Great video Derek, and thank you for all the info you have put here on KZread, It helped me a lot in preparing for my ACS and getting on the gas safe register. Much appreciated 👍

This is one of the best videos I have ever seen... very educational and it helped me a lot. Cheers !

Derek that is the most informative to the point home gas boiler video I have see thank you, amazing performance.

Great IMFORMATIVE VIDEO and very concise, learnt a lot !! keep up the GOOD work !! Retired plumber and heating engineer still learning in my 70 year's young !!

Top Tips on the set up of any system! My 25 year old Valiant combi is hanging in there but for how long who knows keeping it alive by descaling heat plate each year and replacing parts as they leak is working for now. A new boiler & installation cost vs energy savings and new boiler in 15 years approx is food for thought & i found your video very informative especially about the heat controls & modulation! Thank you!!!

Excellent video - thank you for your time and effort. Will definitely help me make an informed choice when I replace my 40 year old Ideal CF60N!

Very helpful video I got stuck my Worcester Bosch boiler was failing badly I've now had it replaced it with a ideal logic very happy with it

Great video to unravel the points to consider when selecting a replacement boiler/ ch system. so much technology about its easy to over specify if you just read the adverts.

Excellent video Derek, packed with a wide range of information its very difficult for the average consumer (me) to take in. Watched this video a couple of days after my heating guy advised and fitted (replacement) a Worcester Greenstar 30si in our medium size 1930's solid wall double fronted semi with one bathroom. Hopefully a good choice for my circumstances. In the process of trying to work out the best auto setting for the EPH. Also watched a very simple balancing video from "Skill Builder", if needed in the future. I used to think computers (my expertise) were complex but heating a house is up there with them :)

Excellent video Derek, very well presented & with valuable information about boilers. Great video. 👍👍😀

An excellent video, brilliant honest information, and no waffle.thanks so much ,

Good video, as an gas safe registered installer I agreed with most of the points raised. When installing a system or heat only boiler it’s important to stress to the uninformed consumer that there isn’t a diverter valve to breakdown internally on the boiler with that said would be good to hear opinions on the best type of materials used on heat exchangers these days, my self I am now moving towards stainless steel as it’s seems more durable long term(10 years on) . 100% agree on a clean system being a must, power flushing and inhibitor is essential .

So much useful information. Especially for us guys who are new to the game. Found this really interesting. I’ll be watching this again for sure. Thanks Derek 👍🏻 Asian Jon. Training.

Another awesome video thanks. Lots of useful information as usual from you given us honest reviews . I agree with you it doesn’t matter what boiler you fit if you don’t set it up right in the beginning it’s never going to last 😂.

What a good informative video. As a retired ships chief engineer I like to think I know a little bit about various boilers/systems. This video explains essentials in simple terms that most customers will be able to understand and so help them make a good decision. By the way I have just had installed a Worcester-Bosch Style 8000, 35Kw combi boiler and EasyControl thermostat by an accredited installer and so get the 12 year guarantee. (This replaced 30+ years old Worcester). So far, so very good. The only comment I would make is that there are no written instructions available for the EasyControl smart phone app, which is easy to use but I would have liked a detailed explanation. Old fashioned I know!

@tomkatgastraining

3 жыл бұрын

Thanks for watching and your comment cheers 👍🏻

Outstanding communication! Pleased to have my combi de-mystified, and to be so much better prepared for choosing replacement. Ten-year old Baxi condenser keeps going but pressure can be erratic, up and down. Would like to learn optimum balance between setting of water temperature, room thermostat and use of the timer because boiler seems happier set to 'always on' but regulated only by the remote room thermostat. This beastly Baxi dislikes being off for several hours, won't let me go away for a weekend!

Very informative video, many thanks. I visited the Bosch Worcester factory about 8 years ago. It was very impressive particularly the Quality Assurance and testing programmes.

I had an Ideal Combi boiler installed early 2019. I think they took the ancient Baxi one I had to an archaeology museum? I have a hand held remote about the size of a small round alarm clock with touch sensitive controls to control the heating. It bypasses all the thermostat and other controls on the wall. I get hot water on demand, so only pay to heat up what I use. It has slashed my utility costs by a third. Absolutely amazing. I had previously gone through two harsh winters with no heating or hot water, so I really appreciated getting the new boiler and then some. Plus it freed up so much more storage room in both my cupboards as I no longer required a cylinder. Two chaps working full time were all done and completed in just six hours. They even declined a cup of tea when I offered and I make good tea. 👍😜🤦‍♂️👀✌

Excellent video Derek... great depth on info

great video! i actually got 13 years out of an ideal isar 24 but it was constantly on preheat HW (costly if you live alone), very basic CH modulation with over sensitive HW activation (as 1 drip from a HW tap run the boiler at full). My new Worcester 30i CH has noticeably better modulation as it turns the burner off before reaching set temp, as not to over shoot set temp. HW is perfect for my mixer shower with 12.5 ltrs per min. The Eco option finally stops preheating the HW in summer that dogged the isar, but only time will tell especially with my gas bill.

