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steptoe

Combi Boiler

23 posts in this topic

so, I need a new combi, my boiler has been on the way out for a couple of years now, and its finally on its knees,

funny noises and continually locking out,

I have a main combi24 at the minute, does anyone have any thoughts on these ? there is also a 24 version, but for £50,,,,,,,

apparently they are made by vaillant, and as far as I can find its all good reviews on them,

BTW, I have an electric shower if thats of concern.

 

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ID: 2   Posted (edited)

Personally I would NEVER have a combi boiler.

 

WHY do you want a combi?

 

I would go for a conventional boiler with either a mains pressurised hot water tank, or a heat store tank.

 

Either will give you mains pressure hot water at a MUCH greater flow rate than any combi.

 

I would only consider a combi boiler if nobody in your house EVER takes a bath.

 

If I get the chance to build another house, I will use a heat store system, so much easier to combine multiple heat sources e.g woodburner, solar thermal and a conventional boiler.

 

Just my thoughts.

Edited by ProDave
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Combi already fitted Dave, I would say 3 baths whole of last year, and little one even prefers a shower now.

Electric shower BTW.

Local wholesaler has Biasi 28kw for 430 +vat.

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From my experience you are better to pay for a quality make as these are more efficient. There is a Sime combi boiler in our house and I have to say it is rubbish yet the equivalent Baxi, Valliant, Bosch are much better. However I'm not buying a new one, so over to you.

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From my experience you are better to pay for a quality make as these are more efficient. There is a Sime combi boiler in our house and I have to say it is rubbish yet the equivalent Baxi, Valliant, Bosch are much better. However I'm not buying a new one, so over to you.

I know from experience that the Worcester Bosch service team are excellent,,, they usually come out within the next working half day and they have a van full of bits so it would be very rare for them to not be able to fix it there and then.

E.g. An elderly customer had a fault,,, they thought that it was the timeclock or room stat so called me, I found that it was actually a boiler fault and phoned the service team (11:50) they said that their guy would be there that afternoon. True to their word he came and fixed it straight away.... No nipping off to get bits as he had a fully stocked van!

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IF, I had the money Noz it would be a Worcester, but, at short notice like this its what cash is available.

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IF, I had the money Noz it would be a Worcester, but, at short notice like this its what cash is available.

Totally understand mate...

I've been told that Gloworm are OK

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arent gloworm rebadged baxi ? or is it biasi?

anyway, looking around a bit more doesnt seem that biasi get many positive comments, bit of a mixed bag from what I can find,

its just going to have to be something cheap and see how many years I get out of it and hopefully some spare cash by then.

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ID: 10   Posted (edited)

Just dont buy a Ferrolli.... pile of garbage if you ask me.

 

I bought a Ravenheat Condensing Combi from B&Q 7 years ago, there was 10% off and it was a bank holiday so another offer meant another 20% off. Ended up buying it for about £400 which seemed like a bargain. Never had it serviced since all they do is take the cover off, brush the dust out, check water pressure and charge you £100 and its never missed a beat....... that is until Scottish Power decided to blow the control boards up with their antics. Just had new boards fitted at a cost of £300 plus the call outs which probably means the repair cost more than the boiler(SP paid anyway). can't fault it really for the price.

 

Had a ravenheat about 25 years ago when combis were relatively new and had no bother with that either.

 

But who's heard of Ravenheat?

Edited by revjames
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Ive in the past done loads of ravenheat oil burners, not seen a gas one yet though,

new turn up, discovered the wife has had the stat at max this past week! why?  :shakehead

anyway turned it back down to its usual 20 and everything [touch wood ] seems ok, apart from the noise coming from the boiler, which has been going an a while now, and just the occasional lock out,

might, just might, give me enough time to get a couple of more quid together for something decent, hopefully,

googling, the fault can be a few things, flame sensor faulty, condenser blocked/full, ignitor bad, or, which Im hoping for, overheat on the boiler - which might make sense if stat is up full and the TRVs are all off,

only rad without TRV is small 600mmX400mm , still, the noise continues so its time to seriously think about a replacement,

and about time I fitted this prog-stat I got sent, then she cant mess with it anymore,!  X(

I'll update tomorrow on the situation,

thanks for all the input,

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ID: 13   Posted (edited)

Don't like to worry you, but I've been reading a lot about boilers on another forum and the consensus seems to be that condensing boilers are nowhere near as reliable as conventional boilers.  Problems with the metalwork of certain bits corroding and boilers being scrap after 7 years or less.

