Incredible care and attention to detail on your installs, clearly very proud of your work

Another brilliant video, once my gas boiler dies I'll have to get you to come fit me an ASHP! My neighbour had one fitted by a cowboy and she has had no end of trouble really goes to show that the technology works, the key is a good tradesman. Keep up the good work.

Nice installation! Affordable and Quality!

It is a joy watching and learning from you.

lovely work on the job, was listening to Betatalk episode the other day in regards to the insulation and its nice to see it being put into practice! your episode on there was great too!

You're a great example to installers of... anything tbh! You have a focus and an enthusiasm that is inspiring, love your work. I'd like you to reinstall my heat pump, I bet you'd find some over engineering in the system.

I like the professional looking trunking and glands. Unusual for plumbers to reach such electrical professionalism.

Very well presented, knowledge is the key here. Getting to this level should be a basic thing for any heating engineer but like you mentioned need the resources to learn from..

awesome as always

Awesome video, as usual. Interesting to see a retrofit too. Keep up the good work 👌🏼

Excellent job, wish everyone was like you. thanks for sharing.

I applaud you for the highest knowledge. Blows my mind every component to know.

Incredible work..so neat and tidy. Class.

Great video!5 Thanks! I’ve learned a lot including how to understand without complicating things.

Very understandable and concise overview of the pipework - thanks!

Wow Simon so cool to see your work again, really showing its not that complicated to have a heat pump installed, simplify the system. I have myself audited many systems, that have been over engineered/pumped, removed those extra pumps them with good results.

Great video, good to hear about the R290 and air bricks in the protected zone. Great install.

You always make it look and sound so easy 😊 Keep it simple as you say 👍

As well as being being excellent content. The production quality is excellent 👌.

Great video! we moved into a property which already had an ASHP in place feeding ufh and rads. It also has a buffer tank and extra circulators and we are currently talking with our local installer to have them removed. Already I have disconnected all the actuators to remove room zoning on the ufh. No idea what the scop is as it’s a ten year old heat pump. Your channel has been great to try and understand the essentials of heating system design.

Excellent presentation. Probably the best on KZfaq for heat pumps. I hope a manufacturer gets you some sponsorship.

Great work as always keep it up

Great to see real world situations/examples .

Liked the idea of keeping it simple. Rads at UFH temperature. No zoning.

Great description of how to have a simple install. Getting rid of those pumps will increase the COP a good deal to begin with. And great to see a female plumber. When it comes to mass installs as it will soon having ladies to talk through the system with older folks will make them happier to have one.

That was an excellent explanation of the system swap👏👏

Another excellent video. We have basically the same system, installed in March of last year. In March this year we had the UFH pump and the upstairs radiator pump removed as they were no longer required. It’s great to see someone else working this out as well. Please keep up the great work.

Top notch mate 👏

Wish I'd known about you earlier!! I had a heat pump installed last year, and the amount of pumps baffles me. (got 3 external pumps, one for upstairs rads, one for downtairs UFH and one for the system, and a LLH) for an average size 3 bed semi. Keeping it simple is almost always the answer.

Fantastic video as always .

Excellent work! Here in Germany, unfortunately, many plumbers are afraid of installing the heat pump without a buffer. Absolute nonsense =) The heat pump can only work properly and efficiently if no buffer is installed and it works in the direct circuit. There is still a lot to learn here in Germany. Luckily I installed mine myself. Annual performance factor, measured externally with defrosts... 4.6 😊 (location bavaria)

As always just the best info, proper heating system design and insall, no plumbery BS, no designing based on installers own bias. Exemplary on YT.

Love your video buddy . Keep it up

Awesome job! That's how everybody should this little suckers.

Nice little job 😎

Awesome video....

This proves it is better to have a boiler, i would never recoup enough savings over 13 years to justify a heat pump.

Great video, communicates the important issues very clearly. Why only one anti freeze valve on the return? I have only previously seen one on the flow and another on the return, an explanation wou;d be greatly appreciated.

