Design Heating System Pipework Like a Pro

Рет қаралды 18,879

2 ай бұрын

#heating #systemdesign #heatpumps
In this video, I show you how to design a heating system pipework like a true pro. We discuss the following topics:
- heat loss calculations
- how to read pump graphs
- how to calculate pressure loss
- how to size pipework
- what software and apps I use to design my heating system
The concepts discussed in this video are based on a real-life air source heat pump retrofit installation that Urban Plumbers completed in Hook. On this installation, we have done the following:
- replaced a 37kW system boiler with a 7kW Vaillant Arotherm Plus Heat Pump
- replaced 300l horizontal cylinder with a bespoke 225l cylinder from Newark with a 4m2 coil
- upgraded all primary pipework sized for a low temperature and low velocity set up
You can see the performance of this system on the Open Energy Monitor website here:
emoncms.org/app/view?name=MyH...
The link to the design files is here:
'coming very very soon - promise'
Link to my website:
www.urbanplumbers.co.uk/

Пікірлер: 147

@TheoneandonlyRAH 2 ай бұрын

i really respect how transparent and generous you're being. you're not afraid of people stealing work from you. which you shouldn't be! your videos like this make it clear that you're excellent - you should raise your prices! but such generous videos will also raise the standard of installs across the country, which is what we really need.

@CommercialGasEngineerVideos Ай бұрын

You made a good point there. Its good to have the right motives for the industry as it has long lasting impacts. You can grab your money and run with only that in mind or you can aim to change the game. Sure the money will follow

@ThePastaPastor 2 ай бұрын

If these concepts aren't included in the official qualifications you have to start to wonder what the value of the qualifications are and the purpose of the accreditation bodies are. Great video

@westleyleake699 2 ай бұрын

These fundamentals were pretty much all included in nvq L3 when I did it in the 90's. The problem is that it got forgotten as nobody used it daily when fitting high temp boilers after college.

@BerkeleyTowers 2 ай бұрын

Excellent work! De-mystifying this is crucial for the future!

@UrbanPlumbers 2 ай бұрын

Thank you 🙏

@bramptonkendell 2 ай бұрын

I criticized you for "lets guess the heat loss" on a previous youtube, you have redeemed yourself for explaining how critical an accurate heat loss calculation is for sizing heat emitters, sizing connecting pipework, selecting the correct water pump and ultimately the correct heat source (heat pump). Time well spent to get it right, and actually with the apps now available, not very difficult to do. Well done. The quality of your work is always evident.

@ecclesheat 2 ай бұрын

Cool man. I'm a Kiwi Plumber in Germany getting my Plumbing Qualifications recognised. I had a bit of experience in Maintenance Plumbing in High-rise buildings in NZ. So I was shoved into the Heating group of tradesman. It's been two years of a reasonably steep learning curve.... All of what you said is pretty standard here and now a requirement for any new installation. But sadly they still want thermostat valves on every room to get government funding and bloody buffers. Cool to see it all put together like that in a video. From Thursday I have my Digital Heating Craftsman exam. That's 3 days planning a house with heating and Plumbing, heat loss etc Then a quoting it..... Anyway thanks for sharing, real awesome to see someone proud of what they do and work at the standard of the professionals we all should be. Cheers

@deshte Ай бұрын

If you want in the bathroom 24 degrees and in the bedroom 20 degrees, how you regulate the sistem without the actuator?

@UrbanPlumbers Ай бұрын

@deshte go and see a doctor if you need 24c

@deshte Ай бұрын

@@UrbanPlumbers that was not the question, let’s stay with the subject here , can you or not regulate different temperatures in different rooms without a actuator?

@ecclesheat Ай бұрын

@@deshte by calculating the actual heat needed for that room. To maintain that temp. Then adjust the heating surfaces to provide that amount of energy at the lowest flow temp you can. (Tighter laying of underfloor, more flow through the underfloor, or bigger radiator) Its true you lose immediate adjustment. But save a tone of energy. 20% mixing loss I a buffer on its own. Then electrical energy for extra pumps etc.

@deshte Ай бұрын

@@ecclesheat so for a new house , on top of the slab you can put 10 cm of XPS as isolation , in the room where you want more heat after calculation you can put the underfloor heating with the space between runs at 10 cm using 17mm pipe and you will increase the flow . Of course no buffer for heating. What about using a buffer or something else for hot water? This is in a plain language. Thanks

@jchidley 2 ай бұрын

Fantastic video. I'm designing my own system and had already come to the conclusion that pipework design was critical to achieve the desired COP. Your expert opinion validates my research.