@mrcombiBedford

3 жыл бұрын

Fantastic glad you fixed the problem. I did Park Homes and loads had pre heat ON which on LPG is expensive . regards george staszak

The advent of condensing boilers is probably the most significant leap in domestic boiler efficiency - ever. It is also the biggest job creation exercise keeping ‘gas engineers’ busy installing them and repairing them. However to gain fuel burn efficiency and keep the house comfortable, there needs to be less focus on which is the ‘best boiler’ and much more focus on the house, in terms of the heat losses, selecting a boiler of the right size and the sophistication of the control system to garner back efficiency. In addition, there needs to be some analysis of required system flow rates and what amendments are needed to the current pipework to enable that. Also, effective power flushing takes time - it is not a 30 minute exercise. I am not at all sure if all ‘gas engineers’ are equal to the task, many are not able to do the above (or cannot be bothered) and just offer a ‘white box solution’ - hang it on the wall in a morning - job done. But it may not be the right boiler and any paper efficiencies may never be realised.

Excellent video. Practical and loads of insight.

What an excellent video - this guy obviously knows what hes talking about - wish i could use him personally to sort my very old system but living in cornwall doubt thats possible -

personally, i dont think any of the modern boilers match up to the reliability of the old boilers from 30 years old and older, its important to mention that if you have an old boiler, you have a peace of mind that they were bullet proof. engineers call them bullet proof because they hardly ever broke down, be it an old glowworm, potterton, vaillant, vulcan, ideal, worcester, or any other. there are still people who dont realise that the have a boiler in the chimney, because they hardly broke down and over time, in 15 , 20 years, the person forgot they had a boiler in the chimney. i know someone will point out the service issue, but im just making a point. i did a flue sample on a 30 year old boiler and the co /co2 was 0.0008 i think, and on the same day, another 2 year old boiler, and it was 0.001, so the efficiency on the old was better. just like some old and new cars. people make savings on gas bills, bit sometimes the repair on a new boiler is huge, even a new boiler in some cases, i had this twice on a viessmann. and getting the right parts onviessman is hard if the serial number happens to have been rubbed out or something.dirt in systems didnt much affect in causing boiler breakdowns before the turbomax ranges, same goes with expansion vessels and diverter, its the quality of parts thats gone down, o rings lasted 20 years without going hard, now its very less, same with fibre washers, before they were leather, now its like some paper composite.boilers were bulet proof. no manufacturer can claim theirs as bullet proof. they all keep their own old boilers in their training centers because the old boilers were meant to last a lifetime. didnt need a warranty of 5 , 10, or 15 years, neither did they need proof that the boiler was serviced (is it about 2 minute with no tools). i thought i would put this comment in because i repair many boilers, and ive repaired 30 year old boilers where engineers said that this cant be repaired, and it cost the customer maybe £70 instead or £3000 (plus problems for warranty due to sludge/debris). old is gold, if it can be fixed, try to fix, try too save the customer money, taking into account the yearly gas bills and what the can actually save.new biler life 5 years? maybe less ?im not being argumentative, but i thought i would show a different genuine view point.

@mrcombiBedford

3 жыл бұрын

You are correct those old boilers had a gas valve and stat so they never broke down. As rich as you are your gas bill would be over double it is today and not very green.

@SalimKhan-gk1fh

3 жыл бұрын

Dear zubs ,I’m afraid I think you are totally wrong in your ideas about boilers yes the old ones were a bit more reliable a bit like 1980s cars and mobile phones they were built to last for decades but this is not what people want they are more Conscience of the environmental impact of running an old cast-iron boiler which is only 60% efficient that’s literally throwing 40% of energy through the flue pipe! secondly, how did you have trouble getting parts for a viessmann boiler? Serial number rubbed off? There is a serial number on top of the boiler ,another one on the base panel of the boiler and also another one inside the boiler also there is the part number visible on most of the parts ! nine years ago I removed a Potterton netaheat cast-iron boiler and replaced with a viessmann vitodens 100 Combination boiler, during the last nine years it has been reliable and has paid for itself on the gas savings alone, 9 years x £300 per year = £2700 savings ! how did you find that the new combination boilers only last five years or less? This is the first time I have heard of this if you fit a quality combination boiler (preferably German-made) it will last you 15 years and if you change your boiler after 15 years you will not be complaining as it will have served you well . It is all down to the installation quality . I only fit viessmann now since last 10 years, top quality

