Best Heat Only Gas Boiler - Viessmann vs Baxi 800 / 600 EcoBlue Potterton Main 

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Nice feedback on the Viessmann boiler brand 👍

Thank You so much for your kind words. Happy New Year.

Top down burner is actually a very good idea as it stays very clean and no dirt settles on it, so it stays efficient. When you service top down burners you hardly find any blockages and they just need a brush over with a soft paint brush. All the boilers meet government efficiency standards so there is little point in comparing them. The biggest difference in gas usage depends entirely on the habits of the user, the effectiveness of insulation in the property being heated, plus efficient controls on the boiler and heating system.

@@timhancock6626 : Perhaps my bad luck with top down burner in Ideal Icos HE 24 heat only boiler is making me to come to a negative conclusion about them. I had it serviced yearly( eon, heat serve etc) for 13 years. At the bottom of the heat exchanger, the ash (+ condensation) has hardened up between the fins and the engineer is not able to remove it. Now it is almost preventing the ash to fall down where it can’t be vacuumed. Regarding efficiency, yes all the boilers are efficient in burning up all the gas which reaches the burner, but how much gas does the boiler use up to heat up a ‘standardised’ room?

@@manojsekharan5846 it sets like concrete in the sump of the ISAR/ICOS, but nothing a hammer and long flat blade screwdriver shouldn't be able to handle. Brush and hover out through sump cover plate Then wash down from above, leave overnight with boiler off to let the moisture loosen any crud. Rod through with cleaning blade. I've never seen the fins block on these boilers, only the sump. Bit of work, but normally works. Most of the issues with those boilers due to lack of, or poor servicing. Look after the boiler, it'll look after you. Get Allen round 😉

@@timhancock6626 Top down burners are not always good if the boilers are not serviced correctly. They block up, Sometimes needing a new heat engine. Thanks for the comment. Happy New Year.

I have a viessmann boiler in service ,it is the heat only model and the running cost according to the smart meter is around 19p an hour with the boiler giving out 58° water temperature to the radiators. By any means it is very very economical

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Happy new year Allen . Thank you for the very informative content you share on your channel, it’s very helpful indeed. All the best for 2021 👍🏻

Thanks for the comment. Happy New Year.

Thanks for the comment. Happy New Year.

Thanks for the comment. Happy New Year.

Thank you so much for the feedback and your kind words. Happy New Year.

Agree, having the pcb / electronics lower down makes sense.

You can probably save quite some fuel by replacing it with a condensing boiler?

@@pizzablender That's what most people say, but I had a combi in another house and it was no more economical on the gas bills, at least nothing noticeable like the 30% savings they've tried to tell me

Thank you so much for all your help and support this year. Happy new year.

Thank you for your comment.

We are now seeing boilers been taken out that are already condensing. All about sales.

@@AllenHart999 You're old school like me, spot on Allen

Thanks for the tip!

If it's decent Stainless Steel as well Alan, you won't get any sparks, or very few. Looks like Carbon Steel to me.

The Viessmann doesn’t need a pump overrun. It can be installed with the permanent live linked to the S/L and when the pump kicks in the flow switch makes and the boiler fires. It doesn’t display a fault code and just appears to be in standby in the mean time. Odd one to get your head round but will get you out a tricky situation.

@@thomassmith7819 is this allowed by viessman. You can get a worcester ri to work on a 4 core but the pump stops dead when turn demand off. Voids the warranty.

Yes according to the Viessmann course I did a few weeks ago. Annoying I can’t find reference to it anywhere but I’m sure their technical dept can confirm. Happy new year all and thanks for the content Allen

Thanks for the comment. Happy New Year.

30 or 40 years !

Happy new year!

I used the magnet off camera and it stuck. Thanks for all your help and support last year. Happy New Year.

I will try. Next one i do. Thanks.

Thanks for the comment. Happy New Year.

Thanks for the comment. Happy New Year.

Sounds great!

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@@AllenHart999 Keep up the great work on this channel and the fb page. Happy New Year to you and your loved ones.

@@jassinghIG45 Thank You so much for all your support. I am amazed that people actually watch my videos. Thanks again.

