Back Boilers.....adding to systems

Discussion in 'UK DIY' started by RW, Aug 3, 2008.

  1. RW

    RW Guest

    Hi all,

    We have a solid fuel fire with a door on the front in our cottage which does
    not do anything more than throw out lovely heat and roast Chestnuts in the
    winter when we fancy lighting it. At the rear is a back boiler not doing
    anything at all. Not plumbed in to anything. The unit has a "draught"
    adjuster to enable the burn to be regulated quite finely. It all came from a
    cottage of a similar size as ours and ran DHW and Heating.

    Now, as a good friend is an aboriculturalist and can supply more logs than
    you want to shake a stick at, we *could* use the heat generated to
    supplement the existing gas combi-boiler heating system.

    At the mo' 6 rooms, approx 11ft square by 7ft 6 tall. Expect the bathroom
    which is only 8ft square.

    Could I actually add supplementary rad's in positions (Such as under the
    windows) to improve the heat situation as at the rate fuel prices are rising
    I would rather burn free logs and distribute the ash over the garden. ?

    Or would it be adaptable to add it into the existing circuit ?

    Clean air act etc etc notwithstanding ;-)
    RW, Aug 3, 2008
    #1
  2. RW

    robgraham Guest

    On 3 Aug, 09:07, "RW" <> wrote:
    > Hi all,
    >
    > We have a solid fuel fire with a door on the front in our cottage which does
    > not do anything more than throw out lovely heat and roast Chestnuts in the
    > winter when we fancy lighting it. At the rear is a back boiler not doing
    > anything at all. Not plumbed in to anything. The unit has a "draught"
    > adjuster to enable the burn to be regulated quite finely. It all came from a
    > cottage of a similar size as ours and ran DHW and Heating.
    >
    > Now, as a good friend is an aboriculturalist and can supply more logs than
    > you want to shake a stick at, we *could* use the heat generated to
    > supplement the existing gas combi-boiler heating system.
    >
    > At the mo' 6 rooms, approx 11ft square by 7ft 6 tall. Expect the bathroom
    > which is only 8ft square.
    >
    > Could I actually add supplementary rad's in positions (Such as under the
    > windows) to improve the heat situation as at the rate fuel prices are rising
    > I would rather burn free logs and distribute the ash over the garden. ?
    >
    > Or would it be adaptable to add it into the existing circuit ?
    >
    > Clean air act etc etc notwithstanding  ;-)


    You have asked about two options, neither of which I fear are
    possible, but no doubt there will be someone along to say I'm wrong.

    You have to be aware from the beginning that any hot water feed from a
    solid fuel source should be a gravity feed so that in the event of a
    power failure, the heat source can continue to dump heat into a
    reservoir, be that a tank or radiator in an upper room.

    And there you will see the answer really to your two options - you
    need a DHW tank (either a normal DHW tank or thermal bank/store) which
    you won't have because you got rid of it in favour of a combi. And
    then you ask about supplying radiators within the room - that could be
    done with a seperate circuit from your CH system as it will have to
    have the gravity dump somewhere upstairs.

    Rob
    robgraham, Aug 3, 2008
    #2
  3. RW

    RW Guest

    "robgraham" <> wrote in message
    news:...
    On 3 Aug, 09:07, "RW" <> wrote:
    > Hi all,
    >
    > We have a solid fuel fire with a door on the front in our cottage which
    > does
    > not do anything more than throw out lovely heat and roast Chestnuts in the
    > winter when we fancy lighting it. At the rear is a back boiler not doing
    > anything at all. Not plumbed in to anything. The unit has a "draught"
    > adjuster to enable the burn to be regulated quite finely. It all came from
    > a
    > cottage of a similar size as ours and ran DHW and Heating.
    >
    > Now, as a good friend is an aboriculturalist and can supply more logs than
    > you want to shake a stick at, we *could* use the heat generated to
    > supplement the existing gas combi-boiler heating system.
    >
    > At the mo' 6 rooms, approx 11ft square by 7ft 6 tall. Expect the bathroom
    > which is only 8ft square.
    >
    > Could I actually add supplementary rad's in positions (Such as under the
    > windows) to improve the heat situation as at the rate fuel prices are
    > rising
    > I would rather burn free logs and distribute the ash over the garden. ?
    >
    > Or would it be adaptable to add it into the existing circuit ?
    >
    > Clean air act etc etc notwithstanding ;-)


    You have asked about two options, neither of which I fear are
    possible, but no doubt there will be someone along to say I'm wrong.

    You have to be aware from the beginning that any hot water feed from a
    solid fuel source should be a gravity feed so that in the event of a
    power failure, the heat source can continue to dump heat into a
    reservoir, be that a tank or radiator in an upper room.

    And there you will see the answer really to your two options - you
    need a DHW tank (either a normal DHW tank or thermal bank/store) which
    you won't have because you got rid of it in favour of a combi.


    No I didn't. The existing combi set up was here before we moced in.


    And
    then you ask about supplying radiators within the room - that could be
    done with a seperate circuit from your CH system as it will have to
    have the gravity dump somewhere upstairs.

    The roof is an option for the required tanks.
    RW, Aug 3, 2008
    #3
  4. RW

    RW Guest

    "Owain" <> wrote in message
    news:...
    > RW wrote:
    >> We have a solid fuel fire with a door on the front in our cottage which
    >> does not do anything more than throw out lovely heat and roast Chestnuts
    >> in the winter when we fancy lighting it. At the rear is a back boiler not
    >> doing anything at all. Not plumbed in to anything....
    > > we *could* use the heat generated to
    >> supplement the existing gas combi-boiler heating system.
    >> Or would it be adaptable to add it into the existing circuit ?

    >
    > Dunsley Neutraliser
    > http://www.dunsleyheat.co.uk/linkupsys.htm


    Thanks Owain

    But according to them "Please Note: The Neutralizer will not work on a
    sealed central heating system."

    Am I correct in stating that a combi is a sealed system ?
    RW, Aug 3, 2008
    #4
  5. RW

    robgraham Guest

    On 3 Aug, 18:09, Owain <> wrote:
    > RW wrote:
    > > We have a solid fuel fire with a door on the front in our cottage whichdoes
    > > not do anything more than throw out lovely heat and roast Chestnuts in the
    > > winter when we fancy lighting it. At the rear is a back boiler not doing
    > > anything at all. Not plumbed in to anything....

    >
    >  >  we *could* use the heat generated to
    >
    > > supplement the existing gas combi-boiler heating system.
    > > Or would it be adaptable to add it into the existing circuit ?

    >
    > Dunsley Neutraliserhttp://www.dunsleyheat.co.uk/linkupsys.htm
    >
    > Owain


    Yes I've got one of those with a normal DHW tank and an oil boiler.
    The wood burner has a differential thermostat on it that switches off
    the oil burner when the stove is hot.
    Rob
    robgraham, Aug 3, 2008
    #5
  6. RW

    Andy Dingley Guest

    On 3 Aug, 17:11, robgraham <> wrote:

    > You have to be aware from the beginning that any hot water feed from a
    > solid fuel source should be a gravity feed so that in the event of a
    > power failure, the heat source can continue to dump heat into a
    > reservoir, be that a tank or radiator in an upper room.


    It doesn't have to be. There has to be a gravity circuit to act as a
    heat dump (small radiator upstairs with the valves always open) but
    there's no reason why the main heat circuit (i.e. a coil in a thermal
    store) can't be pumped instead. Obviously you lose heating after power
    failure, but this is sufficient to cope with the real need: that of
    dumping residual heat.
    Andy Dingley, Aug 3, 2008
    #6

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