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)

Envi Blocks will void my stove warranty!

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by isipwater, Jul 31, 2013.

  1. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    Hi,

    My local stove shop and reps from both Travis Industries (Lopi, Avalon) and Pacific Energy have all told me that using any compressed wood bricks/logs will void my new stove warranty.

    My local stove shop installer told me that burning one compressed log/block is ok but anymore than that will over fire the stove. He said that compressed logs burn fine in fireplaces and inserts but not wood stoves.

    I am about to get a Lopi Endeavor installed (my first wood stove) and am having trouble getting seasoned wood. I thought I fixed the problem when I ordered two pallets of Envi blocks. Now I am thinking of canceling the order as not to void the 7 year Lopi warranty.

    There are many different types/quality of compressed wood products. Surely some of them must burn appropriately in a Lopi or PE stoves. Should I cancel my Envi block order? I have until tomorrow morning to cancel the order!!

    Helpful Sponsor Ads!





  2. USMC80

    USMC80 Minister of Fire

    Joined:
    Mar 27, 2013
    Messages:
    842
    Loc:
    New Jersey
    you can use the Envi blocks to assist less seasoned wood that you have. I would never burn just envy blocks as you will probably overfire
  3. jeff_t

    jeff_t Minister of Fire

    Joined:
    Sep 14, 2008
    Messages:
    3,774
    Loc:
    SE MI
    If you don't tell, will anyone know? Don't overfire it. Those blocks are really dry, and can offgas really quickly. One or two in a load can supplement some not so dry wood, but I surely wouldn't burn a full load.
    ScotO and firebroad like this.
  4. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    Yes, I currently have oak that is 37% moisture. I was planning on mixing the Envi blocks with that.
  5. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Burned correctly I found overfiring was not an issue with BioBricks. I burned up to 13 at a time per instructions in a Castine with no problem. They need to be loaded and packed correctly. However, how many people read directions these days is a concern. I also burned and liked the highly compressed logs from Northern Idaho Energy Logs and from Prest-Logs from Homefire. If you respect the product and read the instructions, they are a nice heating fuel. I would recommend avoiding cheap imitations (low compressed fuel).

    http://www.hearth.com/talk/wiki/biobricks/
    http://www.hearth.com/talk/wiki/Northern_Idaho_Energy_Logs/
    http://www.hearth.com/talk/wiki/home-fire-prest-logs/
    Heatsource and Delta-T like this.
  6. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    Yes, I would do a mix, but these stove companies should void warranties for over firing not because I use Envi blocks! Can't over firing also happen with cord wood as well?
    ScotO likes this.
  7. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    What is a castine?
  8. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Have you resplit the oak? That is very wet wood still and shouldn't be burned this year. Maybe order some ash, beech or maple for this year and save the oak?

    Yes it can. As a new burner I would err on the side of caution and get some dry wood if possible.
  9. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Jotul F400
  10. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    Were you mixing the bricks with cord wood? This is in a stove right? Why would my experienced stove installer say two bricks will over fire and dirty the chimney?
  11. isipwater

    isipwater Feeling the Heat

    Joined:
    Jun 6, 2013
    Messages:
    349
    Loc:
    South Shore, MA
    I am waiting for my back ordered Fiskar wood spliter from amazon, due to arrive this week and then I will get to work. It is very hard for me to get truly seasoned hardwood at a decent price. Everyone has wet wood to sell me though.
    jakeyboy likes this.
  12. maple1

    maple1 Minister of Fire

    Joined:
    Sep 15, 2011
    Messages:
    4,254
    Loc:
    Nova Scotia
    Over-fires dirty chimneys?

    That is sounding backwards to me.
    Trilifter7 likes this.
  13. joescho

    joescho Feeling the Heat

    Joined:
    Feb 11, 2009
    Messages:
    363
    Loc:
    Northeastern PA
    I bought 2 bags one year for my parents with a traditional fireplace. They do get pretty hot.
  14. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Screw trying to get a decent price this season. Get decent dry wood from a reputable wood company and you will have a much better burning experience.
  15. Delta-T

    Delta-T Minister of Fire

    Joined:
    Feb 27, 2008
    Messages:
    3,125
    Loc:
    NH
    agreed, I have run similar product in a Harman Oakleaf for a few years now..no problems. Though I've never put in 13....holy hottness...and 47 hours of burntime.
  16. Jags

