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Thread: Boiler Replacement

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    HEXUS.social member Disturbedguy's Avatar
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    Boiler Replacement

    Hi all,

    So looking for some help / info / advice from those much more clued up in this area than I am. I will say I am getting second hand information so what I type, may not be technically true.

    My brother bought a house earlier this year, knowing a new boiler is required, although not urgently. He decided to get a quote for the cost of a boiler replacement, he went to British Gas to get his initial quote and will be going to others.

    British Gas came back with a price of £8200, apparently because of the type of system he has, a "single system" they can't use the pipes that are in place and they all need to be replaced. So my question is, what on earth do they mean with regards to the pipes being "single system"?

    Thanks in advance
    Quote Originally Posted by TAKTAK View Post
    It didn't fall off, it merely became insufficient at it's purpose and got a bit droopy...

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    Re: Boiler Replacement

    The major difference between a dual pipe and single pipe system is the way the radiators are drained of their cooler water after radiating its heat into the room.

    With a single pipe system, all radiators are fed from the same hot water feed, but the "cooler" water that comes out the other side of the radiator is fed back into the single pipe, slightly cooling the water for the next radiator. If you have a long enough system, the furthest radiators can be significantly cooler. This is also a very inefficient way of heating your home.

    A dual pipe system sends hot water to all of your radiators but the cooler water is fed back independently to the boiler so is more efficient.

    vs

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    HEXUS.social member Disturbedguy's Avatar
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    Re: Boiler Replacement

    Quote Originally Posted by Hoonigan View Post
    The major difference between a dual pipe and single pipe system is the way the radiators are drained of their cooler water after radiating its heat into the room.

    With a single pipe system, all radiators are fed from the same hot water feed, but the "cooler" water that comes out the other side of the radiator is fed back into the single pipe, slightly cooling the water for the next radiator. If you have a long enough system, the furthest radiators can be significantly cooler. This is also a very inefficient way of heating your home.

    A dual pipe system sends hot water to all of your radiators but the cooler water is fed back independently to the boiler so is more efficient.

    vs
    Ahh that explains it then.

    Next up is seeing if he can get any better quotes.
    Quote Originally Posted by TAKTAK View Post
    It didn't fall off, it merely became insufficient at it's purpose and got a bit droopy...

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    Re: Boiler Replacement

    Quote Originally Posted by Disturbedguy View Post
    Next up is seeing if he can get any better quotes.
    Be sure to check around for any government grants towards making your home more energy efficient, the installation of a new boiler or what have you.. It might just help knock a portion of the bill off.

    £8200 does sound expensive though, unless it's a large house. A friend of mine has just had a 3 storey terraced house have a heating system installed where one didn't already exist for about half of that.

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    Re: Boiler Replacement

    Quote Originally Posted by Disturbedguy View Post
    Ahh that explains it then.

    Next up is seeing if he can get any better quotes.
    In my experience with British Gas a bigger challenge would be trying to get a worse quote. It'd probably worth asking each supplier for 2 quotes, one as-is and another including conversion to a dual pipe system as they're far more efficient in the long run.

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    Re: Boiler Replacement

    Look online for GAS SAFE engineers in your area.
    Then check reviews and look for a long set of 4 and 5 stars. Then get a quote from someone who's not gonna rob you blind. BG as not interested in jobs like that, hence quoting enormous sums to cover any screw ups.

    If the pipes need changing then the floors are coming up and that means carpets, underlay etc.. huge job.

    Now...the size of the house makes a huge difference as to the importance of the "single " pipe system. If it's 4 rooms total, it's all fine, but all the rooms will be hot or not.

    The issue about the water cooling from one radiator to the next is a minor issue, as they all heat up prety quick. The MAJOR issue is that you cant turn one radiator down... cos then you turn them all down.

    It's like having light bulds in series, where if one blows, everything stops.... or in parallel... where one can go out and the others work.

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    Re: Boiler Replacement

    Quote Originally Posted by Zak33 View Post
    Look online for GAS SAFE engineers in your area.
    Then check reviews and look for a long set of 4 and 5 stars. Then get a quote from someone who's not gonna rob you blind. BG as not interested in jobs like that, hence quoting enormous sums to cover any screw ups.

    If the pipes need changing then the floors are coming up and that means carpets, underlay etc.. huge job.

    Now...the size of the house makes a huge difference as to the importance of the "single " pipe system. If it's 4 rooms total, it's all fine, but all the rooms will be hot or not.