@paullongley1221 2 ай бұрын

Very great video as always, interesting bit on qualification side, I’ve seen ‘dumbing down’ of qualifications and abilities all my life from vehicle, caravan, and building trades. Even in the last few years the competency levels for basic electrical work ,in the leisure sector, have fallen from a four day intensive course to a couple of hours online. It’s really bad that for the few people like yourself who demonstrate their better ability, you don’t get recognition that’s deserved, with the exception of satisfied customers of course. Unfortunately much of our industries are biased towards cheap, quick , and get out. Thanks for what you do 😊😊

@brianwood5220 2 ай бұрын

Great job UP. Your the best at what you do. You've single headedly raised the bar. Thanks for sharing.

@taraumat 2 ай бұрын

I wish I could find someone as knowledgeable as you here in the Netherlands

@chrisparkin8329 2 ай бұрын

Excellent Sir your best video so far, thank you for breaking it down so simply to understand- you’re a top man!

@stixstonesinvestors5413 2 ай бұрын

Notification urban plumber has uploaded, me here we go again, rubbing my hands together and wow what a brilliant video. I was thinking the other day heat geek should do a module where we have to do this from start to finish, i think that would be brilliant. You upload something similar. As always Simone you truly are an unbelievable engineer and im hooked. Thanks bud for sharing 🙏

@UrbanPlumbers 2 ай бұрын

Thanks for watching !

@stephenpearce3880 2 ай бұрын

Really Great.... Heating Engineers are so different to General Plumbers (Night & Day)

@ATECHinstalls 2 ай бұрын

Well explained professional. Hopefully one day we get to when all contractors will do proper calculations on every job they do.

@baobab17 2 ай бұрын

Excellent, as usual. Thanks.

@apexjunky 2 ай бұрын

I love your videos! Currently arriving close to the right end of a long deep retrofit project of a 100m2 property with just underfloor heating.I've done a heat loss calculations of the fabric of the building myself to be 2kw (not including air change,but there will be mvhr).Any designs I get for the heatpump system all include buffer tanks and zoning.When you explain it should be so much simpler with an open system!

@meineszmf 2 ай бұрын

another excellent video, keep up the good work, learning more and more. waiting for the design fils to do some calculations for myself.

@hiltonshaw5528 2 ай бұрын

Another cracking video mate, keep up the good work

@UrbanPlumbers 2 ай бұрын

thanks Hilton! See you at installer?

@hiltonshaw5528 Ай бұрын

@@UrbanPlumbers yes Definitely mate 👍🏻

@dorsetengineering 2 ай бұрын

Nice to see more MLCP going in, it’s great stuff… The Henco -to-copper adapters seem the nicest to use from those that are on the market. Universal jaw compatibility too (U, TH)

@UrbanPlumbers 2 ай бұрын

yes, mlcp has it's place, especially pre insulated stuff. It is just so hard to get fittings from stock anywhere.

@johntisbury 2 ай бұрын

Great video Szymon as you say the top 1% of installers all do this. Hopefully that percentage will continue to expand until it's the norm rather than the exception. Thankfully the resources and training is available to those who wish to learn.

@TheZippyMark 20 күн бұрын

I'd agree with him and his working practices being in the top 1%, not criticising his work at all, but I'd guess a job like this must also be only affordable for the top 1% too. I think the real issue is that most people simply couldn't afford this installation, and that's where standards lessen, to match the market. At a guess, I'd think this installation must have been something around the £15,000-£20,000 mark?

@johntisbury 20 күн бұрын

@@TheZippyMark agree 100%. It’s still early adopter territory for many. Mass market will soon bring volume will bring down pricing.

@TheZippyMark 20 күн бұрын

@@johntisbury that too, in that early adopters are also enthusiastic to learn and willing to tolerate any teething issues along the way. I do think there will be big issues when heat pumps are being fitted in places that didn't really want them, I.e. council houses etc, because I guarantee people will insist on only running it for an hour a day no matter how much you tell them that's not the most efficient way.

@bernardcharlesworth9860 2 ай бұрын

Thanks,Very informative

@bornnieqc9117 Ай бұрын

Would love to see the calculations once you get around to sharing them. Great video as always!

@erinthecat4206 2 ай бұрын

When you see the difference between industry mass installation figures, and those from the more educated plumbers who are taking the time and doing the training, you can see why these videos, from yourself and HeatGeek and similar, are so very important. I do believe this level of training should be the normal. If they can't do it, then they shouldn't be installing it. Been off the tools for some years now, but I now look at who is trained this way and who isn't, and suggest folks do likewise.