    Jags Moderate Moderator Staff Member

    Joined:
    Aug 2, 2006
    Messages:
    15,272
    Loc:
    Northern IL
    It sounds quite contrary to normal thought but can be true if all the stars align properly. If the rate of off gassing exceeds the ability for the tubes or cat to consume them, they have no where else to go but up the stack.
  17. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    The BioBricks don't all burn at once when packed in with no air gaps. If you read the wiki article you will see the temps the stove burned at were reasonable and far from overfiring at 650F max. The fire only lasted about 6 hrs.
    http://originalbiobricks.com/howtoburn

    I'm not sure how Envi blocks would burn in the same test. Their instructions are a bit less specific.
  18. relay

    relay New Member

    Joined:
    Sep 1, 2011
    Messages:
    12
    Loc:
    Eastern MA
    FYI, I am relativly new to the wood stove arena but I am a fast learner and deep researcher :)

    IMHO, if you learn how to load and use the compressed wood products, the danger of overfiring is the same as with cord wood.
    Load the stove to reduce the exposed surface of the compressed products and you have an easily duplicatable burn every time, unlike with cord wood.
    With cord wood, sometimes in the mornings I still have a 400 degree stove with 20% material left and other mornings, a cool stove.
    That's the main reason I like the compressed products.
    Inside of 1 month I learned EXACLY how many bricks to put in the stove based on the outside temperature, inside temperature and desired heat.

    With the Bio Bricks, I would load anywhere between 12 - 18 for night loads and 6 - 12 for day loads. A 350 - 400 degree stove is perfect as you really don't need to wait for the BioBricks to get going. The existing coals and temps will take care of that for you. The bigger issue is getting the blocks in there tightly packed together which is hard to do mixing with wood coals. Much easier if exclusivly compressed products.
    With a colder stove comes the danger. You REALLY have to let the compressed products get good and going before you damper down or you will kill the burn. hence the tendency to go off to other things and come back 45 minutes later to a 700+ degree stove.

    I don't have access to much free wood and scrounging in my area is tough, especially since I have small pickup that can't handle much. Compressed wood products and firewood are close to the same prices.
    IMHO, I see nothing but benefits to the compressed products. Very little mess, no bugs, 1/3 space requirements, no mess in the driveway, no splitter to buy (although I did buy one as I expected to harvest from my camp in Maine but can't do that now with the "no transport across state line regulations to curtail the bugs.), no crappy loads of firewood that were sold as dry only to be visably rotten as you pull in your driveway!

    For me, the compressed products are so consistant that if i have to buy something, it will always be compressed product if the prices are close.

    Hope this helps....
  19. relay

    relay New Member

    Joined:
    Sep 1, 2011
    Messages:
    12
    Loc:
    Eastern MA
    BTW, I believe a manufacturer could solve most of the downfalls and potential of overfire with compressed wood products by making a larger product that would not require tight stacking to reduce to exposed surface area.
    I believe a 20lb block would be about the perfect size. As I understand it though, a machine capable of compressing something that large would be prohibitavly expensive and probably will not happen. At least, that was the comments I received when I inquired about this previously.
  20. Delta-T

    Delta-T Minister of Fire

    Joined:
    Feb 27, 2008
    Messages:
    3,125
    Loc:
    NH
    I use the Orford compressed log..is 2.2lb (1kg) per log ~18k btu/log. I put in as many as five, tightly packed, and gotten 6+ hrs in the leaf, which is smallish in size. I haven't watched the temps too closely, but def not near overfire. granted, it shares heating duties with some of the pellet stoves, so we don't "need" it to do a lot of work. I will do some better experiments this coming season. (the packaging from Orford say no more than 3 logs at a time, we stuck with that for a while and worked up to the 5...cuz, you know, stove shop guys+fire=trouble).
  21. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Looks like the Orford Logs are actually bricks. Is that right?
  22. Delta-T

    Delta-T Minister of Fire

    Joined:
    Feb 27, 2008
    Messages:
    3,125
    Loc:
    NH
    they're 2.5"hx2.5"dx11"long...is somewhere between a log and a brick I guess. they're squared off and stack nicely.
    NortheastAl likes this.
  23. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    49,873
    Loc:
    South Puget Sound, WA
    Not a blog or a lick, it's a "Brog"!
    Delta-T likes this.
  24. Grisu

    Grisu Minister of Fire

    Joined:
    Nov 1, 2010
    Messages:
    2,763
    Loc:
    Chittenden, VT
    Get a stove or IR thermometer; that is the only way to know whether you are overfiring the stove or (as in my case) burn efficiently.
  25. Heatsource

    Heatsource Minister of Fire

    Joined:
    Dec 19, 2011
    Messages:
    786
    Loc:
    Northern CA
    Alot of my customers use energy logs, haven't noticed particular overfiring symptoms while doing annual cleanings/ and the chimneys seem to stay cleaner than with cordwood too

Share This Page