@@AllenHart999 you’ve improved vastly over the years and your new content helps a lot of people, including the veterans whether they want to admit that or not. Always new ways of diagnosing, trade old techniques etc. You do good for the community, the trade, us as engineers to set the bar high again not keep selling ourselves short. I will support anyone that has a good heart and is genuine. Looking forward to more content!

@@jassinghIG45 I want this channel to be a community that helps and supports gas engineers, Also shows end users to have the job done correctly. Building the channel will help ME ( about time ) also helps Gas Engineers and there business, Hopefully in turn i will also be able to raise money for charity. Thanks so much for the support.

Reg Cotterill Worcester?

Reg, I had same issue and it was down to pump being set too high. I've not needed to bleed a radiator in nearly two years now 😎🎉

@@AllenHart999 Veissman, I was so impressed with the way the WB1B performed. I looked at a lot of boiler reviews including a lot of yours and decided there was no reason to change.

@@darrencahill5159 I spent 18 months and nearly a £1000 trying to fix it. Ironically we did find the source of the air ingress when we stripped out the pipe work in the airing cupboard.

@@regcotterill7332 Thats more an installation issue than a boiler one. Thanks for the comment. Happy New Year.

Have you seen the Baxi 800 Heat? of any of the other Baxi Heat Only Boilers? What’s your opinion on them. Thanks.

@@AllenHart999 No I’ve not looked at any other new baxis because I normally just use viessmann boilers however I did look after a load of ideal heat only boilers, Which were okay but the typical issues, plastic sumps gas valve And aluminium heat engines deteriorating filling up the condense traps and even splitting at the very top which is a typical issue although ideal deny it !

What’s your opinion on them? Do you agree with my findings? Thanks.

@@AllenHart999 I agree with you on the pcb leave well alone but no option with the Baxi service! The viessmann boiler looks a dream to service i much prefer the the burner set-up. I believe the viessmann does not require pump run on depending on where u fit boiler? Thanks Allen

Totally agree. Happy New Year.

Thanks for the comment. Happy New Year.

Its in the middle. Thanks for the comment. Happy New Year.

I did that off-camera and it stuck. Thanks for the comment. Happy New Year.

Thank you so much for watching. Happy New Year.

You are very kind. Thank You.

The Board on the Baxi is crazy money. Baxi really need to work on that. in my view. Thanks.

Thank You honey

I prefer the Viessmann heat only over the Baxi. Thanks.

Atag have aluminium end panels and i have personally had one leak. Not a patch on the Viessmann heat in my opinion. Thanks for the comment. Happy New Year.

@@AllenHart999 Thanks for the video Allen. Aren't ATAG boilers a cheaper version of Worcester Bosch? But easier to repair and take apart, since it's all held together using a Allen key of one size.

Thank You. Happy New Year.

😂😂😂😂Thanks for the commets. Happy New Year.

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Thank You so much for the feedback. Happy New Year.

Fibre Washer.I don't follow your logic with why you'd prefer a S Steel heat exchanger. The only positive of an S Steel is longevity vs Aluminium. In terms of efficiency aluminium wins as you can achieve a complex casting with far greater surface area than S Steel and aluminium conducts heat more quickly and efficiently than SS does. Given the short life spans of all modern boilers the longevity issue is less crucial. My last aluminium heat exchanger was still going after 25 years, though it hadn't that long to go. What kills boilers is cost of repair and reluctance of engineers to attempt a repair. Its easier and sometimes cheaper to stick in a new one with a long guarantee. I've seen enough newish looking easy to fix boilers at the scrappers to know what goes on. On a fixed price repair, Worcester Bosch will leave you with an effectively renewed boiler for £300. Is that unfair competition when the parts alone might cost an engineer that much ? Hmmm..I have mixed feeling on fixed price repairs personally.

