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    tired dad
    new boiler: open vent or system boiler
    • #1
    • 12th Feb 12, 10:12 AM
    new boiler: open vent or system boiler 12th Feb 12 at 10:12 AM
    Appreciate some advice here.

    Currently have a conventional gravity fed system with floor standing thorn emi conventional boiler (open vented). Looking to upgrade the system to a modern set up.

    Its a large house and so a combi is out. Will be using a water cylinder (current one is big enough).

    I don't really understand the system boiler vs open vented option.

    As far as I can see the only advantage is the loss of an expansion tank in the loft. We have no intention of building in our loft.

    Are there any other issues I should understand?

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