be the way ahead in the future but it to has its faults and gremlins that will need to be ironed out before it becomes the next go to product for heating our homes... Keep up the good work Simon and I'm looking forward to your next one 👍

Just out of curiosity can I ask total cost of materials without labour on that 1 install please ?

What type of refrigerant did you use? Thanks

As ever, an excellent video Szymon. Well explained, a great install, really professional. It's strange seeing a job I've seen in real life on KZfaq. Thanks for showing me around.

Great content , really enjoyed and showed how a correct design can work , but the cost must be a crazy amount . Insulating the floor , all the pipework , and other material . I’m for but believe cost will be to much .

If you run the closed loop at 48 degrees, how do you stop the system from turning to sludge due to bacterial growth?

There is a KZfaqr that built a solar array to power his mini-split. He set it up to use the panels in the winter as a hot box to help the heatpump heat more effectively.

Excellent install and attention to detail but isn’t the essence of the problem that yes you can heat your house electrically with a heat pump but even in the current climate electricity (per kw) is still 3x the cost of gas?

Hey Simon, as usual absolutely stunning install. The work is a true master piece and I know you installed this to someone spec. However shame about the design and products that have been used here , the radiators are truly and shockingly ugly I would sooner have a poster of the elephantman on the wall. Cost for this was probably £25k if this is what the government is encouraging people to have ? We urgently need a new government !!!(I know of an estate that had these fitted and thus far winter cost £1500.00 per quarter , they have to be left on 24/7 .... this size probably £2000.00 per quatre...) And finally I hope who the person who sold this to the customer advised them that , after the install there's no going back to there gas boiler...cuz that will be the next thing this incompetent government will make law...people you have been warned ⚠️ Don't be fooled.......a master piece of workmanship Simon as always 😉

Really interesting and great wall through. I don't have a clue about plumbing but I'm curious and this is so technical and scientific.

i dun live in a particularly cold region but from i hear heat pump work except when you need them i.e in low low temperatures! is this true?

Again from New Jersey, the systems your installing are spot on for the job at hand. The systems installed here at this this level of control in the past were mostly in commercial applications. The residential HVAC market was driven by " Originally" by the cost and availability of cheap energy. Watching you work makes me realize how far behind the curve our response to energy conservation is. The technology has always been there but it "WAS" a hard $sell with Track homes and cheap oil and gas. Like the quality installations and results.

Shall keep my tiny basic combi boiler thank you! Talk about complicated and expensive!

And the other bonus is that big box outside your back door and radiators floor to ceiling look really good 😳🤦

Really complete explanation..but...real numbers are always avoided so can I ask....Watts input to unit (fans compressor etc) equivilent electrical watts output to equal the output of the unit, that is output over input times 100 to give efficiency ans lets forget the 400% advetised figures

This is an excellent video and explains very well why people think heat pumps don't work