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Thread: Firewood BTU'S

  1. #1
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    Default Firewood BTU'S

    Weight and heat content figures are based on seasoned wood at 20% moisture content and 85 cu ft of solid wood per cord. The air spaces subtracted.

    Wood species Lbs /Cord M BTU /Cord

    Osage Orange 4,728 32.9
    Hickory, Shagbark 4,327 27.7
    Eastern Hornbeam 4,267 27.3
    Beech, American 3,890 26.8
    Birch, Black 3,890 26.8
    Locust, Black 3,890 26.8
    Hickory, Bitternut 3,832 26.7
    Locust, Honey 3,832 26.7
    Apple 4,140 26.5
    Mulberry 3,712 25.8
    Oak, White 4,012 25.7
    Maple, Sugar 3,757 24
    Oak, Red 3,757 24
    Ash, White 3,689 23.6
    Birch, Yellow 3,689 23.6
    Hackberry 3,247 20.8
    Tamarack 3,247 20.8
    Ash, Black 2,992 20.5
    Birch, Gray 3,179 20.3
    Birch, White 3,179 20.3
    Walnut, Black 3,192 20.2
    Cherry 3,120 20
    Ash, Green 2,880 19.9
    Cherry, Black 2,880 19.9
    Elm, American 3,052 19.5
    Sycamore 2,808 19.5
    Maple, Red 2,924 18.7
    Fir, Douglas 2,900 18.1
    Box Elder 2,797 17.9
    Alder, Red 2,710 17.2
    Pine, Jack 2,669 17.1
    Pine, Norway 2,669 17.1
    Pine, Pitch 2,669 17.1
    Catalpa 2,360 16.4
    Hemlock 2,482 15.9
    Spruce, Black 2,482 15.9 7
    Pine, Ponderosa 2,380 15.2
    Aspen 2,295 14.7
    Butternut 2,100 14.5
    Spruce 2,100 14.5
    Willow 2,100 14.5
    Fir, Balsam 2,236 14.3
    Pine, White 2,236 14.3
    Basswood 2,108 13.8
    Buckeye, Ohio 1,984 13.8
    Cottonwood 2,108 13.5
    Cedar, White 1,913 12.2
    TALLY HO
    Ken

  2. #2
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    Default Re: Firewood BTU'S

    Loved to burn apple when I could get my dirty little hands on it. Makes coals like a champ.
    "Anyone who says they like portaging is either a liar or crazy."
    - Bill Mason


  3. #3
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    Default Re: Firewood BTU'S

    Quote Originally Posted by Canoez View Post
    Loved to burn apple when I could get my dirty little hands on it. Makes coals like a champ.
    Make the rounds to the orchards. I usually can score some just by asking.

  4. #4
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    Default Re: Firewood BTU'S

    Too bad we have pretty much only fir and hemlock around here. Not the best fire wood.
    "Twenty years from now you will be more disappointed by the things you didn't do, than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover." - Mark Twain

  5. #5
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    Default Re: Firewood BTU'S

    lots of black spruce and white birch in abundance to burn here , some fir

    couple of lumber producers from sweden on a trade mission, upon seeing hardwood coveted in furniture making, used for firewood, almost fell over .. they burn it ???



  6. #6
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    Default Re: Firewood BTU'S

    For what it's worth, I just took Ken's data, and divided the two columns to obtain BTU per pound, then compared each of them to the average BTU/#. The result is surprising: they're ALL within 6% of the average. So if you rate your firewood pile by weight, not size, it doesn't matter much what's in it.

    -leif


    (Species,Sub) (lb/Cord) (MBTU/Cord) (BTU/#) (Compared to Average)