@UrbanPlumbers 2 ай бұрын

I agree - this should all be basic knowledge. Industry has been dumbed down for years. Pluming is a skilled job in both manual and theoretical sense. We need to change the perception of heating installers as just pipe fitters.

@petarpetrov4562 2 ай бұрын

You are a truly inspiration for every one in our industry.I am a heating engineer, but not to this level yet and people like you are the reason to make me want to become a real pro.I just finished the heat geek course last week , but I am still reviewing the information until it sinks properly because all of it is new to me.Do you mind sharing what is the app that you are using for heat loss and also if you can recommend what is the best source book for U values that I can get ? I want to start practicing doing heat loss calculations on some family friends to prepare myself. Many thanks and keep up the good work !

@xmoss18 2 ай бұрын

Heat Engineer

@jimmy9985 2 ай бұрын

Good work

@UrbanPlumbers 2 ай бұрын

Thanks

@IanBarnwell-rm7ft Ай бұрын

I am learning a lot from your videos and it is proving very helpful when getting quotes in for replacing my gas combo-boiler with a heat pump. One thing that was recently mentioned, that I haven't seen before, was having a monobloc heat pump running a water /anti-freeze mixture in a loop to a heat exchanger rather than circuit going directly to the heating or hot water coil. I was told this was due to living in Northumberland it was to prevent freezing. I have not seen this on any videos before and don't know if it is needed or how it may affect the heat pump efficiency. I would welcome your views. Thanks

@UrbanPlumbers Ай бұрын

Not needed and will affect efficiency negatively. Use AFV instead.

@mihaiachim5299 2 ай бұрын

Nice video

@mahmoodhassan261 2 ай бұрын

Thanks dude

@TheHeatingPeople 2 ай бұрын

Glad you explained bespoke on this one…… and got it right! 😂😂😂

@UrbanPlumbers 2 ай бұрын

I did it for my biggest fan - Adam

@TheHeatingPeople 2 ай бұрын

He’s definitely big.

@UrbanPlumbers 2 ай бұрын

Yeah a can’t miss him

@mihaiachim5299 2 ай бұрын

@ 10:00 I love MLCP pipe - It is not perfect but is my favorite pipe 😊

@adydanner Ай бұрын

Hi just wondered whether you are still releasing the design files for the installtion? Really interested in the detail for this installation to help improve my knowledge. Thanks for all sharing your knowledge great videos.

@MrStraightdart 2 ай бұрын

Thanks for another brilliant video can you tell me which high flow diverters you use please ? Keep it up the good work !

@pmb9172 2 ай бұрын

Thanks for this it helps further my ability to consider what my installer should or should not be doing . When you do heat loss calc what assumptions do you make about insulation , is it referenced to the minimum requirements at the time of construction plus what the home owner advises as upgrade etc ?

@turtlehomes411 2 ай бұрын

Szymon, would you be able to a quick tutorial on how you setup your pipework in the brackets with the insulation in position and also how you then insulate the pipes afterwards?

@jimmy9985 Ай бұрын

Have a look at primary pro website, it’s all on there, very easy to

@ezaaaz 2 ай бұрын

Very nice job, and detailed explanation! How can you measure/estimate the length of the existing underfloor heating pipework if you have no plans for that? It seems also crucial to define the correct pump.

@adamdaly7503 2 ай бұрын

You really are amazing, any chance you’d like to visit Ireland and sort out my heat pumps😊

@danmfeist 2 ай бұрын

Great video. The bit you don't discus is how you run radiators and UFH on same heat curve and how you balance this.

@UrbanPlumbers 2 ай бұрын

I will do a video on it in the winter

@bob-mu7wk 27 күн бұрын

Amazing video as always, I learn something new every single time I watch one of your productions! Do you find that the internal bore of the flexi hoses varies from brand to brand? I have found some have extremely poor internal size despite appearing to be the correct product externally. Is there a brand you normally use? Thank you

@MaxMakerChannel 2 ай бұрын

Can you reccomend some books for hydraulics? Preeferably online?

@44cai Ай бұрын

Great Video! When will you be putting a link to your workings up?

