1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)

Can of worm alert....

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by FyreBug, Jan 9, 2013.

  1. FyreBug

    FyreBug Minister of Fire

    Joined:
    Oct 6, 2010
    Messages:
    771
    Loc:
    Kitchener, Ontario
    Sorry about this folks, but there was a heated debate a while back regarding pumice bricks vs. heavy silicate bricks to line up the fire chamber.

    Some folks contented that pumice (light weight) bricks were far superior in efficiency and would provide the best performances.

    As a manufacturer who use various material including the above I maintained it did not make a big difference and hence the can of worm and hot debate. I maintained that if it made such a big difference why would not all MFG use the light weight? Unfortunately I did not have the numbers to back me up then.

    Firstly, those advocating light weight bricks were right and ... wrong. Pumice bricks do have better insulating performance than heavy duty brick due to the amount of air in them.

    However, Our own internal testings between various material shows it hardly makes a difference between these 2 bricks on wall & floor of the fire chamber.

    Where it really makes a difference is in the baffle area. So there...

    While I'd love to share the hard data, it is proprietary so you'll just have to take my word for it.

    Helpful Sponsor Ads!





  2. NW Walker

    NW Walker Member

    Joined:
    Nov 26, 2012
    Messages:
    88
    Not to nitpick, but you really should qualify that statement as being specific to your stove design, rather than comprehensive for all stoves. In some designs, the difference is great, and the entire firebox being insulated is crucial. Heavy bricks will hurt performance significantly in some designs. I think that rather than it being a case of better or worse, it's just a simple matter of different properties in the different bricks, and using the right one for your application.
  3. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,672
    Loc:
    South Puget Sound, WA
    If this were universally true you would never see skamol in a stove.
  4. FyreBug

    FyreBug Minister of Fire

    Joined:
    Oct 6, 2010
    Messages:
    771
    Loc:
    Kitchener, Ontario
    Hence the can of worms...

    A plate steel wood stove between models and MFG are inherently the same. They are square boxes made of metal and bricks. Truly as far as design is concerned you cannot get simpler. Where design truly makes a difference is in air flow and tweaks where combustion occurs.

    Materials being the same, Laws of physics (conduction, convection) will apply similarly.
  5. FyreBug

    FyreBug Minister of Fire

    Joined:
    Oct 6, 2010
    Messages:
    771
    Loc:
    Kitchener, Ontario
    Did not say skamol which we use as well. We're comparing between bricks.
  6. BobUrban

    BobUrban Minister of Fire

    Joined:
    Jul 24, 2010
    Messages:
    1,712
    Loc:
    Central Michigan
    and there is the DBL edge sword so to speak of OVER insulation. You can insulate a forge that gets internal temps to 2500+ and the outside can be touched with your bare hand. Great for forge welding damascus steel but does not offer much convection into the room when you want to heat the space it sits in. So you can insulate too well. Sure you get extream internal temps and long burn cycles but no heat. I will stick with the harder bricks because I would tear up the softies to fast.

    Not an engineer and no "real" science in my testing process but I will say that without doubt - the pumace bricks insulate better in my forge than the hard ones but my rake and shovel would eat them for lunch in my NC30. Other stoves may work differently and therefore require the pumace.

    My 2cents
  7. rijim

    rijim Member

    Joined:
    Jan 19, 2009
    Messages:
    191
    Loc:
    RI
    No can of worms, use the product reccomended by the manufacture for your particular stove. End of story.
  8. corey21

    corey21 Minister of Fire

    Joined:
    Oct 28, 2010
    Messages:
    2,241
    Loc:
    Soutwest VA
    There be the answer to this thread.
  9. Bub381

    Bub381 Minister of Fire

    Joined:
    Feb 4, 2011
    Messages:
    867
    Loc:
    Mid-coast Maine
    Ayuh! but we appreciate the help.
  10. Jags

    Jags Moderate Moderator Staff Member

    Joined:
    Aug 2, 2006
    Messages:
    15,256
    Loc:
    Northern IL
    Hey, I am all for full info

    Is / was the only part that I needed to read. As I have said before...ya can't go wrong with installing what the mfg's used for your stove.

Share This Page