Replacing my Thorn M56/76 boiler.

[RayGreen]

Hi all,

Mainly because of Gas prices, I'm thinking or replacing our boiler, which I think is about 30 years old. On looking at a few adds, I see that many boilers are over 90% efficient. I'm lead to believe that my old boiler is about 60%.

1.Does that mean that a new boiler would give me a 1/3 more heat for the same amount of gas used?

2.Can anyone recommend a boiler with an output of 21.10 kW/72000 Btu/h?

 

[Deleted member 105431]

a more efficent boiler will deliver the same heat output using 33% less gas. therefore your bill should drop by approx a third. Personally I think you can't go wrong with the vaillants and if you want something a little cheaper the gow worms aren't bad either.

 

[RayGreen]

Thaks Dangermouse

 

[namsag]

Bet you don`t save 33% although this is what the figures lead you to believe it does not work out like that.
The main benefit you will find over your old M series boiler is most condensing boilers are low water content and the heat up on them is far quicker than your old lump of cast iron.
So the rads will heat up quicker the house will therefore get hot quicker and the boiler will shut off quicker .
How long it will take you to recoup the probable £2000 plus install cost is another question

 

[gremlin16]

How long it will take you to recoup the probable £2000 plus install cost is another question

Some has same opinion an me

 

[RayGreen]

So would I be wise to stay with my old boiler?

 

[namsag]

If you are doing it from a purely as a financial point then i would say stick with what you have, but the downside of that is your boiler is very old and will need changing within the next few years so prices will probably rise . Unless with the amount of site plumbers getting laid off it will drive prices down.

If its being changed to give you more control and better comfort levels within your home i would say go for it just now. Also heatexchangers for Mseries are probably not avialable anymore so if this was to fail in winter you would be cold for a few weeks.
Just trying to give you a balanced opinion without knowing your financial circs

 

[RayGreen]

Thank you very much namsag

 

[doitall]

Replacing reliability for efficiency

Go on any forum in the country and there's hundreds of nearly new boilers wanting major surgery, ok most will be Baxi 105, Why !!!! and how are they allowed to get away with it.

 

[namsag]

Disagree with you there DIA you get as many faults on this site regards vaillant and worcester and as the 105 must outsell any other combi out there 15 fold then faults would show up more than other boilers .
I bet the percentage rate of failure is far less, and when they do break down they are seldom more than a simple diagnosis and cheaper to fix than any worcester or vaillant

 

[doitall]

Fair enough namsag, so they're all unreliable rubbish.

Name me one modern boiler that I could leave working, go on holiday, and confidently expect it to still be working when I got back.

 

[Deleted member 105431]

I disagree namsag, the 105 is crap and not a patch on the vaillants (or glow worm for that matter). the 105 may have sold well but that's coz it was cheap. I think you'll find the vaillant group sell far more units per year than the POXI group. . . .(with a lower failure rate too)

 

[namsag]

Agree with you DIA. You cant beat the old boilers.
Dangermouse your talking nonsence the figures where put on here several months ago by baxi guys and vaillant UK comes knowhere near. And in what way is the vaillant far superior . Does it give more heat NO does it give a better water delivery NO . Is it a better build quality not really. Do they live on the back of the old sine 18 and 242e YES.
At one time i would fit nothing but vaillants but they went down hill from turbomax . Emperors new clothes you all believe the publicity till you actually look properly at them you will realise they are not market leaders anymore
And if you where actual BG you will know how unreliable the own badge worcesters are.

 

[Gasguru]

Too true namsag...all Worcesters after the 230 are carp (except the 24/28iRSF if the waters ok), most Vaillants after the Turbomax are full of design faults. Manufacturers trading on previous quality boilers.

I'd have a Band B Biasi over anything from Worcester or Vaillant.

Look at Bosch nowdays....fridge/freeezer I fitted the other day....half the bits from Malaysia. Bosch hobs...gas taps and burners from SABAF (Italy) and assembled in Spain. Their full injection stuff is no better.

 

[RayGreen]

I'm losing the plot here guys!!!