@davidoleary1922 2 ай бұрын

brillant video as always

@johnc4323 Ай бұрын

Out of curiosity, do you calculate pressure loss of individual fittings or add a % ontop of pipework resistance? Amazing video as always, doing tge industry proud 👏

@Umski Ай бұрын

37kW - FFS - I reckon no more than 10kW heat loss at -2C for a modernish house? Too quick off the mark -7kW Vaillant - that should be good up to 9kW when needed 😊

@adamsweet3587 2 ай бұрын

I'm doing the Heat Geek course to ensure that when my ASHP gets installed in my new build, it will be spec'ed correctly. Also, when I did my Engineering Degree 30+ years ago the SI units was Kn/m2 not Pascals. not quite easily to convert when 1bar = 101.4 Kpa. We only used Pascals for air pressure in ventilation. It's getting a feel of using large numerical values. Like having the feel and understanding of MPH speed and having to deal with KPH.

@UrbanPlumbers 2 ай бұрын

You are not the first customer to do HG course just to make sure the installation is correct. It's a bit of an overkill, but sadly this is the reality we face at the moment.

@Aphova 2 ай бұрын

@@UrbanPlumbers true. A big local installer with years of experience and amazing reviews happily quoted me £20k for a 9kW system in my home that I'm now pretty sure is safely under 4.5kW max. If it weren't for Heat Geek and videos like yours I probably wouldn't have known better.

@barneyc4919 2 ай бұрын

1 bar = 100 kpa 1 kn/m2 = 1 kpa, sorry

@affieuk 2 ай бұрын

@@UrbanPlumbers Is there any chance there will be a course that will cater for home owners, specifically so that they have the knowledge needed to make sure there installation is correct?

@HeatGeek 2 ай бұрын

Note we have a home owner course specifically for this.. no need to do the engineers course!

@mrjozza5924 Ай бұрын

Excellent work! Could you please describe if laminar vs turbulent flow makes any difference? I heard that if flow is less than 1.2L/min in the UFH loop, there is no more turbulence inside the pipe.

@deanchapple1 2 ай бұрын

Another great video and a bit of an eye opener regarding pipe sizing. Thank you for taking the time to do it. Also, X2 anti freeze valves? So is that official now? Vaillant wants two AF.

@UrbanPlumbers 2 ай бұрын

Yeah, been told off for using one

@deanchapple1 2 ай бұрын

@@UrbanPlumbers does it affect the warranty on the ones where you have only fitted one AFV?

@normanboyes4983 2 ай бұрын

@@UrbanPlumbersCan you honestly imagine Vaillant honouring warranty for a frozen evaporator even with two anti freeze valves fitted?🤷‍♂️

@enm22 2 ай бұрын

As an AV installer I was pleasantly surprised to see audio and network structured cabling, too few builders are bothered to do this 😔

@UrbanPlumbers 2 ай бұрын

That was the customer who did this not the builders

@RicknessJ82 2 ай бұрын

Amazing video. Curious why the air conditioner and heat pump are different units? Wasn't this a good opportunity to consolidate them?

@normanboyes4983 2 ай бұрын

Syzmon another excellent video in all respects and pitched perfectly for either those in the industry or interested consumers. I note this system featured in the video is not on the heat pump monitoring site yet - does that take a while to feed through?

@UrbanPlumbers 2 ай бұрын

It should be, unless I forgot to register it

@normanboyes4983 2 ай бұрын

@@UrbanPlumbers the snapshot shows as per your link, but the other site is not showing in table format with other installations (There are four of your installations showing in the table).

@UrbanPlumbers 2 ай бұрын

@normanboyes4983 change 30 days to all on OEM. New installs are not visible as they are under 30 days old

@normanboyes4983 2 ай бұрын

@@UrbanPlumbers Got it thanks.👍

@raiphkay6829 Ай бұрын

Heat loss calculations - one by myself, one by Octopus and next week one by 'Heat Geeks'. We have a MVHR system - it reduces the ventialtion heat loss by about 70%. Should be interseting to see if they take the MVHR into account - Octopus didn't.

@jrisner6535 2 ай бұрын

When are you posting the calcs?

@alanc1406 2 ай бұрын

Will the airconditioning system be conflicting with the heat pump in the background and will this affect scop performance of your installation. Great 👍 video

@sarunasdubinskas1660 2 ай бұрын

I believe it should not, as air con will be used in summer to cool - so output gonna be heat on outside & it should come up, and heat pump only heat hot water time to time - so it will affect air con a bit negatively.

