Thanks Adam, Simon and the rest of the Heat Geek Team, for bringing your hot water cylinder design to us and selecting our bespoke specification as the one which met all of the project’s requirements. So next time *you* encounter a project which may require a bespoke cylinder or buffer vessel, we'd always appreciate the opportunity to explore the options with you.

A shout out to Terry ,fantastic engineer who I have dealt with over the last 12 years .Knows his stuff and overall a great guy !

Mark installed my heat pump last October and he made a superb job and I am really impressed with the performance of the heat pump with a current COP of 4.2

As an owner of a heatpump on a flat roof, I can confirm, it fine these days. Can hear it in the utility underneath, but only when it's on the hot water cycle..

Great vid. I’m on the same path at the moment in my home although started with solar and battery and now have just bought an EV. Heat pump is on the list at some point, but my 4 year old boiler is still working fine and we don’t use a great deal of gas with it being a new house. Keep up the good work!

Hydrogen will definitely be a big thing in industry (like steelmaking), but yeah, it’s not going to be a thing in residential or commercial. Here in Australia the gas industry is still trying to push it as a last ditch effort to maintain some relevance and eek some money out of stranded assets, but it’s not going to happen. Those Vallient unit looks really nice. I have a 5kW Sanden for domestic hot water but I’d consider upgrading to one of those in a few years if I put in hydronic underfloor heating (pretty rare here) when I hopefully do an extension.

Loved to see this conversion, great job :) It is interesting to watch this from a German's perspective. My house is from 1968 and the population generally is of the opinion that houses (brick and mortar , roof insulated + big radiators and type 22 radiators) is generally not capable of using a heat pump. Nice to see that others are doing what my plumber says is impossible 👍

Class, well done all involved 👏👏

Mark is due to fit our heat pump next week! Very excited. Another Heat Geek assured installation. Hopefully it won't be as chaotic with as many engineers onsite. 😜

Glad you're being clear about hydrogen, couldn't agree more

Brilliant video mate

Nice to see Liam helping out..........Cant wait to see how you configure the system given you will have cheap electric time slots which may conflict with efficiency? please keep us updated👍

As per usual, brilliant video explaining all that can be done with a heat pump. Its a shame that the boiler manufacturers and the government are still hyping on about heating homes with hydrogen instead of sorting out the electrical grid for electric heating.

I enjoyed that one! I've got the car, panels and battery, Vaillant arotherm plus being installed next month - on a large Victorian detached in Scotland too, who would believe it!

Amazing videos gents! 🔥

So much good in the 1st 3 mins of this video... the 90% of homes point being SPOT ON!

I'm really interested to see how this plays out for you. We installed solar 2 years ago with batteries, then last year a mixergy tank and we haven't looked back. It took a fair bit of convincing the wife to do the above but it would be fair to say with the prices for energy as they are she's now on board. I want a heat pump but it seems to be a minefield of information. I've had two visits from approved installers with one saying yes and one saying don't bother. 🤷

I've just had a 9.5kw Fujitsu air to air system installed (replacing storage heaters in my bungalow) and I'm really surprised how quiet it is. DHW is supplied through a stiebel eltron dce-x 10/12 instant water heater to get rid of the old immersion heater. We're averaging less than 1kwh of electricity on hot water a day. Looking forward to seeing how the AC handles winter in heating mode.

Fair play for putting in big old school rads with large water volume and thermal mass. I would have cried if I saw Alu Rads. Great video

Great video Adam 👍🏼

Looking good mate a big hug from us all. Liked the fact we could see all the kids and Jo in the video. Men they are growing quickly ❤❤

8:00 Not enough cylinder talk IMO. More please 🤓

Amazing video, do you do your courses in person or only online as i struggle with online learning? Also what are the installation costs and running costs, compared to a gas boiler, thankyou

Twins! And you managed to grow your business as well as you have!? Legend Well done you & Jo!

question on the ASHP + water tank. did you install a buffer tank? if not why? thanks

Hi Adam, thanks for all the amazing content and everything you have contributed through the heatgeek organisation!... I am now thinking more towards ashp as part of an ongoing extension - however, the most suitable place looks like a flat roof directly above garage/plant room. The other option is a fairly narrow passageway which could be an issue with air flow. Would you recommend the roof option for a 10kw pump and have any further thoughts on the potential airflow issues in narrow passageways - your video on this seemed to suggest it may not be that much of an impact on performance? Thanks again 👍

Great video! Thanks for sharing! QUESTION: It seems like Vaillant is selling out of their aerotherm models is there any news of a new model being released soon? Also could you share a few more details about the cylinder… I live in Denmark and am planning on installing a Vaillant aerotherm 7kw and an very curious about the design of the cylinder and double coil

Will you be doing another video on the cylinder? I am curious about how you have piped the cylinder? Are the 2 coils coming off another 28mm or are you reducing off a larger curcuit?

