Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@.

Search
  • FIRST POST
    • ArdillaRoja
    • By ArdillaRoja 7th Mar 18, 1:54 PM
    • 2Posts
    • 0Thanks
    ArdillaRoja
    Replacing system with combi boiler
    • #1
    • 7th Mar 18, 1:54 PM
    Replacing system with combi boiler 7th Mar 18 at 1:54 PM
    Hi,

    We got a house late last year, 3 bedroom/1 bath, just my wife and I living there. We're novices to home renovation and we're having a new bathroom fitted from a high street store (existing one is dated and leaking).

    The contractor they've given the installation job to came round to scout out the situation and advised us we should upgrade our existing boiler to a combi boiler before the bathroom is fitted to support the new shower and it'd probably be wise to replace radiators with modern double ones and thermostatic valves while he's at it.

    Our existing shower uses hot water from the tank with a pump and it's pretty awful, if the immersion heater is not on the hot water will run out within 10 minutes and whoever's next needs to leave it for a while to build up again. So when he says the new shower will empty our hot water tank too quickly I'm inclined to believe him. He also said that there's a risk of getting air into the tank when the pump empties it which is bad for the system, no idea if that's true.

    The quote I received from the plumber was:

    Price inc. all materials and new Boiler 5780
    Breakdown:
    1. Change of system of heating Combi Boiler Vaillant eco Tec plus 838 1500
    2. 6 double radiator and thermostatic valve 680
    3. Power flushing 480
    4. Gas safety certificate 80
    5. Wireless thermostatic and install 420
    6. Materials (copper pipes,valves,magnaclean,condensing pipe etc) 410
    7. Labour 1940
    8. Remove Rubbish 270

    My father-in-law spoke to his trusted family plumber and had 3 concerns:
    1. Don't put combi boiler in a house, they're for flats
    2. You don't need a powerflush, you're changing the radiators
    3. Plumbers don't charge to remove the rubbish, they get money back for the scrap

    So I'm pretty confused. After doing some research it doesn't sound unusual to put combi boiler in a 1-2 bath house and the one quoted looks like a good one. But we don't know what we're doing, we're at the end of our budget and don't want to be taken for a ride.

    So we'd be really grateful for an independent take on this from the wisdom of the MSE crowd

    Is a combi boiler appropriate for us or what other options could we explore to support the shower throughput?

    Does the quote seem reasonable?
Page 1
    • boliston
    • By boliston 7th Mar 18, 1:59 PM
    • 2,643 Posts
    • 2,185 Thanks
    boliston
    • #2
    • 7th Mar 18, 1:59 PM
    • #2
    • 7th Mar 18, 1:59 PM
    sounds like you just need a bigger immersion tank
    • glentoran99
    • By glentoran99 7th Mar 18, 2:01 PM
    • 5,337 Posts
    • 4,519 Thanks
    glentoran99
    • #3
    • 7th Mar 18, 2:01 PM
    • #3
    • 7th Mar 18, 2:01 PM
    If you've a combi boiler why would you need a tank? Surely the combi bolier heats the water as needed?
    • ArdillaRoja
    • By ArdillaRoja 7th Mar 18, 2:07 PM
    • 2 Posts
    • 0 Thanks
    ArdillaRoja
    • #4
    • 7th Mar 18, 2:07 PM
    • #4
    • 7th Mar 18, 2:07 PM
    If you've a combi boiler why would you need a tank? Surely the combi bolier heats the water as needed?
    Originally posted by glentoran99
    We've got a normal boiler, he's suggested we replace that with a combi boiler, get rid of the tank in loft and the hot water tank in airing cupboard. Said it'll save us money on bills and we'd be able to control it with Hive. So some positives as well but just wondering it it's overkill or there are major downsides to having the combi boiler instead of our standard system. (And also whether he's overcharging for the job)
    • glentoran99
    • By glentoran99 7th Mar 18, 2:45 PM
    • 5,337 Posts
    • 4,519 Thanks
    glentoran99
    • #5
    • 7th Mar 18, 2:45 PM
    • #5
    • 7th Mar 18, 2:45 PM
    We've got a normal boiler, he's suggested we replace that with a combi boiler, get rid of the tank in loft and the hot water tank in airing cupboard. Said it'll save us money on bills and we'd be able to control it with Hive. So some positives as well but just wondering it it's overkill or there are major downsides to having the combi boiler instead of our standard system. (And also whether he's overcharging for the job)
    Originally posted by ArdillaRoja
    apologies, I misunderstood


    We switched from oil to combi last year in 3 bedroom house, its perfect for our needs.