    The issue about the water cooling from one radiator to the next is a minor issue, as they all heat up prety quick. The MAJOR issue is that you cant turn one radiator down... cos then you turn them all down.

    It's like having light bulds in series, where if one blows, everything stops.... or in parallel... where one can go out and the others work.
    Just to add - make sure they have 4 and 5 stars for big jobs like this one. I got the highest rated trader in the area on Trust a trader and he properly screwed the job up. Looked back - lots of little easy jobs.

    Secondly, as said before, forger british gas. Unbelievably expensive and NOT a premium service.
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    Re: Boiler Replacement

    Thanks for all the replies everyone.

    Zak33


    Now...the size of the house makes a huge difference as to the importance of the "single " pipe system. If it's 4 rooms total, it's all fine, but all the rooms will be hot or not.
    Only been in the house, once and didn't take note of the number of radiators.

    It's not a big house, but there are at least 4 radiators, 2 bedrooms, living room and a dining room, not really space in the kitchen for a radiator and fairly sure the bathroom (its a downstairs bathroom) is to small for a radiator.

    I'll recommend he shop around and see what he can find.
    Quote Originally Posted by TAKTAK View Post
    It didn't fall off, it merely became insufficient at it's purpose and got a bit droopy...

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    Re: Boiler Replacement

    Quote Originally Posted by Disturbedguy View Post
    fairly sure the bathroom (its a downstairs bathroom) is to small for a radiator.
    The bathroom should have a radiator if at all possible otherwise you can end up with terrible condensation problems. You can get some very clever towel-rail and low profile radiators for small rooms these days. Also, it's just nicer to have a warm bathroom.

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    Re: Boiler Replacement

    Quote Originally Posted by Hoonigan View Post
    The bathroom should have a radiator if at all possible otherwise you can end up with terrible condensation problems. You can get some very clever towel-rail and low profile radiators for small rooms these days. Also, it's just nicer to have a warm bathroom.
    condensation.. excellent point.

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    Re: Boiler Replacement

    As others have said, don't go with British Gas. Don't buy their boiler insurance either. They're a con.

    Get the boiler, then get local gas safe / plumber worth their salt to put it up. Don't bother withe ratedpeople/my builder... As some of them have their mates put in reviews for them.

    I paid 890 for mine, 300 to have it installed. 100 for a certificate on the work. Mine for like for like replacement with no plumbing required.
    Last edited by pp05; 30-10-2019 at 11:53 PM.

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    Re: Boiler Replacement

    As stated dont go with British Gas as most of the boilers they supply are crap or at least they were a good few years ago. Worcester Bosch, Vaillant & Viessmann are supposed to be the better brands.

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    Re: Boiler Replacement

    Quote Originally Posted by Hoonigan View Post
    The bathroom should have a radiator if at all possible otherwise you can end up with terrible condensation problems. You can get some very clever towel-rail and low profile radiators for small rooms these days. Also, it's just nicer to have a warm bathroom.
    I agree on that. We have a small bathroom, but have a substantial towel rail behind the door and a small slimline radiator alongside the loo. Cozy

    Main problem we have is radiator rust around the house, wherever we have draped towels or other wet gear. Feels like a process, rather than just cheap radiators.

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    Re: Boiler Replacement

    Quote Originally Posted by jimborae View Post
    As stated dont go with British Gas as most of the boilers they supply are crap or at least they were a good few years ago. Worcester Bosch, Vaillant & Viessmann are supposed to be the better brands.
    I got a quote from BG last year, simply because they offered a free quote, I had no idea how much things cost and my current boiler is 30 years old, with almost no replacement parts available. Pays to know how much it will cost if it suddenly breaks.

    Anyway, they quoted me for a Vaillant ecoTEC at £870, which was less than 1/3 of the total quote...

    What really irked me was that they wanted £199 for an electrician to connect some wires to it.

    I really doubt the huge cost is because the boiler needs a few extras, namely flue adjustments and a condensation drain fitting, as those particular things were extras.

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    Re: Boiler Replacement

    I recently had a Worcester Bosch fitted, linked to my nest thermo, had some pipe work redone due to it originally being installed 30 some years ago and being smaller diameter pipes.

    The difference is incredible, hoping to see some significant reductions in bills too.

    I'd definitely look at independent fitters, just make sure they are registered, think it used to be CORGI but is now Gas Safe. Trusted Traders , Which? rated people etc

    get a few quotes, tell British Gas where to stick their boiler and go with whomever cant fit you in for 3 months, they'll be decent
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    Re: Boiler Replacement

    Yea I am beginning to think that is the best way.

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