Hi Adam. Happy new year and thanks for all the tips. One question I do have is do you have a spec for the rads you used as all the triple column ones I look at appear to be less output than the same size k2. If you have a link that would be great. And thanks again

I'd love to have that level of noise. My boiler is in the loft and is well loud in our bedroom in the winter.

What rads are these? Apologies if this has been answered already! Also, is high volume water content good or bad for efficiency when running a heat pump?

I know this isn't the main focus of you channel but since it's mentioned in this video; could you make an episode about photovoltaics and especially home batteries since there's already enough info on standalone PV but not as much about the sensibility of a home battery. Can a battery keep up with the demands of a massive consumer such as a heat pump? How much current does a heat pump draw initially and during steady operation? My heat pump claims to be capable of a "soft start" (addon feature) - would this make sense in conjunction with a home battery? 🔋 Many thanks for the videos!

Great video. If you're adding a super high CoP hot water system and plan a battery then why the Eddie heating the hot water directly with electricity? Surely you can charge the battery off the solar and then heat the hot water via the heat pump at >>100% efficiency.

Any chance of a link to the radiators you have gone with? they look great.

Awesome BBQ Adam! 👍

Love the hot water cylinder, sorry to everyone else. Are plans available? What is the coil area of your double coil, is it around 3m^2?

Nice video! Have you got a link to the new radiators you used? I thought those cast iron radiators didn't have a good heat output rating, if they do I'd get some too.

Very interested how you are getting on with the garage roof placement. Anything noteworthy in the last year of use?

Have you sold the hydrogen boiler, if not how much space does it take up?

@HeatGeek - you've said you're going to install an electric battery to store your excess energy from the solar panels - could you actually use your shiny new boiler as a "heat battery" by overheating the water using that excess electricity?

Great to see Tommy on your crack team! He installed our top notch 400%+ HP last year and did a superb job. Where you from? "Raaan cowna" 😂😂 12:25

Very good job wish I had this a few weeks ago could have saved me a drive😂

How well would a heating pump work in a single pipe heating system ?

Nice job! I counted 8 experts doing the installation. What were the costs of materials and labour? I am about to replace my entire system and would appreciate one of your experts quoting me for a heat pump. I’m in the Ipswich area.

I always wonder if it is possible to install the fan unit thing in the front of the house facing the road. The reason is that (in theory) that can absorb the heat released by the vehicles passing by. Don't know if that logic makes sense...or councils don't allow it etc.

What the name of the lift to get the HP up there?

The hot water cylinder looks well designed…..maybe you should partner with them to release it as a heat geek branded/certified cylinder?

This guy is the Colin Furze of heating 😉

Great video Adam and the team :) Whats is Marks A/S/L by the way?

Thoughts on the Vaillant Unitower, vs a cylinder on a new installation? Should the unitower make installs quicker/cheaper for the majority? Not much info online - outside of marketing? On a house with literally no existing heating - is there an advantage to one option or the other?

did you not require volumiser or a buffer at all to increase the system volume?

One of the things that concerns me, is the degree to which the hydrogen option is still being taken seriously. Last week I had some radiators swapped out (new, attractive, oversized ones put in) by a really nice, young engineer (28yrs old). He worked hard, fast and did a super tidy job. I opened the discussion by asking if he was trained or going to train in heat pumps, and he said “there’s a lot of focus in the industry on hydrogen so going to see where things go over the next 5 years”. This is the problem. This wasn’t some old engineer who can hardly use a smart phone and doesn’t want to learn new things and have to do heat calculations, this was a guy the same age as my son who is listening to and being influenced by his peers, and in this case probably his own Dad who IS almost retired and in the same industry.

What kind of radiator is that 600mm one? It look like cast iron ones we had in soviet days here in Ukraine.

