Information on manifolds (central heating)

Discussion in 'Plumbing and Central Heating' started by Jibbs, 14 Jul 2012.

  1. Jibbs

    Jibbs

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    Hello all

    My friend is having an extension in a couple of months time and this will consist of 8 new rooms (both upstairs and downstairs). He currently has a combi boiler located downstairs and a manifold located upstairs that supplies the current radiators in the house. The current manifold has not got anymore available slots so how will he be able to accomadate the new additional 8 radiators? Sorry if this sounds like a stupid question but i'm still learning and reading up on plumbing.

    Jibbs
     
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  3. hammerswinger

    hammerswinger

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    The 22mm pipes that supply the manifolds will be extended and new manifolds will be fitted, that's if the new rads are going to be fed via manifolds.

    A more pressing concern, is the boiler capable of supplying the extra load of the new rads!


    Cheers.
     
  4. doitall

    doitall

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    I would say, new boiler, larger pipes and at least 1 addition zone.
     
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  5. flameport

    flameport

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    The simple answer is add another manifold.
    However in reality that won't be the solution at all, because is the existing boiler suitable for supplying another 8 rooms? What about pipe sizes, pump size etc. Is a combi really the best solution for such a large property?
     
  6. Jibbs

    Jibbs

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    I do believe the boiler he had before was a 28kilowatt. Now i think it's a 32kilowatt. The current pipe sizes are 22mm running into the manifold with 10mm flow and return pipes. So you're saying buy a completely new manifold or use another one with the existing manifold?
     
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  8. Jibbs

    Jibbs

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    As well as above ^^^^

    Can anyone direct me to some good reading material on this as when i google the subject, i get bombared with manifold sale items and information on underfloor heating.

    Jibbs
     
  9. flameport

    flameport

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    The things you need to be considering and reading up on are the heat loss for the rooms & house as a whole, from which you will know what sizes of radiator are required for each room, and therefore the sizes of pipes supplying those radiators, the size of the pipes to the mnanifold(s) and the size of boiler(s) required.
     
  10. gasanstuff

    gasanstuff

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    read part L of building regs.

    should cover seperate zone required due to building improvements etc
     
  11. mickyg

    mickyg

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    is your friend expecting you to know what your doing? :)
     
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