@@AllenHart999 Happy New Year Allen & Family❤️❤️

@@timhancock6626 Ah Tim, in your statement you’ve conceded to two things; the short life span of aluminium & how High spares prices lead to uneconomic boiler repairs. Mate, I agree with you, aluminium is much better at transferring heat than SS. However, the constant 24/7 operation on OT controls is detrimental to aluminium. Far better on short periods of operation. I’m a big fan of aluminium, I generally fit Vokera boilers & their budget boilers are excellent value for money. Fitted on simple On/Off controls, they give countless years of service, know what?? I’ve never, ever, replaced a Vokera boiler heat exchanger. I agree also, too many course cowboys & career change chancers, ripping out perfectly good boiler. These morons can’t fix boilers!!

@@TheDickPuller 25 years short ? How many combis get to 20 ? Not very many.

Stainless might be your choice, and it wouldn't be a bad choice, but then neither would the Baxi as aluminium is more efficient at heat transfer than stainless. You find just as many stainless heat exchangers get blocked as alloy ones corrode. It depends on water quality and effective corrosion inhibition. My last alloy heat exchanger never failed. I retired it at 25 years old on an Ideal Turbo 2 which I installed in 1993

@@timhancock6626 great advice .. the water is full of calcium in Portugal. My current LPG combi is over 16 years old . never a moments bother .. Roca Laura 30/30 F.More than I can say for the Roca RX 200 wireless room stat .. I have two of them and getting some instructions on how to PAIR my workshop RX 200 with my house receiver is getting nowhere . Maybe because I do not converse In Portuguese . my CH system has inhibitor and Roca Alloy radiators .

Happy New Year to you all. Thanks so much for all the feedback.

Thanks 👍

Thanks for the comment. Happy New Year.

Hi Robert. Thank you so much. Happy New Year.

I didn’t have one to do a video on unfortunately but Viessmann is the best heat only boiler on the UK market in my opinion. Thanks for the comment. Happy New Year.

Wait until the PCB goes on the Viessman. You have to buy a whole new control interface. And they do fail.

@@timhancock6626 They are only £160 though.

Thanks for the feedback, Happy new year.

@@AllenHart999 They have reduced the price by 50% since I last did one in that case.

Do they have the flue hood that cracks? I haven’t seen one. Thanks.

@@AllenHart999 ecoTec plus 48 and 64kw have the stainless steel heat exchangers

@@AllenHart999 i have not seen the flue hood crack, but this could be a fault to look out for.

All the Vaillant heat only have aluminium heat exchangers apart from the 38kW I believe. It's only their system and combi which are stainless throughout the range.

A lot of the Vaillants use a plastic flow/return manifold on the coiled heat exchangers. Had a few leak. Like the Viessmans, the main components are solid. Still not keen on their condense traps and pipes, but they are more disposable components (as long as you've got to the boiler before it's rusted through the chassis 😉).

No idea. I got mine for free off the rep. 😂😂😂😂

Yeah most of the time they are left out by the person who was last there

Thanks for the comment. Happy New Year.

Worcester RIs and Greenstar Junior combis are dreadful when fitted in kitchen cupboards. The cross member stops you getting to the lower boiler cover screws.

@@timhancock6626 yes at that shallow angle. Very annoying.

Oh, one other thing. Would a system boiler (as opposed to a heat-only replacement boiler) give me pressurised HW while retaining the current HW cylinder & solar water heating in Summer?

Ah, had missed Allen’s comment about spares costs at 6 minutes in!! Doh...

I am looking for a heat only boiler and come down to between Baxi 800 vs Viessmann. Our existing boiler is Glowworn Economy Plus 5OF and still in full working order apart from its a bit noisy due to scale on the exchanger. Main concern have is the maintenance costs and parts for new boiler.

Thank you so much. Happy new year.

I need to do a video on parts, lots of the parts for most boiler brands come from abroad

@@AllenHart999 thanks Allen I believe viesmann and valiant have parts supply in the UK/make boilers in the UK too.

What’s your opinion on Aluminium ? Thanks.

@@AllenHart999 Aluminium is sensitive to corrosion from the acidic condensate and secondly from contaminants in the closed circuit. Has got advantages like good thermal conductivity, but in my opinion stainless steel is better, because it’s stronger and resists corrosion.

@@serraios1989 Thank you for replying.