Syzmon that was absolutely excellent.👍 Can I just pick up on your design point of establish head loss of the index circuit and checking the pump curve to ensure it can overcome that. In this situation those calculations enabled you to make two pumps redundant and were able to use the units integral system pump. So, if the integral system pump had been too ‘small’ could you have fitted a larger one without encroaching on manufacturers warranty conditions? Thanks for sharing all this good stuff.😀👍

I need you to come to France and do my house. You rally are outstanding

Great video as always. Keep it simple stupid is my favorite saying

Recently helped a neighbour out with his heat pump hydronic design, because he couldn't find a plumber who knew how to size a heat pump and design the hydronic system. The lack of proper training is abysmal in the UK. You are the one exception, of course😂

These videos are more interesting than they have any right to be. Great advertisement for your skills.

TOP CONTENT

The best in the business! Do you use software to calculate your pressure loses?

Lovely video as usual! Question about UFH without zone valves or actuators..... did they rely on different spacings to acheive the different temp/ heat loss requirement in different rooms? Seems a high risk strategy to try and acheive that with one constant temp flow through the entire system....... Especially when those controls would be a tiny part of the budget. Keep up the great work, I love the more technical aspects of your videos!

Top Job. So what will the customer do to control the manifold surely all the rooms are on constantly?

Great video. I’m going to do the switch. Need a good installer

Hi Simon, now that the gov are increasing the grant to £7.5k I have decided that now is seems to be a good time to go ahead and have an air source heat pump system installed. I am with Octopus and they said that the expected cost to me should be below £3k including any rads, pipework etc (I upgraded my rad three years ago so am hoping my newer ones will be up to scratch. I also had a large unvented cylinder installed which is squeezed into my airing cupboard on the first floor. The boiler was replaced at the same time with a condensing Vailantboiler and it was repositioned to the garage). Octopus will be contacting me to arrange a survey to check out and go over what is needed. I have a small three bed detached house built in 1994 which I had cavity wall insultion pumped in two years ago and I have had a PV (4.8Kw) and battery (14.4kWh) system installed last year, so am hoping my running costs should be a lot lower. The problem I am anticipating is that my house when built was plumbed with microbore (8mm?) and so was wondering if you can comment on this and if it is still viable to have an air source system installed. Also would you be able to carry out my installation, either in conjunction with Octopus, or directly with me? I live in Old Coulsdon, in the southern part of the borough of Croydon. Looking forward to hearing from you. Thanks, Al

Great video as ever, says it all about heat pumps that parts are not available after 13 years.

"It uses un insulated blue mains water pipes, which is unusual" 🤣🤣🤣

Great video as always. What are your thoughts on MIXERGY tank with ASHP? via their HP Heat exchanger( House is 5.5kw heat loss 2 persons)

All your videos are great Do you employ any one ?

Just a note on needing a second pump. 100mm spacing UFH works more efficiently than 150-200mm for low flow temperatures, but it may need to be 'microbore', ie. 8.6mm bore to make the tight bends. Check carefully the pressure loss on the longest loop and you could find an additional pump is required. As long at it's placed after the T off to the UFH, it won't interfere with the modulation of the main circulating pump.

Your knowledge & workmanship on the hydronic circuit is truly exceptional - but who does the owner call when it goes wrong? Is it the wet side or the refrigeration circuit that has failed? - my AC biased engineering team would have no issue diagnosing or repairing the refrigeration side of things, but would struggle (or not be interested) in the wet side. Likely to be vice versa for a plumber/mechanical engineer. Most air to water or ground source heat pumps that come my way have not been correctly designed/installed/commissioned - giving the technology a bad reputation. Unfortunately, engineers such as yourself are the exception….not the rule. Please keep up the good work & educational videos.

Interesting to learn that the new heat pump can run the DHW to kill legionella but it is close to a COP of 1. Given that the immersion heater is 100% efficient and you will be without heating while the DHW is heating up to 60 deg C I can't see the advantage of getting the heat pump to run the legionella cycle.