Are the radiators normal cast iron radiators? Could you please share the manufacture of the radiators so that we can compare the specs with standard radiators? Would this heat pump system work with UFH on the ground floor and cast iron radiators on the upper floors?

Hi, super channel! I'm comparing your performance and that of Jones online on Heatpumpmonitor. I notice that yours cycles quite a lot whereas the other one doesn't. Could this one be a bit too powerful and forcing it to stop because it's at its minimum?

First time I’ve come across a fuel cell CHP boiler but I was puzzled when you referred to it as a hydrogen boiler - it’s a bit of a misnomer really that was maybe to give brownie points to hydrogen even though it still uses gas albeit more efficiently- well done for admitting it is a waste of time even at great expense - the public should not be duped by lobbying from those with vested interests in hydrogen clinging on to the hope that gas can be replaced by something similar…

Mark with the "ASL?" LOL.

With my 350m3 of heated space (130sq meters) I use between 5-7m3 of gas daily. (hot water included) Heating 24/7 at 22° The Thermostat is on a heating curve of 0.7 and the water inside the radiators is from 36-40 Outside temperature between -2C° to+5° The Vaillant boiler is oversized (24kw I think) so it doesn't modulate low enough. Would go for a heat pump but just to lower emissions.

I have a couple of flat aress I could mount one on though inevitably any flat roof does need replacement at some point so thibk thats what would out me off rather than the noise.

How come a Valiant heat pump and not a Viessmann ?

Are big cast iron rads better for a heat pump? They are very pretty and cost a lot so I’d rather not have to change them.

I just wish we could do this within some reasonable upfront cost. The need in our home to replace underfloor and boiler makes it way too expensive

What refrigerant this heatpump use ?

What about going with something like ThermaSkirt and save so much space on the radiators?

Great video is the system all open circuit with sensocomfort controls also is there a volumiser or do the radiators have enough volume

They are digging up the road outside my house to prepare the pipes to deliver hydrogen to my house right now 👀

How about plate heat exchangers for hot water?

Does it matter if a heat pump is in the sun vs shade

Great video but when are you going to do a video like this on a house that has a combi boiler and radiators feed via micro bore pipe

This is from a heat source calculator for a house of my age , For every sq ft of living space, you need about 30 BTU of heating output. That means, for example, that for a 1,000 sq ft home, you would require a 30,000 BTU heat pump (that’s a 2.5-ton heat pump)., so my heat source pump for my house is 60000 but with a weight of 5 tonnes, so how is that going over my roof then

Brand of radiators?

has anyone thought of using evacuated solar thermal tubes with a heat pump, because you can get -30 outlet from the heat pump and even on a pretty cloudy day you can get +20C outlet from evacuated solar thermal, obviously that isn't going to work during the night so you would still want a air heat exchanger, but your efficiency during the day time even on the cloudiest of day would be pretty amazing and with propylene glycol you can go down to -50C before it would freeze, so yeh for the night you would have to heat the propylene glycol so that it stays above -40C, but that shouldn't be a terrible amount of energy given specific heat of propylene glycol and that you would only be heating it by a maximum of 10C which would be roughly equivalent to heating water by 5C. And during the summer you can use the solar thermal directly to make your hot water, say for example when the secondary tank reaches 50C which with an added 700W emersion heater on that secondary tank on a sunny spring or autumn day the solar thermal on it's own should bring you to 30 - 40C in the secondary tank easily, you would want to have the solar thermal coming near the middle of the tank and going down to the bottom and the emersion heating above the solar thermal so you are making sure the immersion heater isn't heating the water that is going out to the solar thermal though. You would also want a small tank between the heat pump outlet and the solar thermal inlet to mix the outlet temperature PG with ambient temperature PG because otherwise you run the significant risk of thermal shock to the solar thermal which will shatter the tubes, in actuality toy might want to route everything into and out of the tank to not damage the heat pump either because on a sunny but cold day the outlet temperature of the solar thermal could be 100C or so. I suppose 2 loops with a heat exchanger on each side inside a tank of PG would be best.

Could we please have the statistic source that over 90% of homes have double glazing and 200mm loft insulation? Many thanks for your videos

How easy is it to move the Heat-pump when you need to re-cover the flat roof?

if i said to the wife ‘i can reduce the flow temperature’ she would be beating me with that radiator and also be reducing our nocturnal interactions to a very low rate 😂

Can you explain/ expand on them rads being more efficient at a lower temp as rated at dt 30 they would give off 700w (1200x600) where as a stnd k2 (1200x600) would give off around 1000w ? I’m guessing your meaning the increased water content?