@mrcombiBedford

3 жыл бұрын

@@SalimKhan-gk1fh Hi Salim, I have installed many Viessmann's brilliant boiler and after sales, never had one problem, we have one here for Training, the point is efficances. In the 1970 80's loads of back boilers big cast iron high poluting units, thanks to very cleaver engineers in R&D we now have 90%+. Offically all boiers are ment for 12 years, some will last much longer if installed / maintained correctly. Too many are not thus last 5 years don't blame ihe manufacture blame the installer. Why do we still see photos in Gas Installer mag. My 2 installers are told NEVER work on any boiler over 15 and if the repair in over £500 then fit a Ravenheat 98HE. Thanks for your reply, regards george staszak

@mrcombiBedford

3 жыл бұрын

Dear Zubs, When I started in 1970 we all just installed because we were not trainined to repair untill Vaillant started, thank God. 5 years later they broke down thus a new bread (me) evolved breakdown engineers. for the next 30 years I spend fixing installs and faults. Today 2020 we get the same: Nr1 fault is undersized gas pipe, sludge, no by-pass, controls etc. etc. why is the standard so low? Take care george staszak Mr Combi Training

@SalimKhan-gk1fh

3 жыл бұрын

@@mrcombiBedford Hi George thank you for your reply the reason I gave big reply was because zubs he’s giving the wrong information to people! okay I agree 1970s & 80’s cast-iron boiler was the most reliable,But they are not efficient at all, Most of the fuel is wasted and over 40% is going out to the flu to atmosphere as pollution okay so 1980s Mercedes was the best very solid and built like a tank, but these days people will not accept 20 mpg efficiency from their car! I gave you example of the viessmann vitodens boiler I fitted , fitting cost was about £2000 butBecause it is efficient it has saved £300 per year on gas consumption, Very reliable last nine years if it last another 5-6 years this is okay for customer. Are you based in the UK ?because in the UK the installers are not doing very good job of the installation.

Very good information and gives you the best one for the house. Thanks

Such an important video knowing which boiler is compatible for each home. ❤

This is one of the best videos I have ever seen

@prg2812

3 жыл бұрын

Was he leaning on a hob knob at the beginning. I could hear a spark generator running?

Excellent video with lots of information, even after 2 years.

Hi Tomkat, I had a Stelrad old style Boiler with a Hot Water Tank upstairs. It worked perfectly for 45 years until it started to leak rusty water last winter. I got a Vaillant 830 Combi replacement and i must say what a life changer not having to heat the water tank up to have a bath and also whilst in bed during the winter i can switch on the heating with a remote control box during the night from my bed . I do suspect though that my new Boiler is oversized for a 3 Bedroom House. Who knows. Interestingly my bills are not any better, especially the Electric which is quite high. Stevie in Fife.

@stephendoherty8291

Жыл бұрын

Worth asking the next boiler servicing (ideally the same firm who installed your one or who installs the same brand) and ask what can be done to make it run more efficiently. I've also heard that only some controllers work with X gas boiler brands, forget smart controls. The bigger issue is that most non supersmart controls are not tested against boilers

Brilliant video Sir. Very informative. Thank you. Peace be unto you.

great information in this video Derek, I have a Vokera Mynute E16 in our 3 bed house for 16 years. Time to change to Bosch I think?

Great informative video. Confirmed my understanding about the complete installation needing to be considered and done properly. I'm not a heating engineer, however it surprises me how many have commented and insisted they know the best boiler. Maybe they need to look at the video again but with an open mind. Pros - great advice on what to consider for consumers and heating engineers. Cons - the cuts in the video are a bit annoying at first but well worth persevering. Keep up the good work!

@SalimKhan-gk1fh

3 жыл бұрын

Don’t be surprised by people leaving a comment on which they think is the best best I left a comment at the top of this page just below the video . this is through 15 years experience of fitting a particular brand ( viessmann) From my point of view as an engineer and from the customer’s point of view in terms of satisfaction this brand is number one in Europe & uk its also the most efficient

@davidpritchard9829

3 жыл бұрын

@@SalimKhan-gk1fh I understand your reply and agree that there are very good reports of satisfied customers and installers with Viessman but you are looking with a very narrow view as a good installer who ensures that you only fit to a good, clean system. A Viessman boiler properly installed may well be the best, or at least one of the best, however the point that Derek was making with the video is that the best boiler fitted by an installer that takes short-cuts is more likely to experience problems than a cheaper boiler installed properly. The other point is that if a customer expects a particular feature such as instant hot water, they won't be satisfied with a combi boiler with a long pipe run to the taps. To sum it up, it is important to use a good heating engineer who will discuss and advise on the most suitable boiler TYPE and will then source and properly install an affordable brand. I am looking at a Viessman or Worcester Bosch System boiler plus new cylinder at the moment but will find an accredited installer with good feedback as I believe that it will give me the best chance of an installation which is trouble free in the future (provided that the 12 monthly services are performed!).

Excellent Overview. Thank you. I have had absolute nightmares with plumbers who have done terrible jobs. They're primary concern is to charge as much money as possible and do a rubbish job, with minimum effort. NOT ALL plumbers are like this and there are some Excellent plumbers out there I'm sure. It's got so bad that in the end I have decided to Give-Up and tune into this channel and learn about central heating systems / plumbing. I'll then be able to understand and check the design and their work. Fortunately I have a technical background so it all makes sense. Should I need to do this though? It is what it is / that's life. Thank you again, great information.