Excellent video again. I'm a home owner building my own home. Struggling to get someone to do overall design so teaching myself. I have UFH upstairs and down at 100 c/c spacing. High insulation and air tightness. High thermal mass. I'm happy that I have built the basics correctly so will only need a small pump to heat a large house at very low flow temps. The bit I'm struggling with is how best to integrate about 7m of solar thermal panels I had built into a south facing roof. Any pointers?

An engineer that can and does calculations in the UK is a rare beast….

Fantastic install. Agree with the simplification, but doesn't this mean the max floor temp will be 40degC? Too hot for some floor coverings. Why no mixing valve on the UFH manifold to reduce the UFH temperature?

Excellent video! Out of interest, is there any reason why you decided not to fit a mag filter?

Great work. I've started to see a few ASHPs fitted on brackets bolted to the walls of properties rather than on concrete bases. What do you think of this? Its obviously quicker.

Would be interested in the installation of the heat pump located away from house wall. Down garden how far, how is pipework installed and insulated.?

Nice and clean install that one ! btw, in the UK we obviously focus on heating but for the few summer months what are the options for cooling, would that just be an air to air system and some other water heating method? Seems to me we need an all in one solution that can do both heating/cooling plus water.

Really nice install mate enjoyed the video! Couple of questions What did you seal the lagging with silicone? And do you have to have a second zone valve on the cylinder for safety shut of like unvented when using a gas boiler? Or is it because the temps do go that high. Cheers Ben

Awesome video. I thought the Vaillant heat pumps had a pressure relief valve already fitted on the pipework within the outdoor unit so no need for one inside the property. I know Mitsubishi with their R32s dont want an additional pressure relief valve inside due to R32 being flamable, thought R290 would be a bigger no no due to air break on tundish into property. Did the index circuit end up being on the radiators or one of the UFH loops and how would you roughly calculate if you didnt have access to loop lengths?

Love these videos, what fitting are you using to connect the antifreeze valve directly to the heat pump? Thanks

I'm in the Netherlands and i cannot find anyone as good as you or the heat geeks! Are there any recommendations or do you give an online service for what to buy and to install in my situation?

Love your videos mate, doing a arotherm at this week, got an air brick to the cavity, called vaillant they said it needs to move did they email you proof on the protective zone?

Thank you for the informative video, do need to change all the pipe work if I am having my oil boiler of 25 yrs plus changed to air source heat pump system 3.5 Kw?

previous Lasted just 13 years how much did it save in running costs ?

I keep being advised to fill the Heat Pump with anti freeze by the manufacturer including Vaillant with the addition cost of a heat exchanger unit so the whole system isn’t filled with anti freeze. I notice this isn’t something you ever do but I’m a little nervous about going against the manufacturers advice.

Great video. What is the black insulation you use outside ?

Hi Szymon. Fantastic work! Did Vaillant ever email you the confirmation around air bricks? I have a similar situation to overcome.

Does the system you just installed do domestic hot water? Looking for a system that does both and maybe a solar thermal unit on the roof.

With such a large outdoor area, I'm amazed the customer did not go for a Ground Source Heat Pump? It appears the perfect property for it! ALSO, did you design the system to have radiators and UFH on identical flow temperatures?!?

🤘😎🤘

My 10 year old 3 bed semi has 10mm plastic pipework feeding all radiators. The main flow and return is under the 1st floor with 10mm pipe work dropping down to the ground floor rads behind the dry lined walls. My question is will all this pipe work have to be replaced.

Love your videos someone who Is a master of there craft, would Love to learn all this, may i ask the costs of a typical heat pump install and running costs compared to gas boilers as I understand they use alot of electricity?

Excellent video - thanks. Are you aware of any good information on how to calculate if the circulation pump is adequate for the heating system? I would like a direct system and want to know if I need to upgrade pipework..

What do you use to connect onto the condense waste for the Arotherm???? Great video

Very interesting video, one thing that keeps me wondering is the Old evaporator had a very long pipe run to the house; advice by British Gas Daikin intaller says maximum 10m run to the hot water tank. can you please comment on allowed length of primary pipework bearing in mind if evaporator cannot be sited close to the house.

