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

    Joined:
    Feb 25, 2017
    Messages:
    6,592
    Likes Received:
    25,096
    Location:
    Washington State
    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.
     
    Scotty Overkill and papadave like this.
  2. Fabz

    Fabz Banned

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny
    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 !
     
    FatBoy85 likes this.
  3. FatBoy85

    FatBoy85

    Joined:
    Feb 25, 2017
    Messages:
    6,592
    Likes Received:
    25,096
    Location:
    Washington State
    12B7EAE5-927F-4148-AC3A-36D3E79FAB64.jpeg
    I wonder how long the heat would last on these...
     
  4. Fabz

    Fabz Banned

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny
    Experiment ! I know the cast-iron skillet I use to fry my eggs stays hot a looooong time !
     
    bearverine and FatBoy85 like this.
  5. FatBoy85

    FatBoy85

    Joined:
    Feb 25, 2017
    Messages:
    6,592
    Likes Received:
    25,096
    Location:
    Washington State
    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

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny
    Believe it or not the BEST substance to use is water - comes out of the tap for FREE !
     
    Steve likes this.
  7. XXL

    XXL

    Joined:
    Dec 28, 2014
    Messages:
    2,932
    Likes Received:
    15,677
    Location:
    Ontario, Canada
  8. yooperdave

    yooperdave

    Joined:
    Jun 16, 2014
    Messages:
    32,857
    Likes Received:
    200,075
    Location:
    Michigan's U.P.


    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!!!
     
    bearverine and XXL like this.
  10. scavenger

    scavenger

    Joined:
    Apr 13, 2016
    Messages:
    1,776
    Likes Received:
    6,251
    Location:
    saybrook township ohio
    That's the coolest thing I've ever seen!! Talk about convection! Paint the walls dark and cozy the whole picture up----single guy?
     
    Fabz, yooperdave and XXL like this.
  11. bert the turtle

    bert the turtle

    Joined:
    May 30, 2014
    Messages:
    790
    Likes Received:
    4,222
    Concrete walls, concrete floors. Does the trick for me!
     

    Attached Files:

  12. bearverine

    bearverine

    Joined:
    Nov 8, 2014
    Messages:
    523
    Likes Received:
    1,967
    Location:
    Winchester, Indiana
    LOL. THAT'S FLIPPIN AWESOME!
     
    MikeInMa likes this.
  13. XXL

    XXL

    Joined:
    Dec 28, 2014
    Messages:
    2,932
    Likes Received:
    15,677
    Location:
    Ontario, Canada
    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

    Joined:
    Nov 8, 2014
    Messages:
    523
    Likes Received:
    1,967
    Location:
    Winchester, Indiana
    Dang, Bert, that's a nice setup, too!
     
    bert the turtle and Thor like this.
  15. Fabz

    Fabz Banned

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny
     
  16. EnglishBob

    EnglishBob

    Joined:
    Sep 28, 2015
    Messages:
    398
    Likes Received:
    2,386
    Location:
    Upstate NY
    I asked her....................then the fight started.

    :rofl: :lol:
     
    Fabz and concretegrazer like this.
  17. Fabz

    Fabz Banned

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny
    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 ... ​
     
    TurboDiesel, BrianK and XXL like this.
  18. LodgedTree

    LodgedTree

    Joined:
    Aug 24, 2016
    Messages:
    2,371
    Likes Received:
    9,422
    Location:
    Maine
    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.
     
    XXL likes this.
  19. LodgedTree

    LodgedTree

    Joined:
    Aug 24, 2016
    Messages:
    2,371
    Likes Received:
    9,422
    Location:
    Maine
    What a sissy!

    A real man would just make a house out of the excavator that such a bucket fit on! :coldone:
     
    TurboDiesel, Midwinter and XXL like this.
  20. Fabz

    Fabz Banned

    Joined:
    Jan 30, 2017
    Messages:
    802
    Likes Received:
    1,150
    Location:
    Buffalo ny