Thank You for your Reply Tomcat Gas Training , I've lived and brought up My family on mostly 'Baxi' back Boilers and other makes and I can assure you that ALL of them are mounted on an OUTSIDE Wall were they get their Air supply and the Exaused goes up the Chimney Look at the Facts How many People have Died in the Twenty Year Period of Baxi Type Boilers and How many in Todays ????

Have had a Potterton system boiler for 13 years and only one warranty issue. Getting kitchen done and replacing with Baxi 800 - backed with a 10-year-warranty. Spoke to three different gas engineers who all rate the Baxi for ease of fitting and reliability.

Excellent, a very informative video, I’ve learned a lot, Thanks

Ideal is the worst had problems since day one in new property. Thanks for video

@mariamalik4810

3 жыл бұрын

You're unlucky bhaijee as they're the best and the Asian choice. Worcester Bosch use an aluminium heat exchanger which is substandard vs. stainless steel in the Ideal.

Great video has helped me decide which boiler to get thanks 👍

Being one who records whilst they work and edits in the twilight hours. I know the difficulties and how much effort goes into making these videos. Material like this is undervalued. Education has changed so much with KZread. Society are gaining the equivalent of a KZread plumbing degree. It's good when it's used for something positive like making individuals better engineers. Onsite experience is vital as well as real qualifications. Yet this media stream and experience passed on is helping nations strive to better engineering standards. It would have been a game changer if I had some of these videos when I initially qualified as a plumber 13 years ago. There was hardly anything like this to watch. It's great that the information is there for those that are thirsty to grow in their knowledge of the trade.

I like these video's immensely. These are PROPER reviews,and the likes of yourself and allen hart give an absolutely no-nonsense verdict on these products. straight talking yorkshiremen do not mince their words.You will get a brutally honest opinion on stuff,

Good n honest video many thanks, can I ask If i remember right I was told for condensing boilers to work at their best here must be a difference of 20 degrees between flow n return am not sure If i get that much difference but all my rads are way oversize so am hopping this is the case am retired now for over 10 ears n had a replacement boiler a Vaillant they did an OK job But they replaced all my rad valves taking away all the Peglers n draytons n replacing them with cheap rad valves n stuck the condensing pipe from the boiler in the rainwater! I was worried about leaks why I never changed it myself but so far just under a year pressure not dropped at all, in my experience the Best service of any manufacturer I got from Potterton installed a Neutaheat Friday lit it up worked for a while n stopped phone them about 1 pm n Next Morning Saturday 2 guys turned up with a new boiler had a look at the boiler then changed it to a new one, that was I think early 80s, Vaillant is Nothing as good on servicing but I had a Vaillant cause their 242s n 282s where Unbreakable many I insulted worked for 20 plus years very unlike many others cheers n keep safe mate

Thank you!!! This is a very good information!!!

I dont know about Best boiler But this is one of the the BEST Videos for our market...Thanks and will catch up soon..

@mrcombiBedford

3 жыл бұрын

I think the best 3 boilers are the new W Bosch, Vaillant green IQ and Intergas, regards george

@chohanchohan8208

3 жыл бұрын

@@mrcombiBedford WB old rubbish recycled...at least they made an effort on the PRV...Vaillant yes agreed and Intergas Nope takes too long for parts to arrive and they are extortionate prices on parts AND their technical support is shite BAXI Alpha Vaillant all the way

@mrcombiBedford

3 жыл бұрын

@@chohanchohan8208 I used to install loads of Intergas, my two installers put loads in the very very reliable one pressure switch (muck) part from P Centre was 2 days. Mine is 8 years our daughter is 3 years both zero faults. As always it's down to installation and 12 month regular maintenance , regards george

Really good information. Proves that there is no such thing as a 'best' boiler just like there is no such thing as a best car. It depends what's best for you.

Very Infomative video and clear explanantion as to why regular maintenance is a top priority and key to performance and longevity for boilers and components. 😀Right size selection for the boiler is well understood especially with high modulation. You paid great emphasis as to this point and as I am about to buy a new boiler (emergency purchase) I am now reassessing changes to my selection. My only concern is rightsizing for my current house size in the knowledge renovation which will imrove thermal efficiency of the home and add a shower and one bedroom will make choice of boiler size questionable. Based on that do I right size for the additional load now? If I do then I would think there is an option to install a non vented system at a later date for hot water supply. Option to install unvented now is not possible due to space for cylinder. But I would consider that a combi boiler with a percentage of available overcapcity now could be used to service an unvented heat exchanger via diverter valve at a later date in event of introduction of living space and hot watwer load. Thanks again for yiour informative video. maintance maintance

I had a servo warm boiler for twenty years then 19 years till vaillent Thermo compact boiler still running good.

