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Getting lots of heat from the brick around my insert. Glad I did a block off plate

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by WoodpileOCD, Jan 23, 2013.

  1. WoodpileOCD

    WoodpileOCD Minister of Fire

    Joined:
    Jan 19, 2011
    Messages:
    659
    Loc:
    Central NC
    I've been running my Buck pretty hard the last few days (as most of us have with the weather) and I occasionally throw the IR thermometer on the brick around the insert. The whole fireplace heats up and stores and releases lots of heat. You can see the temps registering 2 and 4 courses of brick up from the insert. The inside of the fireplace is getting anywhere from 150 to 220 depending on where I shoot it. I can't help but believe the block off plate is keeping that heat inside the living area and radiating it back into the house rather than up the chimney. That much mass throws a lot of heat and does it for a very long time.

    Anyone else ever measure this and what kind of results do you get.

    Here's a picture of the blockoff plate. Got the idea from a thread here called 'Poor mans blockoff plate" or something like that. Thanks to whoever posted that. Not that hard and highly recommend for anyone doing an insert install.

    Attached Files:

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  2. legrandice

    legrandice Burning Hunk

    Joined:
    Oct 5, 2006
    Messages:
    148
    Loc:
    South Hadley, MA
    I too have an insert in a brick fireplace. I have a home made block off plate in there as well. My brick works like a great heat sink. Long after the stove cools down it's still putting out a little heat.
  3. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
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    Loc:
    South Puget Sound, WA
    We've had many reports from folks that see a dramatic before and after improvement with a block off plate. This seems to be especially true for exterior chimneys, but all benefit from it.
  4. WoodpileOCD

    WoodpileOCD Minister of Fire

    Joined:
    Jan 19, 2011
    Messages:
    659
    Loc:
    Central NC
    Be green, i can't really vouch for a before and after because I changed so many things at the same time. Went from a 'slammer' install to a 25'liner with a BO plate and dryer wood. I'd never install another without it however. Oh yea, the other thing I did at the same time was remove the surround.
  5. BrotherBart

    BrotherBart Hearth.com LLC Mid-Atlantic Division Staff Member

    Joined:
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    28,740
    Loc:
    Northern Virginia
    I have a block-off plate over the 30-NC in the fireplace. And that load of bricks does just like yours and stores up heat and gives it back.
  6. begreen

    begreen Mooderator Staff Member

    Joined:
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    Messages:
    48,334
    Loc:
    South Puget Sound, WA
    Proof of the pudding seems to be there. If I had a fireplace I'd definitely have a block-off plate, but I took ours out 6 years ago.
  7. HaTaX

    HaTaX New Member

    Joined:
    Jan 19, 2013
    Messages:
    82
    Loc:
    Minnesota
    That's great! I have been digging around for a replacement for my insert and one thing I kept thinking was, it would be nice if I could get an insert that looked good without it's surround. Is that a Buck insert? Some of the inserts look good without their surround, and some others really expose a lot of nuts and bolts, yours looks great!

    I'll be keeping this in mind as I run my liner and install my block off plate, more heat is always good!

    And now you've got me surfing Buck's website trolling around for what inserts they offer, good job on that one. ;)

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