@juniorplumber1275 Ай бұрын

Good luck

@mikeheap8823 22 күн бұрын

Encouraged by your excellent video, I have started to calculate the pressure loss in my index circuit. The method to calculate this for pipework is well documented, but I cannot find any figures for the actual heat pump (12kW Gen 6 Samsung) or the 600 x 1400 K3 radiator. Where do you go to get these sort of values to get the total pressure loss? Thanks.

@markhodge1755 Күн бұрын

Great video, nicely explained, what make 3 port diverter did you use?

@UrbanPlumbers 18 сағат бұрын

Mut Meccanica

@thelikesofus324 2 ай бұрын

Great video, very informative. If your calculations show a need for 28mm pipe - say between the heat source and the cylinder, and the fittings on the boiler are 22mm, what do you do ?

@UrbanPlumbers 2 ай бұрын

Short distance of smaller diameter doesn’t matter. If you need 28mm then you use 28mm no matter what connections you have on a boiler or heat pump. Having said that to use 28mm on a boiler you need around 40kW heat loss. I have seen a lot of the biggest houses in my area - not a single one was even close to 40kW heat loss. Doesn’t stop people installing 40kW in flats.

@thelikesofus324 2 ай бұрын

@@UrbanPlumbers thanks for your prompt reply.

@foppo101 2 ай бұрын

Who trained this chap he is miles ahead of anybody we have in the UK.Which country is he from?

@JohnMullee Ай бұрын

french. autodidact smartypants

@khatijamatwadia5392 Ай бұрын

Sir your videos are excellent. I'm looking to change my career to plumber and heating engineer but cannot afford to fund my course. Could you please sign post me how to go about starting a self learning journey in terms of learning resources. Thanks. Mo

@TheYohtube Ай бұрын

In cold weather the ASHP may freeze if its working hard. Wigh no buffer where does it draw heat from when it reverses if there is no extra volume in the form of a low loss header or buffer? Having said that that im not sure if you design a buffer vessrl under the hot water storage as per old school???

@pip1980 2 ай бұрын

Thanks for your videos. I have a 7kW Vaillant aerotherm with a 40l buffer in our small bungalow. SCOP is below 3 (3.5 for this May). I assume that the ASHP is oversized. HOwever I also notice that the delta T (as shown on the control unit) is only usually around 1°C. As I understand, the water is just pushed through the buffer too fast, so that it cannot lose enough energy (ASHP~1205 l/h, buffer circuit pump at lowest setting). Could the 7kW unit work without the buffer (or have it in series as a volumiser only, rather than as a buffer in parallel)? If there is resistance and the ASHP cannot push 1205l/h, would it still be happy as long as it is within the limits given in the manual (540l/h- 1205l/h)? And would the lower flow rate mean a greater delta T and perhaps better efficiency? I guess its not that simple... still hoping that I am not stuck with this bad efficiency and too big ASHP..

@UrbanPlumbers 2 ай бұрын

Sounds like you would be much better off getting rid of the buffer. Although 3.5 isnt terrible but most likely can be improved. Small bungalow most likely doesn’t need a 7kW unit.

@Felix-st2ue 2 ай бұрын

Would be interesting if the system cycles a lot. And if you haven't done so, already try maximizing the volume through the heating circuit. So either getting rid of any thermostat or just opening them all.

@pip1980 2 ай бұрын

@@UrbanPlumbers COP 3.5 was only for last week actually. COP for May 3.3, SCOP 2.5... so really not happy. The question is how to improve this. Replacing the large ASHP with a smaller one would be too expensive. Taking out the buffer should be OK I guess cost-wise, but would the same ASHP work in that scenario, i.e. could it work well with a lower flow than 1205l/h ? Pipework is all new. I don't think they did the calculations like you show in the video, but small house so perhaps not too complicated anyway?

@pip1980 2 ай бұрын

@Felix-st2ue thanks, compressor hours/compressor starts = 1.5 h per start. (4113/2776). Building pump hours/starts= 11h per start (6279/589). If I understand correctly, that should be fine, i.e. not short-cycling? The flow temperatures are also usually very low as per heat curve 0.4. I have all radiators fully open (no UFH) and only weather compensation so no indoor thermostats. Could perhaps the reported yield figure be far off? Energy consumption by ASHP was 2400kWh per year; if I do some wishful thinking and assume that our heat use was actually around 8400kWh, then the SCOP would have been 3.5. The EPC estimate for our house is around 7500kWh/yr. Our gas use before was around 10,000 kWh/yr (combi boiler).

