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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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    • CommentAuthorAmieB
    • CommentTimeAug 19th 2010
     
    We have just bought a property where the lovely, eco-minded previous owner had installed a Vigas 25s wood-fuelled gasification boiler and Akvaterm 1000 litre insulated accumulator tank. It was installed by Dunster Wood Boilers in Somerset and is, apparently, great. This wonderfully sustainable technology is, however, unsuitable for myself and my husband, for a number of reasons, and we will have to replace it with an oil boiler before we move in. We know this boiler and tank and accessories was £4000 new and is only 2 years old. We are open to sensible offers. You will have to come and pick it up!
    • CommentAuthorJTGreen
    • CommentTimeAug 19th 2010
     
    I'm thinking of getting a wood stove with back boiler and (slightly smaller) accumulator. Would you be willing to share why it is not suitable for you? (I don't want to put something in that I would be itching to rip out after two years). I understand that accumulators are suitable with a number of different heat sources, could it not be converted to run with your oil boiler?
    • CommentAuthorTerrier
    • CommentTimeAug 19th 2010
     
    Why not change the log boiler for a good quality wood pellet boiler, keeping the accumulator, this will be a easy install, and you will be able to qualify for the Renewable Heat Incentive next year, paying you about £1000 per year, you won't get that with oil !!

    Make sure you get an MCS registered boiler and an MCS installer.

    Terrier.
    • CommentAuthorjcsewart
    • CommentTimeAug 20th 2010
     
    Another thing to consider for flexibility as you have a solid Vigas boiler with a good accumulator tank.
    If you need a bit of switch on switch off you could have an immersion heater put in the tank itself.
    I did this with my Akvaterm accumulator tank linked with my Angus Super log boiler. You might be surprised how quickly you get the hang of it.....the accumulator tank can typically hold enough hot water for 3 or 4 days for your DHW and central heating requirements but any longer through the Autumn to Spring and you would need to have a plan B (immersion heater on a timer).
    Or you could have an oil boiler and use it as the back up when you go away and use the log boiler as your primary heat source?
    Just my thoughts for what is it worth....
    • CommentAuthorMartinH
    • CommentTimeAug 20th 2010
     
    Hi AmieB - the great advantage of thermal stores is that they can accept heat from different sources. Our store is heated by wood, and when necessary, oil. As mentioned in the previous contribution, a single firing of a Vigas boiler with one fuelling of wood can give you days of heat depending on the conditions. If an oil boiler is used to heat a thermal store, it runs continuosly and at high efficiency to bring the store up to temperature. In a conventional heating system, the boiler cuts in and out a lot - with more wear and tear and lower efficiency. I know oil is convenient, but it is finite resource which will get ever more expensive - and soon. I would get the best of both worlds and take advantage of the benefits of the thermal store. I have to admit that it pains me to hear of a green system being taken out and replaced with an oil fired system. The store can also accept heat from solar panels - which can therefore contribute to both water and space heating, and if the Renewable Heat Incentive comes in, you will be paid too! Keep the system and just add an oil boiler andsolar panels if you have the right aspect (and budget)
    • CommentAuthorAmieB
    • CommentTimeAug 22nd 2010
     
    Hi everyone, you've given me a lot to think about. I will investigate all the options.
    I'll tell you what my reservations are...especially for the benefit of JT Green, as you're thinking of getting one. Although, please bear in mind that I haven't actually lived with this system and am going on hearsay and the previous owner's experience.
    1. We need the space that the boiler is taking up. It is huge and if we remove it, I can use the outbuilding that it is housed in presently as a studio. I am an illustrator and have nowhere else in the house to work.
    2. We travel for long periods of time. A month and more...especially during the winter and we feel that we don't want to impose upon neighbours to come in and stoke up the boiler every once in a while to keep the pipes from freezing.
    3. There is no radio-controlled thermostat that works through the thick stone walls (it wasn't connected originally by wires to the house)...so the heating has to be on or off during the winter.
    4. The boiler is in an outbuilding which is directly behind a neighbour's house and the smoke from the flue very often, goes straight into her bedroom.

    As you see. It isn't the nature of a wood-fired boiler itself which is the problem but more this particular situation. We don't have anywhere else to put it and we really don't want to keep pumping smoke over our neighbours any more!
    Do the wood pellets create the same quantity/quality of smoke?
    Unfortunately we're North Facing so solar panels won't be practical and they have been rejected eslewhere in the village by the Parish Planning council. Sigh.
    I'm not sure we have the budget to keep both an oil boiler AND a wood-fuelled one. Not to mention the space!
    Thanks though, for all your help!
    Amie
    • CommentAuthorTerrier
    • CommentTimeAug 22nd 2010
     
    Hi Amie,

    Don't forget that potential £1000 per year!
    A good pellet boiler will be authorised for use in a smoke control area, so the smoke problem should not be an issue (although it may be that the flue is not terminated properly allowing the smoke to enter the bedroom) a pellet boiler is just as controllable as an oil boiler with automatic ignition auto cleaning, auto de-ashing etc. also with some boilers it is possible to control the boiler remotely by SMS message or computer to turn on from anywhere in the world !