Kevin Cranfield Just quoted a logic today. Gave them two options actually. Viessmann and Ideal 👍 I will be installing more ideals this year because of your support 👍

That was my plan to turn you from the dark side. 😂 happy new year

@@AllenHart999 I’m very surprised that the ideal logic heat boiler is better than the viessmann boiler! That’s the first I’ve heard of that! The stainless steel wins over the aluminium any day

It was tongue and cheek because I work for ideal. Although your choice of heat exchanger IMO is wrong, again both has advantages over the other but for pure efficiency and heat transfer the aluminium is actually proven to be better, the only downfall is that it is soft metal and therefore is vulnerable to corrosion/ errosion and thermal shock.

I have heard the same, I do not know anything more than that at the moment though. Thanks.

Thanks for the comment. Happy New Year.

I appreciate it's always a hefty slug of money to find, but in real terms boilers are cheaper than they have ever been. Look at an Ideal I Mini combi from Wolseley merchants. They do boiler, flue and filter for about £600 plus vat. It's based on the excellent Ideal logic and should have a five year warranty. You have Labour on top of course, but nobody should mind doing you a quote based on a decent budget range boiler like that. Just an idea.

I was in the same boat last week, but actually if you get someone good like Allen this work isn't as expensive as you'd think.

Does that go yellow?

Enjoyed

Welcome

Thank You. Happy New Year.

Thanks for the comment. Happy New Year.

It fast cycles on heating? It could be a number of things but if the system is working fine for hot water demand, your CH circuit must be blocked or your diverter valves are defective or wired incorrectly is most likely causes

Depends on the version. You will need to look in the installation information. Thanks.

I did that off-camera and it sticks. Thanks for the feedback. Happy New Year.

Thank You for the feedback. Happy New Year.

The fan is £186 including VAT viessmanndirect.co.uk/Catalogue/Spares/Vitodens/Vitodens-100-WB1B/Radial-Fan-NRG-118E-CVI-7833759

@@AllenHart999 My mistake; I found the NRG-118E fan with the list price of @ 205E - and from that supplier I can get it at 10-20% discount..

@@mihaiachim5299 All about gas are even cheaper than the price i listed.

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@@AllenHart999 hi Allen can you help with my running tap?

Happy new year. Thanks.

Its worse than that. Manufacturers can install plastic gas carrying parts inside boilers ( e.g. Worcester Bosch)...but you try it outside and you are for the high jump. There is sometimes no logic to the rules.

Less earthing issues. Weight consideration. Plastic gas carrying parts have proved very reliable when located in areas not likely to be subject to mechanical damage or sunlight.

@@darrencahill5159 There have been regular fatigue failures in Worcester Bosch plastic gas carrying elbows. It's a "must check" when servicing them. You didn't mention heat damage. That does happen inside a boiler, for obvious reasons.

@@timhancock6626 Tim, I'm not agreeing or disagreeing with the use of these parts. Failure of Worcester flexible gas pipes hasn't resulted in incidents as far as I know. Otherwise there would be an urgent remedial work programme. The Worcesters, as you know, have zero governor gas valves. So any significant failure in gas line after valve or restrictions in flueway or fan/ignition problems, will cause an ignition fault, closing the gas valve. These boilers are negative pressure, so any leaking gas would be sucked back into combustion train. Under atmospheric pressure, as long as case has been sealed correctly; any gas discharged into case from passing gas valve would be discharged to outside air. The risks are minimal from using these parts in their current application.

@@darrencahill5159 I think the failure rate of plastic components on Worcester Bosch boilers in general is hardly confidence building. Also, how many ideal Logic sumps have failed ? At least Ideal acknowledged the fault and modified the component. I've never seen similar from WB. The gas carrying parts crack across the corner of the elbow. They can certainly leak and they don't shutdown as you claim otherwise they wouold be discovered before a routine service, which is where they crop up on boilers ten years old or more from time to time. Having gas anywhere it shouldn't be is a significant risk I would suggest. Try your argument on your next friendly Gas Safe inspection...then stand well back 😉

Thank you! Cheers!

Thanks for the comment. Happy New Year.

👍👍👍

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