What was the total cost to replace it and how much kilowatts of electricity does it use per winters day

I am about to desing my system and I have a question. If you dont separate the heating from hot water you cant aply any ingredient to protect the underfloor heating pipe. Isnt that an issue ? I always thought that this cemical protection is esential.

Why no magnetic filter imstalled and dearator?

Great video. So does the new modern heatpump have a variable speed water circulators on them?

I work in social housing as an electrician. Where i work now they are still fitting baxi assure boilers, i guess hoping hydrogen will take over from gas (it wont). I think eventually they will be forced to start fitting heat pumps in bulk. But there are many horror stories from social housing tenants of poorly installed and inefficient heat pumps, having been fitted by contractors with no real understanding of them. I really hope there is good training for the people who will end up fitting heat pumps in social housing or tenants will be pushed further into fuel poverty by botched installs.

Just one question. If you dont put blending valves on the underfloor heating and the anti legionnaires cycle takes the water up to 75C, wont that be an issue going straight into the heating system?

What courses do you recommend for getting into air source heat pumps? I'm a gad engineer and trying to move with the times. Don't want to be left behind lol

Great video. Is it common practice to not have zone valves for underfloor and radiator when using heat pump?

The company I'm working for are putting me on a heat pump design and installation PLUS putting me through F Gas. I love how simple these systems are (Like the old fashion heating systems really) - The thing I'm worried about is the amount of prep work you need to do. Do you charge to do a detailed quote? The heat loss calc I need to really learn properly so that I don't screw up on the first hurdle. I've been in the GAS heating industry for 16 yrs now so have a good idea of installations etc... My question is... Does it get easier working all this out?

So heat pumps have a life span of 10 years max, no parts available after 10 ? How do you deal with the heat generated in that plant room ? I bet it gets very hot in there, i've just left one and it was no fun at all !! ps, great channel :)

Is this system available in the us?

I'm trying to go down the heat pump route, amazing that system only managed 13 years, makes you think how long current units will last, 25 years like people say? Ah well if I could be have an experienced installer to do my system here in Bristol it would settle my mind

Could you teach me please?where you are located?

Our home is detached, old and listed - so increasing insulation not really possible. Really good thermal mass, and large windows giving good gain from the sun :) I have made it pretty draft free. I hope to have a heat pump to replace our ageing gas boiler. I would use it to give a good background heat and boost with a woodburner when needed. I currently run our boiler at 30-40 degrees even when it is minus 5 or worse. Would an air source heat pump work for us? Radiators are all plumbed 15mm to each rad, 22 back to boiler, i was thinking to upgrade the last section to 28mm and also 28mm to a new cylinder with the shortest possible runs to the heat pump and cylinder, no zones - add more radiators where required, but honestly, i do not want a super hot house, prefer a low steady heat. I would prefer to do the work myself, but if could find a good installer, that would be fine too :)

Great video - thanks. As a designer I wanted to run underfloor and radiators on one pump, but my calculations have shown that I'd need higher temperature for radiators than floor (though both low - eg 40 C radiators, 28 C floor) so have ended up with motorised mixing valve & pump for underfloor, all under heat pump control. I'd rather be on one pump but worry that either the rads will be too cold to do much, or the underfloor will overheat. I do like the absence of manifold actuators and have gone for manual adjusters for user to tweak rooms as required. Will you do an update in winter so we can see how it works in practice?

Great job, just a couple of questions 1. Building regulations for 2 zones on property ove 150m2? I love your ideas of simplicity but would have been so easy to zone it? 2. I had the idea that the blending valve on underfloor protected pipe from excessive temperatures? That there is a maximum floor surface temperature and if HP can do 75Dc could this go to space heating or only DHW pasteurisation?

Does the new boiler have phone connectivity built in?

Superb ! this means all Vaillant's schems are wrong.... 😅

did think you needed actuaters on multy zones for heat loss on different rooms have different heat loss same has balancing rads