I defiantly going to stick with my ideal Mexico 2, been running for 56yrs without any problems 😀 (just found out it was installed 56yrs ago)

@jayzeebeezee7442

2 жыл бұрын

I just replaced the same boiler, Ideal Mexico in my house with a modern Combi. It must have been at least 40 years old. Essentially there was nothing wrong with it apart from its total inefficiency and I personally battled with replacing something that wasn't broken. I'm glad I did. My gas bill has now reduced remarkably by 70% and thus my carbon footprint. Which is a good thing. It is also extremely efficient and warms my house so quickly compared to the old boiler. The old boiler was bombproof and good for the time but hardly 'Ideal' for the modern world. Excuse the pun. Food for thought.

@micmac69

Жыл бұрын

I installed the Mexico 2🤔 I thought they came out in the late 80,s even early 90's

@tonygard1424

9 ай бұрын

Late 80s boiler.

Loved the video. Would you recommend the Vokera Evolve 35S system boiler?

Thank you Derek, for the best videos very educational and it helped me a lot. Cheers ! 👏👏👍

Superb Video Derek. I love my Baxi 600

Great video......top notch information...well presented...ta.

Thanks mate,excellent information 😁👍👏👏👏

I'd like to see reviews that show what thermostats are opentherm compatible. Few mention it. Like to also see some advise on when to do a powerflush and where should TRVs go. Also some future reviews on water tanks, hybrid gas and heat pumps and what additives are recommended.

yes I did enjoy the video and it is very informative, I am not impressed with the running costs/maintentance of boilers produced over the last 20 year .. I would have liked to hear you comment on Saunier Duval also as I regularly see Thelia/ Thema being replaced after 25 years only because of their age and the introduction of government schemes. I know they were from a different era and don't have the high tech/complcations of a condensing boiler with extensive electronics but the running costs over the lifetime has been very small by comparison .. would you like to make a short comment? thank you.

An excellent broad view of the issues that should be considered with a gas heating installation. As several have remarked, there is a real question about progress. Reliability and product quality has become questionable, sometimes brought on by poor quality maintenance. Efficiency payback takes so long that a 10 year life expectancy does not equate.

Lots of useful information 👍🏻 But disappointed that the new Navien cond boiler was not included for 2020 🤔🙁

I agree with you Zubs as that has been my experience over the last 20 years after replacing ye olde faithful cast iron boiler. Maybe it’s just down to bad luck but since then I’ve had three different boilers , Vaillant failed after 5 years despite expensive attempts to repair , Potterton lasted 8 years again with expensive repairs & touch wood Baxi is still going but again with repairs Baxi . Most of the repairs always seemed to involve what I would call the electrical components of the boiler & the cost of replacing two ‘mother boards’ ( is that the right term ?) was eye watering. In my case even if as someone stated the cost of gas would be double it still wouldn’t have been more than installation, servicing & repair costs. As for the environmental side of it - well two boilers that have gone to the tip in the meantime isn’t very green.

@ianwilson6462

3 жыл бұрын

This is why I am tempted to keep my 40 year old Ideal boiler. Minimal costs, a new gas valve and a couple of thermocouples. With corrosion inhibitor and smart valves only use about £700 of gas a year for a 2 bedroom semi-detached bungalow. Can't see a new boiler with yearly maintenance etc really being cheaper over 10years.

@kevinwilliams1421

2 жыл бұрын

@Corsham Viton they just farm seem to fix their diverter and low water sensor problems

Very good piece of advice highly professional brilliant

CH System design is more important than simply boiler choice. I designed the CH system for my new house in 1982 no room thermostat no isolation valves just danfoss TRV'S and RAV HW conroller with potterton Netaheat 16/22 sealed cabinet boiler with fan assisted flue an spark ignition(no pilot flame) the system ran perfectly efficently for over 35 years and was only changed when i was unable to obtain replacement parts for the boiler . The TVR's remain installed and working. The Potterton 16/22 boiler was the most advanced boiler on the market in 1982 and would still be operating today if i was able to obtain spare parts for it. My New condensing boiler (installed in 2007) produced problems from installation but then the manufacturers service document lists almost 100 fault conditions. The old boilers with cast iron heat exchangers fan assisted flue and simple controls where and still are the most reliable .

I'm not a gas fitter, but I choose an Intergas ECO RF 36. No plastic parts and leaks, no diverter valve or plate heat exchanger to get clogged up. Two years old and no problems so far.

Fascinating video. I'm not sure if my vaillant echotech pro boiler is a modulating boiler. But unless it's very cold the boiler does click on & off often. You said this is bad. Would it be better to turn the radiator water temp down so the boiler stays on longer? Even if its not modulating?

Great video, answered all my questions.

Great video, well done.