10:10 Did you mean 6000 kWh? I.e. 6 Megawatt hours. Over what period? Or did you mean 6kW of electrical power?

7.00mins. 3 heat meters?.... the street inlet temperature measurement is calculated sum of total energy injection to 3*C water to heat the house? (The true total input efficiency)

I do believe you on this subject but proof in heating your normal house In cost from aug to march comparison is needed for all elec and gas before and after you have a couple months to tweak your system Not sure if you intend to have your viesman running in parallel or not This is fine by me but lets have results done in the right way You need to monitor all systems and show us none heating engineers approved Question hot water tank cold inlet cold direct in bottom Or in bottom with cold mixing in middle with tube up to middle of tank On a normal tank feed eco cylinder indirect not fancy gledhill Waiting for your results as i have a viesmann boiler

How many plumbers does it take to install a heat pump. Lots apparently.

A passivhaus approach will save you a lot of money. At least the 15k on the hydrogen boiler. and that air pump looks expensive and massive.

I thought pressure test was for 2 hours at system pressure + 30% ?

ASHP has left me in debt to ovo. and a wrecked house. Wait until winter comes, then you will hear it.

If the hydrogen idea is dead why are they pushing to test hydrogen in Ellesmere port?

Really seven days though! 😏 my problem is new build well 10 years old now, with 10 mm plastic microbore pipe work most runs though are 3- 4 meters. Already got solar and two Powerwalls but not sure which way to go as definitely can’t rip up chipboard flooring, oh and typical of new build it’s a dropping system.

I thought those cast iron radiators are 10x the price and lower surface area for the same space taken up vs modern rads? Not to mention more environmental impact from manufacture.

Would you recommend moving into this kind of work going forward rather than gas engineering

Hi Adam. Was it the Robert Llewelyn David Cebon podcast that convinced you Hydrogen wouldnt work? It certainly was me

Viessmann md will be having a stroke. He loved them vitovalors

ASHP is only just about viable in an extremely well insulated house with little or no door/window opening in winter. In any other situation the house will in no way feel warm enough, the heat needs to be on 24/7 as the warmup time is incredibly long (hours) at 45C-55c flow temps. The cost of electricity no matter the so called efficiency will be extremely high and not feasible for the average working people. To be most efficient the flow temps need to be 40C and no more, once you go above that the efficiency literally drops like a stone. Average electricity bill for a semi detached 3 bed home would be about £400 per quarter ON TOP of all other electrical usage. It cannot heat hot water to safe temps regarding legionella etc and requires a BOOST to 65+ degrees, this adds more to the cost of electricity. I did my apprenticeship from 1984-1988 before heat pumps were around and have watched the progression since. I would NOT have a heat pump in my house. Also the total reliance on electricity for EVERYTHING is going to come back and bite people REAL hard at some point. I have written an ASHP calculator that does heat loss calculations for you, allows you to input a flow temp, it will then tell you the rads required, size and output in KW, you can then enter the price per KWh of your electricity supply and give you the running costs per day/week/month/year. With the current price of electricity nearly all installations are unviable from an economic point of view unless you are very wealthy and or have a significant solar installation and don't care and have your big wood burner ready to go, which they all do by the way. I would debate anybody on this subject of the reality versus the hype. from a 40 year heating engineer.

I... have never even heard of freakin' hydrogen boilers!!! What madness is this???

17:20 🦗s

8 plumbers heat pump technicians come to your house for a day good luck with that....😅

too many chefs comes to mind

Roger Bisby would be turning in his grave if he saw you slating hydrogen.

How about linking that with a soild fuel back boiler for example? I believe grant are working on such a unit i strongly believe you should allways have more than one heat source in a house

What was the cost 20k? If so lot of people can't afford that unless the government helps.

BBC R4 today interviewed Karl Arntzen, CEO Worcester Bosch discussed the roll out of ASHPs. Just one ninth of target. He blamed the "spark gap" the 3 to 1 difference between the cost of electricity compared to gas. Even with a COP of 3 at best energy bills will be more or less the same. So why would anyone choose to fit an expensive heat pump with no proof of long term savings?

COP?

Next video replacing the Gas Cooktop ?