losing heat up my flue

buck0123 Posted By buck0123, Aug 25, 2018 at 1:55 PM

  1. buck0123

    buck0123
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    Mar 19, 2014
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    ny
    I have a Aqua-therm wood boiler (pressurized) hooked to my oil boiler in the garage. wood boiler constantly circulates hot water thru the oil boiler. Feed from wood boiler goes into return of the oil boiler and feed from oil boiler returns to wood boiler. my issue is to much heat being lost thru flue.
     
  2. E Yoder

    E Yoder
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    Jan 27, 2017
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    The oil boiler flue or the wood boiler? Or both?
     
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  3. buck0123

    buck0123
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    Mar 19, 2014
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    Oil boiler. if I put my hand thru the damper I can feel heat going up the pipe.
     
  4. TCaldwell

    TCaldwell
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    Oct 26, 2007
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    Two ways, one would be a damper on the oil boiler flue, I think field controlls makes it, not sure I’d go that route. Or you could pipe the boilers parallel, this means there is common or shared piping between both boilers, causing no flow through the dormant boiler, thus when your on wood there’s no flow through the oil boiler so no stack losses.
     
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  5. buck0123

    buck0123
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    Mar 19, 2014
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    In parallel ok. Will this bring the oil boiler up to temp so it does not fire?
     
  6. TCaldwell

    TCaldwell
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    Oct 26, 2007
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    No, you will have to wire the aqua stat to be a cold start boiler, how do you get your dwh currently, coil in boiler, superstore as a separate zone or elec, propane ?
     
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  7. TCaldwell

    TCaldwell
    Minister of Fire 2.
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    Oct 26, 2007
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    Loc:
    860-868-9014 h 203 948 0864 c nw corner ct.
    I have a wiring schematic for a for a wood and backup heat source, piped parallel, it assumes the dwh source is not the oil boiler coil. If you pm me with a phone number I’ll send you a pic
     
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  8. maple1

    maple1
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    Sep 15, 2011
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    I don't really see much way around that if you are heating your DHW with your oil boiler in the summer. You would be losing heat even if your wood boiler wasn't running.

    Unless I'm not understanding something.
     
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