    Ours was 2780 to switch from oil to combi and move a radiator to another wall.


    but that was keeping existing radiators but added theromostatic valves to the ones that needed them (4 I think)


    You don't need a flush if your changing radiators
    Last edited by glentoran99; 07-03-2018 at 2:48 PM.
    • Tom99
    • By Tom99 7th Mar 18, 2:52 PM
    • 2,244 Posts
    • 1,522 Thanks
    Tom99
    • #6
    • 7th Mar 18, 2:52 PM
    • #6
    • 7th Mar 18, 2:52 PM
    Sounds expensive, I would get a couple more quotes.
    Some of the labour costs seem to be doubled up, for example a wireless stat will cost about 120 so the 420 quote has 300 added to 'install', then a separate 1,940 is added as 'labour'
    • ukjoel
    • By ukjoel 7th Mar 18, 8:37 PM
    • 1,410 Posts
    • 1,269 Thanks
    ukjoel
    • #7
    • 7th Mar 18, 8:37 PM
    • #7
    • 7th Mar 18, 8:37 PM
    If you replace the radiators with double ones will they be half the size?
    If so you will need to redecorate.

    Our bedroom ones are singles and are twice the size of any of the modern doubles but are slim and no point replacing as it will knock out the same heat.

    I could be wrong but if you have a combi and only one shower why is he fitting an 838 which is a storage boiler with a built in second storage tank. Maybe if you had two bathrooms but you only have one.

    Cant help wondering if contractor is only taking on the installation jobs so he can flog you additional work.

    Also a bit surprised they have a gasfit engineer doing bathroom installs for a local bathroom shed. Is he doing the work himself or is he on commission to get someone else in to do it?
    • boliston
    • By boliston 7th Mar 18, 9:20 PM
    • 2,643 Posts
    • 2,185 Thanks
    boliston
    • #8
    • 7th Mar 18, 9:20 PM
    • #8
    • 7th Mar 18, 9:20 PM
    apologies, I misunderstood

    We switched from oil to combi last year in 3 bedroom house, its perfect for our needs.

    Ours was 2780 to switch from oil to combi and move a radiator to another wall.......
    Originally posted by glentoran99
    "oil" is a fuel source and "combi" is a bolier type - you can have any fuel type (oil/gas/electric) with any bolier type (system/combi) - the only real difference with a combi is the water is heated as it is used rather than preheated and stored in a hot tank
    • glentoran99
    • By glentoran99 8th Mar 18, 8:07 PM
    • 5,337 Posts
    • 4,519 Thanks
    glentoran99
    • #9
    • 8th Mar 18, 8:07 PM
    • #9
    • 8th Mar 18, 8:07 PM
    "oil" is a fuel source and "combi" is a bolier type - you can have any fuel type (oil/gas/electric) with any bolier type (system/combi) - the only real difference with a combi is the water is heated as it is used rather than preheated and stored in a hot tank
    Originally posted by boliston
    My bad, only ever heard of combi boiler in relation to gas
    • southcoastrgi
    • By southcoastrgi 8th Mar 18, 11:56 PM
    • 5,354 Posts
    • 3,110 Thanks
    southcoastrgi
    Ridiculous boiler choice, way over kill for your needs
    How old are your rads ?
    I'm only here while I wait for Corrie to start.

    You get no BS from me & if I think you are wrong I WILL tell you.
Welcome to our new Forum!

Our aim is to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

3,144Posts Today

7,961Users online

Martin's Twitter
  • RT @LaraLewington: ...and mine suggested I'd achieved a lifelong ambition of being sawn in half by a magician - at our wedding. Wasn't. Don?

  • We are working on it - I think BA has behaved awfully on this. Those flight were no obviously a glitch. It should? https://t.co/8pvtXtUEqi

  • RT @thenicolabryant: Absolutely. We need mental health and financial health as advocated my @MartinSLewis , to be taught in schools. So muc?

  • Follow Martin