@Felix-st2ue 2 ай бұрын

@pip1980 Well, it's not terrible but not exactly great either. You could try to increase the hysteresis a bit. That way, it should be running for longer but less often. But in the end, the buffer seems to be the issue here. What's interesting to me is that the heating circuit pump has only 50% more hours of runtime compared to the heatpump. But it has only a fraction of the starts... To me, that's an indicator that there should be room for improvement.

@mihaiachim5299 2 ай бұрын

@ 7:09 why you don’t use Esbe 3way valve? I know you like them + you are not a low budget plumber … Only the price is you’re reason ? Or they are other reasons like switch time ?

@gerardfry4876 Ай бұрын

What do you think to small bore pipework (10mm copper )and upsizing rads for heat pump lower heat temp, is this something you would straight away say it needs upgrading?

@winteriscoming4379 Ай бұрын

Hey, what do you think of residential MVHR systems. About to do a self build, approx 4000 sq ft and considering one as well as an air source heat pump system

@carlwhitaker5151 Ай бұрын

Hi, enjoy your videos, quick question, how do you get on with extended warranties if not using glycol? Samsung requires a backup heater if no glycol, which you can only get from a buffer.... .what if you don't need a buffer?? Catch 22

@UrbanPlumbers Ай бұрын

Don’t use Samsung. Viessmann and NIBE don’t require glycol or anti freeze valves.

@pungusattah 2 ай бұрын

What controls the diverter valve? Do you have a control system to do this?

@UrbanPlumbers 2 ай бұрын

Heat pump controls control the diverter

@stufq 2 ай бұрын

Szymon can you recommend an app for heat loss calculation for diy? Need to figure it out if my house need more insulation?

@anthonystark8646 Ай бұрын

Heat Engineer do have a free "rough idea" calculator. Or Heat Punk

@seanoconnor8843 2 ай бұрын

Heating engineering

@giuseppe072000 2 ай бұрын

A link with apps it will be a good idea

@gerardfry4876 Ай бұрын

what Lidar senser do you use?

@evilbanditbetamax 2 ай бұрын

Can someone recommend software for calculating heat loss please?

@FrankReif 2 ай бұрын

It's a shame wye/tee fittings aren't more common/affordable. Anything to extend the radius of the bends.

@nguyenxuanson 2 ай бұрын

4.4 COP : doés it include domestic hot water?

@UrbanPlumbers 2 ай бұрын

Yes

@rowanballinger3690 2 ай бұрын

What app do you use for the lidar?

@UrbanPlumbers 2 ай бұрын

Polycam or magic plan

@rowanballinger3690 2 ай бұрын

@@UrbanPlumbers thanks

@goldenretriever6261 2 ай бұрын

Is this a very big house for England?

@bjorn2625 Ай бұрын

Yes.

@giuseppe072000 2 ай бұрын

I don't find this file's

@UrbanPlumbers 2 ай бұрын

I will upload them by the end of the week. Sorry busy!

@giuseppe072000 Ай бұрын

What week?

@davideyres955 2 ай бұрын

It’s a shame you can’t put the AC below the heatpump as the ac will produce hot air and the heat pump will produce cold air or at least that’s what I suspect.

@normanboyes4983 2 ай бұрын

Do you really think they will be cooling the house while trying to heat it?

@BenIsInSweden 2 ай бұрын

Is it cheating that you showed the heat pump being installed before asking what the heat loss is? 🤣 Single fan vaillant, and almost square, so it's the 7kW unit, so looking at between ~6 and ~8kw. I'm going to go with 6.8kW

@beexpressplumbing 9 күн бұрын

More equipment, higher cost of parts? All that mlcp has to cost as much as a buffer.....

@UrbanPlumbers Сағат бұрын

£80 per 25m roll - so around £160 plus fittings on this job

@mihaiachim5299 2 ай бұрын

You should take more care of yourself and not reply to us late in the night (Even if we all apreciate It)i, try to not ruin your health. You look tired + I Think your Family needs you too, now and in the long run … 😊

@jabberwockytdi8901 Ай бұрын

Shows how poor trades education is in the UK .......

@the1beard 2 ай бұрын

So complicated.. May as well forget it. This is insanity

@UrbanPlumbers 2 ай бұрын

Forget to have decent heating? Those principles apply to any heat source - boilers including

@steve_787 2 ай бұрын

I think it just highlights how little effort has been put into most heating design. Just running any old pipework diameter around and then oversizing a boiler to be on the safe side. Makes me wonder just how inefficient and wasteful most homes must be.

@normanboyes4983 2 ай бұрын

Are you a homeowner or a plumber?