 

Opinion seems to be avoid a condensing boiler if you can.  Yes it will be less efficient, but not if you have to get a new boiler every 7 years.

 

Apparently you CAN still fit a conventional boiler if there's a good reason not to fit a condenser.  No access to an external wall for the condensate drain is the most plausible.

 

I would be very interested to hear from those that fit and service boilers regularly to hear if this is true, or just internet BS. Also if true, do the same issue also apply to oil fired condensing boilers?

Edited by ProDave
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Do they not suggest you have a magnaflow thingy to prevent corrosion. Next time I get my boiler serviced I think I may get one fitted.

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Ok, we have now calculated a budget of £700, 800 totally max, so should get something a bit better,

Ah, condensate, therein lies another problem, existing boiler simply has a pipe through the wall, it doesnt actually go into a drain anywhere!

Will need to investigate this some more, thanks for the heads up Dave, will speak to plumber at work tomorrow.

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Why don't you get BG out to fix it for their fixed fee repair,,, you might then get another couple of years out of it to save up for a better one.

 

BTW you can get pumps that allow you to pump the condensate up and over if you need to.

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ID: 17   Posted (edited)

condensate boiler just requires a 22mm waste pipe throught he wall into nearest drain.

 

Its only water :innocent

Edited by revjames
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Thanks rev, house is built on a raft, but the downspout drain is only about 3m away on the corner,

I thought maybe it hadtogo to a run off drain somewhere, I can sort that out then.

Have found a Ravenheat 85 for 500 :) and they seem good, just unknown, and 3year warranty. 

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as I said before steps, mine was the cheapest combi around, missus spent most of the budget on fancy acova rads that look like the old cast ones so cost was an issue. Its never let me down except when Scottish power blew it up. Am I right in thinking its a British product too?

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Don't like to worry you, but I've been reading a lot about boilers on another forum and the consensus seems to be that condensing boilers are nowhere near as reliable as conventional boilers.  Problems with the metalwork of certain bits corroding and boilers being scrap after 7 years or less.

 

Opinion seems to be avoid a condensing boiler if you can.  Yes it will be less efficient, but not if you have to get a new boiler every 7 years.

 

Apparently you CAN still fit a conventional boiler if there's a good reason not to fit a condenser.  No access to an external wall for the condensate drain is the most plausible.

 

I would be very interested to hear from those that fit and service boilers regularly to hear if this is true, or just internet BS. Also if true, do the same issue also apply to oil fired condensing boilers?

Don't think location would matter in terms of building regs, I have connected condensate pump units, fitted by heating company that have their own level sensor to activate and pump to anywhere.

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well, looks like Im going for a MAIN combi, halfway house I suppose,

done a stat for a gasman [that I do regular work for] tonight and asked him his thoughts, he said if money was that tight he would supply me a boiler [for what I could afford just now] and I could just work the remainder off to him, but in his opinion any of the boilers I was looking at were hit and miss as to quality and reliability, he recommended a MAIN for what I have for a budget.

he is to get back to me tomorrow with a price, but looks like he can get me a main [inc] for the price I can get it [plus] , which would put it into my budget, and still give me enough for a magnaclean,

he reckons that is a FAR better investment than a powerflush for a combi [only because its always been a combi system] ,

so, its some sludge cleaner in the system tomorrow for a few days (until I get the new one sorted) , then blow it through with the mains pressure using the filler loop, and fit the new boiler with some inhibitor.

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Combi boilers can be a tempremental but often run for years with out fault, the boiler you are looking at, Potterton / Baxi main isnt bad, has a great hot water flow, make sure the system is spotless, hire a flushing machine and do it yourself, its straight forward, get a filter fitted -http://www.screwfix.com/p/fernox-tf1-total-filter-22mm/84311 and you should be golden.

 

note, if you can spend a little more, go go for the Vaillant Ecotec Pro 28

 

HTH

 

Ste

 
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The condensate can go into a pit of lime if you don't have a drain nearby. I say lime it probably is something else. in fact can't remember what it is just remember they did this on a job on an outside boiler which was metres from the house. It was an oil boiler and they didn't want to smell the fumes.

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