In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

Adding thermal mass to your woodstove

Discussion in 'The Wood Pile' started by Fabz, Dec 30, 2017.

  1. FatBoy85

    FatBoy85

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    Hey thanks!
    she is a nice mass, loves the heat. I actually thought this doggie wouldn’t like it all that much since she prefers being out all the time but she’s just aging so heat must really feel good.
     
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  2. Fabz

    Fabz Banned

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    Well I guess wood-burning is more art than science ... I’ve discovered that about 1000lbs of stone works quite nicely ! When the stove is roaring during the burn cycle some of the heat is absorbed into the stone to be released when the stove dies down ... have 2 SS rectangles that hold about 3 gals of water in each ... have a temp gage in one ... seems to run well when water is 170 in the tank ... when water temps get down to about 130 - load 2 more splits ... it’s ZERO here and I’m at 63 degrees- when the thermal mass and water gets to operating temp it uses Very Little wood to keep the joint at 61-64 degrees- key is to never let her go cold - burn 24-7 - your mileage may vary !
     
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  3. FatBoy85

    FatBoy85

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    12B7EAE5-927F-4148-AC3A-36D3E79FAB64.jpeg
    I wonder how long the heat would last on these...
     
  4. Fabz

    Fabz Banned

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    Experiment ! I know the cast-iron skillet I use to fry my eggs stays hot a looooong time !
     
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  5. FatBoy85

    FatBoy85

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    I’m sure I will some day. That’s about 60 lbs of steel on that so I never actually tried it. Folks thought I was joking but really if I was to be gone over a day without relighting and the temps dropped, these would really be able to... how can I say this? Test their mettle?
     
  6. Fabz

    Fabz Banned

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    Believe it or not the BEST substance to use is water - comes out of the tap for FREE !
     
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  7. XXL

    XXL

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  8. yooperdave

    yooperdave

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    OBVIOUSLY a single man lives there!
     
  9. JustWood

    JustWood Guest

    I've been in the planning stages for about a year to build a new home in 3-5 year in conjunction with retirement.
    Small, super energy efficient, windows, overhangs and layout with solar gain in mind. An incorporated greenhouse or grow room . A solar furnace and wood stove pizza oven combined with thermal mass .
    I've got some ideas on paper. Have a couple years to refine them and buy some property . I've wanted out of the snow belt for many years. If I don't do it soon it will never happen!!!
     
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  10. scavenger

    scavenger

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    That's the coolest thing I've ever seen!! Talk about convection! Paint the walls dark and cozy the whole picture up----single guy?
     
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  11. bert the turtle

    bert the turtle

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    Concrete walls, concrete floors. Does the trick for me!
     

    Attached Files:

  12. bearverine

    bearverine

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    LOL. THAT'S FLIPPIN AWESOME!
     
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  13. XXL

    XXL

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    I would love to build and do the same. Here is my buddy's double sided masonry heater complete with stone mantles, flush stone hearths and pizza oven. This is a three story masonry heater from the basement up. These pictures are from the main upper floor and there is a single sided fireplace in a central sitting area outside of the bedrooms on the level below this. Well built and very efficient house. A quick hot fire and these stones radiate heat for hours. This is the company that built his. Temp-Cast masonry heaters, masonry stoves and masonry heaters with bake ovens
    [​IMG]
    [​IMG]
    [​IMG]
     
  14. bearverine

    bearverine

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    Dang, Bert, that's a nice setup, too!
     
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  15. Fabz

    Fabz Banned

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  16. EnglishBob

    EnglishBob

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    I asked her....................then the fight started.

    :rofl: :lol:
     
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  17. Fabz

    Fabz Banned

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    Those are the BEST ! An associate of mine has one with a built- in oven and pizza-pie cooker ... you load about 20-50 pounds of wood in the morning and it burns upwards of 1800 degrees in there ... the way it is designed internally the heat follows a maze-like exit and the stone radiates warmth for 12-24 hrs depending on how much wood you put in ... ​
     
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  18. LodgedTree

    LodgedTree

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    A few years ago I had a cheap Vogelzang Stove and surrounded the pot bellied stove with rock; partly to keep radiant heat from a nearby wall, but also heat mass in retention.

    Honestly, I think it really helped.

    The temperature spikes in the room seemed less, but it was also a lot of thermal mass. I would say it was about a cubic yard of dry laid up rock. A cubic yard of gravel is around 3,000 pounds, so it was a LOT of rock at close to 1.5 tons.
     
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  19. LodgedTree

    LodgedTree

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    What a sissy!

    A real man would just make a house out of the excavator that such a bucket fit on! :coldone:
     
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  20. Fabz

    Fabz Banned

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