My WB system boiler has a warranty of 8 years . Installed last September. We had a 80,000BTU CF floor mounted Ideal E Type. Fabulous. Worked 44 years and totally reliable only maintenance a thermocouple every 25 years. Dead easy to replace. But energy prices have got at me. We have a 4 bed house , fairly large but my wife wanted an airing cupboard. No combi then. The new WB is in the garage so no noise ( attached to house closely) . I hope it lasts a long time but won't last 44 years but nor will gas central heating. The world has gone mad. I am too old to bother.

I have the best boiler .A ideal stnd 40/60 boiler fitted in 67 and ( repeat ).never let me down ,in a fairly big detached house 10 rads.Bills are fairly low ,and cannot have it on full as its gets tropical inside . So simple ,cast iron heat exchanger ,gas valve ,and thermostat .And pump renewed 25 years ago .How can modern boilers beat that .lol

Valliant Boilers: the Mercedes benz of boilers. My diverter valve started to leak in two years but then again: my radiators were not flushed: Had them flushed and since then the boilder worked flawlessly.

Great video Derek ......Cheers fella.

Great video, just signed up to British Gas to install a Worster Bosch condensing boiler and a system flush plus digital programmer, be interesting to see how it performs!!!

@kirkcooper8184

2 жыл бұрын

I wouldn't have used British gas to be honest I'd have found a local company British gas are just using sub contractors now which there paying very little and they expect a power flush and boiler fit by the engineer and only paying 395 for it Personally I'd be charging a thousand for power flush and fitting of boiler

Worcesters had so many problems in the past, whichever model. I liked Intergas combis: A cast alloy burner/heat exchanger with two copper tubes snaking through it, 1 about 22mm for heating, the other about 15mm for HW (heated directly by the burner). No diverter valve or secondary HE for HW to clog up - the pump just doesn't run in HW mode; no auto air vent to seize up - manual bleed valve instead. The 240v fans on the larger capacity ones had problems, but the 24v ones were fine. 10 year guarantee, too. Dutch firm, Worcester wanted to buy them out. They only had 1 or 2 models back then - a bewildering choice now

I have a Viessmann 200w , jig , flue and adey magnaclean , ready to be installed next week after a 2 hour magna cleanse . You are right, The home owner knows his house ,the heating engineer hopefully is more knowledgeable about correct operation and installation and commissioning. Hopefully this boiler will be keeping up and not playing catch up, with the weather compensation on a North wall.

@bigmacntings7451

Жыл бұрын

yes indeed. I was planning on a baxi 624 pack bought new,but scoured marketplace and got a worcester+flue for the same price.adey filter was courtesy of marketplace too. not shy about saying this but with gas prices going the way they are i needed a quick fix.the quotes i was getting for a new full system was £1000+ over what i could afford if i bought new on the market. gumtree and FB markeplace are your friends!...couldn't have done this otherwise. all real deal genuine parts,just leftovers to someon'es DIYjob.

Great video with so much information about things I hadn't taken into consideration. I have an old Worcester HiFlow 35 stand alone boiler and the 1st thing I need to do is install a magnetic filter. I have fitted smart valves on all the radiators which has increased the efficiency of the system. The other question which wasn't covered was what fuel are we going to be using in 10 years time. I live in the West Midlands and Natural gas is being mixed with Hydrogen on a trial at 85-15% ratios. Do you think that we're going to be turning to 100% and are therefore going to need to have new burners fitted like we did when moving from coal gas to natural gas?

@tomkatgastraining

3 жыл бұрын

All new boilers will have gas valves that can tell how much hydrogen is with the gas. I believe if we keep the hydrogen lower than 20% the gas valves don’t need changing in the older boilers. Thanks for watching cheers 👍🏻

Thank you. Very informative. Cheers

Very informative video thank you

Agree with the emphasis on system quality - hugely overlooked and plays a big part in the reliability of any cheap or expensive boiler. No such thing as a bad boiler 🤓

@DrFod

3 жыл бұрын

@ferkemall My mother has had her Thorn boiler since 1980 and it has never let her down. Only 60% efficient though!

I thought that the new modern combi and system boilers had modulating gas valves that varied the size of the flame according to demand so that when the heat requirement was low the flame was low. Say in the region of 6 Kw hour, and up to what ever the output capacity of the boiler for high demand. so it did not matter if you had a slightly larger combi boiler to give a higher capacity for domestic hot water for a bath that filled reasonably quickly.

Thanks for the video derek on boilers and different types of heating systems does the tpi analyser have a sweep mode ?

@tomkatgastraining

3 жыл бұрын

Oh not sure mate 🤔

Can you explain range rating and modulating? Is it worth range rating? I think my boilers is too powerful and would prefer to power it down? Looks abit complicated to me though. CN you just let it cycle all the time instead? Slightly confused.

