Upgrade boiler or install unvented cylinder

Discussion in 'Plumbing and Central Heating' started by Jthomas, 2 Mar 2016.

  1. Jthomas

    Jthomas

    Joined:
    19 Oct 2010
    Messages:
    15
    Thanks Received:
    0
    Location:
    Belfast
    Country:
    United Kingdom
    We've recently had a biggish extension added to the house and now have 4 bed with 3 bathrooms. The current (not so old) combi will struggle with the extra demand so was contemplating getting an unvented cylinder to supply the bathrooms but having perused various sites I'm in at least 2 minds on this.

    I'm wondering if a storage combi would be better

    Any advice? What's the relative cost of adding a cylinder compared to upgrading the boiler?

    thanks

    JT
     
  2. Aquaheat

    Aquaheat

    Joined:
    19 Nov 2007
    Messages:
    3,088
    Thanks Received:
    591
    Location:
    Lincolnshire
    Country:
    United Kingdom
    Firstly you need to know your flow rate and pressure.

    A combi boiler in that situation is a definite no no.

    Depends on the size of the runs but consider an unvented with a secondary return. Best of both worlds then. Mains hot water and pretty much instant from all hot water outlets.

    Cant really put a price on it as there's too many variables but you would never be satisfied running 3 bathrooms a kitchen, other appliances from a combi.

    Jon
     
  3. Sponsored Links
  4. polesapart

    polesapart

    Joined:
    27 May 2011
    Messages:
    1,390
    Thanks Received:
    365
    Country:
    United Kingdom
    Unvented. Will require min 22mm supply.

    You could leave one or two draw-offs on the existing combi, which is likely to have the spare capacity for the additional heating load.

    Your G3 qualified installer can advise.
     
  5. Jthomas

    Jthomas

    Joined:
    19 Oct 2010
    Messages:
    15
    Thanks Received:
    0
    Location:
    Belfast
    Country:
    United Kingdom
    Thanks - seems like the unvented cylinder may be the way to go, the plumber we're using has recommended it, he's planning on leaving one draw-off on existing combi.
     
  6. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
  7. Sponsored Links
Loading...

Share This Page