    Terrier.
    • CommentAuthorsbopster
    • CommentTimeSep 4th 2011
     
    Hi just wondered if you sold boiler etc. (am new to forum)

    Cheers
    •  
      CommentAuthorSteamyTea
    • CommentTimeSep 5th 2011 edited
     
    Posted By: AmieB4. The boiler is in an outbuilding which is directly behind a neighbour's house and the smoke from the flue very often, goes straight into her bedroom.

    And your trying to sell this, think you have shot yourself in the foot, but then what do people expect from burning timber.
  1.  
    But ST, Amie is trying to sell it to someone who almost certainly won't install the flue terminal next to a neighbour's window! Surely no foot-shooting at all?

    Amie, wonder if we could persuade you off oil? Ground- or air-source HP, perhaps?
    • CommentAuthorJeff B
    • CommentTimeSep 5th 2011
     
    AmieB - sorry only just picked up on this thread. We got rid of our oil boiler because we could see that the price of heating oil was only going to go one way! Our fears appear to have been well grounded as the cost of heating oil has gone up here from about 30p per litre to 60p per litre in less than 4 years - what other fuel has shown such a dramatic rise? We switched to a wood pellet boiler and the price of pellets has hardly changed in the last 2 years - still about £180 per ton. The boiler produces virtually no smoke, just a little on start up. We have a thermal store too, which as others have pointed out, is a very flexible beast (couldn't afford an Akvatherm at the time though sadly).

    I would agree that you should seriously consider an automated wood pellet boiler, especially with the potential of payments under the RHI scheme which should start next October. I am looking forward to receiving payments under the scheme myself. Equipment and installer must have MCS accreditation though, so be careful.
    • CommentAuthorowlman
    • CommentTimeSep 5th 2011 edited
     
    Posted By: AmieB .
    1. We need the space that the boiler is taking up. It is huge and if we remove it, I can use the outbuilding that it is housed in presently as a studio. I am an illustrator and have nowhere else in the house to work.
    2. We travel for long periods of time. A month and more...especially during the winter and we feel that we don't want to impose upon neighbours to come in and stoke up the boiler every once in a while to keep the pipes from freezing.
    3. There is no radio-controlled thermostat that works through the thick stone walls (it wasn't connected originally by wires to the house)...so the heating has to be on or off during the winter.
    4. The boiler is in an outbuilding which is directly behind a neighbour's house and the smoke from the flue very often, goes straight into her bedroom.

    Unfortunately we're North Facing so solar panels won't be practical and they have been rejected eslewhere in the village by the Parish Planning council. Sigh.

    It would appear to me AmieB that your work/life balance is incompatible with centralised biomass burning in any guise, which in my experience does require some supervision. The previous occupant may have had more time to manage the system and seems to have gone down the vey basic installation route,-" bonfire in a box " at the end of the garden with little regard for remote monitoring or control.
    The RHI side of things is lucrative and you should bear that in mind with any future descisions. The same goes for any grants you may be eligible for. ASHP/GSHP may be a too expensive option. So what are you left with; oil as you've already alluded to, solar which you say the planners have dismissed, woodstove in some form, in the house. Take the line of least resistance, argue the toss with the planners re solar, see the long thread on this forum on the subject, and put a small pellet woodstove/boiler in the house and go for RHI. If they cave in on the solar front stick up some PV to help fund the lot. BTW keep the Akvaterm, move it, re connect and re use.

    PS I assumed that the solar was a possibility except for the planning issue.
  2.  
    There should be no issue with the solar unless you are a listed building.
    It is Permitted Development on a roof slope and does not require planning permission.
    It is Permitted Development on a wall unless you are in a conservation area or a world heritage site, the wall is a principal or side elevation of the house AND is visible from a highway.

    Applies to solar thermal or solar PV.
    Similar provisions for outbuildings - check the regs [Permitted Development PART 40 - INSTALLATION OF DOMESTIC MICROGENERATION EQUIPMENT] or search other threads.
    :wink:
  3.  
    Hi Amie,
    can you PM me please ref boiler? may be interested.
  4.  
    If the boiler is still for sale, can you give me a call.
    01450880221.
    Regards Ian
    • CommentAuthorfinny
    • CommentTimeMay 21st 2012
     
    funny old world! I m in the market for a minidigger and have a log boiler and thermal store for sale!:cool:
  5.  
    What price for the Vigas boiler? Am interested and can collect.
    Ronnie
  6.  
    Mcccccknnnnnnie - the last post on this thread was more than 2 years ago :wink:
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