It's probably fair to say that combi-boilers grew to dominance mainly through new-builds. The boiler itself might be a bit more expensive than heat-only, but for big house builders they much prefer nowadays to fit a combi because it saves them the added cost, manpower, and extra space requirements that come with fitting a water tank and all the related plumbing and wiring. If you live in an older house with a tank already fitted, you've got to think hard about whether you're better off getting rid of it.

Very good explanations , really helpful

@ Tomkat/Derek, I had 2 companies visits& quoted for like for like combiboilers, Bosch 30 si, and vaillant 30kw pure, can any of these boilers cope with another electric shower room only added in the future. Currently i only have one bathroom with electric shower over bath. I hope you can give me your thoughts& advice on this. Also, one of the company has indicated to do a flushing of the system after the boiler had been fixed, is this the correct standard of installation of new boiler? Surely it would be better to flush the old pipe,and rads before any new ones are put in place, ie. boiler, and/or new rads. Thank you for for the useful advise& info, and sharing your time& expertise.

Quite right about old boilers. I have a 25 year old Camray Oil boiler and still going strong. What is the progress having to renew them every 10 years. What is the point of high efficiency when they only last 10 years?

@edc1569

2 жыл бұрын

Burn less fuel?

@rodneycooperLMSCoach

2 жыл бұрын

@@edc1569 Yes I suppose so with 30% extra efficiency they would pay for themselves in 10 years . Since I posted that comment I sold my house with the old boiler and got a house with one of the new ones in it and what really makes the difference is in new radiators.

@CommercialGasEngineerVideos

Жыл бұрын

True, what's the point

@rodneycooperLMSCoach

Жыл бұрын

@@CommercialGasEngineerVideos The money that is saved in fuel over a period of the life of the boiler is cancelled out by the cost of its replacement. I think I would rather have an inefficient boiler that could go on for 30 years than one that has to be replaced every 8 or so years.

@CommercialGasEngineerVideos

Жыл бұрын

@@rodneycooperLMSCoach all seems like a scam to me. Think I'd rather have a machine that's less efficient but lasts 30 years than the headache and cost of replacing a boiler every 10 years. So many environmental friendly schemes seem like they are there to line pockets rather than save the environment or the customers outgoings.

Back in the 80s had a baxi with a dial for temp 1-6 left it on 1 spring and autumn and left the boiler on cheap as chips to run toasty warm no room stat

I have had my VIESSMANN 200W Weather Compensation Combination Boiler for 13 years, regular service only recently had new water flow switch, spark contacts, flame electrode, burner chamber gasget, & new outside temperature sensor, its going to be upgraded for Internet and new low energy pump, so yes I'm very happy its well made for sure 👍

Baxi 800 range gets my vote. Stainless heat exchangers are definitely best.

Thank you! you are amazing!! wonderfull Video I'm living in apartment and I have a Ferrioli boiler, can you help me, because the pressure on my boiler went up to, from 1.5 to 2.3 and I stop using it, I want to learning how to reduce it back to 1.5 and what is the correct pressure to be called normal? Is very difficult to fined a video for how to reduce pressure for ferrolli. i need help ASAP Thank You

Thanks for the through info, I am having a new boiler installed next week. it was good to know all this.

@SalimKhan-gk1fh

3 жыл бұрын

The best one here is the last one he showed which is viessmann. They are currently the best brand in UK and across Europe

Terrific video Derek. In a 4 bed semi circa1900 we are in need of replacing the Vaillant 828 combi and seem to be favouring the Viessmann Vitodens 100-W range rating 35kW. We would welcome your views on the boiler sizing for the property. We realise there is an awful lot to consider as highlighted in the video (clean system, boiler modulation....) and wondered if there was some unbiased help out there to dicuss this matter. This is a very important call to make.

@tomkatgastraining

3 жыл бұрын

Hopefully the engineer you choose to install your boiler will be able to give you all the advice you need. Just think about how much water you require ie how many bathrooms do you have and what flow rate at the taps that’s what will influence the size of your boiler first.

@harrythornton6936

3 жыл бұрын

@@tomkatgastraining Well presently there is one bathroom with a shower over the bath but thought to plan for a further separate shower cubicle. There's also hot water in the kitchen. Not certain about suitable flow rates at the taps. Can you recommend? Not keen to have engineers in the home just at the moment. Maybe we can achieve something remotely. Any further information welcome.

Very informative learned a lot 😎😎😎

Great overview, thanks

Brilliant video everyone should take note of the comments, it's NOT the boiler but the installation that ruins boiler and keeps breaking down and costing money. Love the videos form TomKat, regards george staszak Mr Combi Training

@tomkatgastraining

3 жыл бұрын

Thanks for watching and your comment cheers 👍🏻

@russthomas02

3 жыл бұрын

Disagree ... as a repair engineer there are plenty of boilers I wouldn’t touch with a barge pole these days ... ideal and Worcester are on that list as well now

@tomkatgastraining

3 жыл бұрын

@@russthomas02 great when you can turn down work. As a repair engineer should you look at these boilers as a challenge then and take great satisfaction when you get the boiler running and put a big smile on your customers face.

@russthomas02

3 жыл бұрын

@@tomkatgastraining I repair them no problem but to install for my customers I steer them away from makes that I have to repair often .... why would I recommend a boiler that’s not reliable IMO

@tomkatgastraining

3 жыл бұрын

@@russthomas02 they all seam to give massive warranty’s now on boilers some even giving 12 years and more so I don’t get why as engineers we hate boilers. Don’t get me wrong some are better to fit than others and some have a poor build quality but at the end of the day as the video says it’s all about the best boiler for the customer.

Very informative video Derek. Liked. The modulation range is interesting, which H.O.B has the biggest range and are reaction times from high to low the same across manufacturers.

@tomkatgastraining

3 жыл бұрын

Every boiler and every manufacturer are different

@mariamalik4810

3 жыл бұрын

Biggest range is 10:1 found in the Worcester Bosch heat only Greenstar 8000 Life range.

Really appreciate this video mate. Very informative. Didn’t feel like you were trying to sell me anything. Spot on. 💪🏻

I have to correct what you said regarding Viessmann divertor valves, There was an issue with them way back on the WB1A model between 2006/7. (long since sorted out) Since then they have been bulletproof. Also all Viessmann domestic boiler heat exchangers are manufactured from stainless steel.

@tomkatgastraining

3 жыл бұрын

If you have a dirty heating system a diverter valve will fail no matter how bulletproof you think they are.

Great Video as usual Derek. I love Viessmann and Alpha they have really upped their game.

so the bigger boilers (if you have high HW demand) won’t drop down low enough if you don’t have a big CH demand? Suprised they aren’t more flexible. I want CH to be more efficient but I woudln’t want to have to compromise on HW for that. Should I try and have a simple heat loss calc done for CH if I’m replacing a boiler?

Forget the budget, its Vaillant boilers in all situations, they are not too expensive, especially when your cheaper boiler goes down. They are the most reliable and easy to work on. A dirty system needs cleaning and a magnatite filter should be fitted so your diverter then won't fail. It's the Rolls Royce of boilers and I have been fitting them for over 25years, tried others and regretted it. No brainer!

Excellent video. Thankyou

I grow up with servowarm boilers, the last ten years with a Valliant boiler 👍.

@mrcombiBedford

3 жыл бұрын

I remember Servowarm very good then disappeared. george

@smurftastic3928

3 жыл бұрын

@@mrcombiBedford built like a tank, lasted for years.

@CH-vb5kr

3 жыл бұрын

@@mrcombiBedford Servowarm were taken over by NPower I think. I WAS a customer, asked them to install a Bosc Worcester combi but they ignored what I wanted and installed a shitty Baxi 105HE - so they lost my custom for good and good riddance to them!

@mrcombiBedford

3 жыл бұрын

@@CH-vb5kr Hi CH, thanks for the update, that's very bad they ignored your wishes, 105e is a monster with higher running costs. I think that Baxi is one of a few firms that does not allow down-rating the heating to match your rads out put, I don't like that. Our Unit has 12KW of rads why should I put auto 24KW and expect to save more money than I can now. They won't give me a boiler to test against my Vaillant, I wonder why regards george staszak Mr Combi Training

@nigelsmith6413

3 жыл бұрын

@@CH-vb5kr Servowarm were taken over by Homeserve who then sold the business to Npower.

where does the viessmann 111w ,gloworm maxi flow and w/bosch high flow come in your 3 types of boiler. ..... maybe number 4 . elm le blanc invented the combi bolier with a double pass heat exchanger, as well as the condensing can of beans heat exchanger found in low end w/bosch boilers, valliant was later having shown its combi at ideal home exhibtion .BG wanted a low cost combi package and found the chaffateau later still down the time line.

Vaillant Turbomax, 21 years great service finally replaced last week with a Baxi 830. The Vaillant went through 5 or 6 divertor valves and one fan. I hope the Baxi lasts as long, its much smaller, much quieter and hopefully, more efficient.

@kevinwilliams1421

2 жыл бұрын

I’m surprised you changed that many divertor valves on a tmax..I’ve worked on them for years only replaced a handful

@Vincent-dc6ku

2 жыл бұрын

@@kevinwilliams1421 I think the issue was using refurbished valves rather than new original manufactured valves. Around £40.00 if you send in the old valve against £190.00 to buy new, I used to get between 2 to 3 years out of a refurbished valve before the inevitable loss of hot water at the tap, a few times it was a punctured diaphram, others it was the weak plastic lever not engaging the microswitch. An hour or so to change a valve, as long as you didn't snap the plastic retaining clip at one of the inlets.

@kevinwilliams1421

2 жыл бұрын

@@Vincent-dc6ku 99 times out of a hundred with no hot water on a tmax is the plastic wheel in the flow sensor…now I’ve literally changed hundreds of them