    Osage Orange 4728 32.9 6959 6%
    Hickory Shagbark 4327 27.7 6402 -3%
    Eastern Hornbeam 4267 27.3 6398 -3%
    Beech American 3890 26.8 6889 5%
    Birch Black 3890 26.8 6889 5%
    Locust Black 3890 26.8 6889 5%
    Hickory Bitternut 3832 26.7 6968 6%
    Locust Honey 3832 26.7 6968 6%
    Apple 4140 26.5 6401 -3%
    Mulberry 3712 25.8 6950 6%
    Oak White 4012 25.7 6406 -3%
    Maple Sugar 3757 24 6388 -3%
    Oak Red 3757 24 6388 -3%
    Ash White 3689 23.6 6397 -3%
    Birch Yellow 3689 23.6 6397 -3%
    Hackberry 3247 20.8 6406 -3%
    Tamarack 3247 20.8 6406 -3%
    Ash Black 2992 20.5 6852 4%
    Birch Gray 3179 20.3 6386 -3%
    Birch White 3179 20.3 6386 -3%
    Walnut Black 3192 20.2 6328 -4%
    Cherry 3120 20 6410 -2%
    Ash Green 2880 19.9 6910 5%
    Cherry Black 2880 19.9 6910 5%
    Elm American 3052 19.5 6389 -3%
    Sycamore 2808 19.5 6944 6%
    Maple Red 2924 18.7 6395 -3%
    Fir Douglas 2900 18.1 6241 -5%
    Box Elder 2797 17.9 6400 -3%
    Alder Red 2710 17.2 6347 -3%
    Pine Jack 2669 17.1 6407 -3%
    Pine Norway 2669 17.1 6407 -3%
    Pine Pitch 2669 17.1 6407 -3%
    Catalpa 2360 16.4 6949 6%
    Hemlock 2482 15.9 6406 -3%
    Spruce Black 2482 15.9 6406 -3%
    Pine Ponderosa 2380 15.2 6387 -3%
    Aspen 2295 14.7 6405 -3%
    Butternut 2100 14.5 6905 5%
    Spruce 2100 14.5 6905 5%
    Willow 2100 14.5 6905 5%
    Fir Balsam 2236 14.3 6395 -3%
    Pine White 2236 14.3 6395 -3%
    Basswood 2108 13.8 6546 0%
    Buckeye Ohio 1984 13.8 6956 6%
    Cottonwood 2108 13.5 6404 -3%
    Cedar White 1913 12.2 6377 -3%
    Average 6574 0%

  7. #7
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    Default Ash be the best IMHO

    Beech wood fires burn bright and clear
    If the logs are kept a year
    Chestnut only good they say
    If for long ‘tis laid away
    But ash new or ash old
    Is fit for queen with crown of gold

    Birch and fir logs burn too fast
    Blaze up bright and do not last
    It is by the Irish said
    Hawthorn bakes the sweetest bread
    Elmwood burns like churchyard mold
    E’en the very flames are cold
    But ash green or ash brown
    Is fit for queen with golden crown

    Poplar gives a bitter smoke
    Fills your eyes and makes you choke
    Apple wood will scent your room
    With an incense like perfume
    Oaken logs, if dry and old
    Will keep away the winter’s cold
    But ash wet or ash dry
    A king shall warm his slippers by

    Author unknown

  8. #8
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    Default Re: Firewood BTU'S

    [QUOTE=Torna;1743142]For what it's worth, I just took Ken's data, and divided the two columns to obtain BTU per pound, then compared each of them to the average BTU/#. The result is surprising: they're ALL within 6% of the average. So if you rate your firewood pile by weight, not size, it doesn't matter much what's in it.

    -leif

    You are absoutly correct. Pound for pound it doesn't make much difference.
    That is why pellet stove fuel is a pretty good buy, it is made from wood that has little value.
    As for my firewood Black Birch is tops, it smells good when cutting and when burning, that and Beech makes the best longest lasting fire, with minimal ash left over, those 2 woods burn just fine within 1 month of cutting when stored inside.
    I use a lot of Red Oak because I have so much of it, but it requires extensive drying time.
    I have some Hickory and Hornbeam which I use to clean the chimney.
    TALLY HO
    Ken

  9. #9
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    Default Re: Firewood BTU'S

    I was going to post the caution about burning Osage Orange (Bois d'Arc) also with the caveat that even small pieces are better used elsewhere on a boat and I would consider it a kneecapping offense to use it for firewood.....
    Wakan Tanka Kici Un
    ..a bad day sailing is a heckuva lot better than the best day at work.....
    Fighting Illegal immigration since 1492....
    Live your life so that whenever you lose, you're ahead."
    "If you live life right, death is a joke as far as fear is concerned."

  10. #10
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    Default Re: Firewood BTU'S

    Quote Originally Posted by paladin View Post
    I was going to post the caution about burning Osage Orange (Bois d'Arc) also with the caveat that even small pieces are better used elsewhere on a boat and I would consider it a kneecapping offense to use it for firewood.....
    Doesn't Osage Orange make beautiful wood for bows? (Hence Bois d'Arc)
    "Anyone who says they like portaging is either a liar or crazy."
    - Bill Mason


  11. #11
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    Default Re: Firewood BTU'S

    "Doesn't Osage Orange make beautiful wood for bows? (Hence Bois d'Arc)"

    Yup.

    Most of what I burned was oak. An occasional piece of cherry or walnut, but I almost always pulled those aside to think on. Just small experience, but birch burned off much more quickly than any of the above.

    I lived with a wood cookstove for awhile, mostly used for heat. There was a wide range of lore amongst the old timers about which wood was best for what. Such and so for biscuits, like that. Fast hot fires v long slow ones. For heating I found oak pretty good.
    So many questions, so little time.

  12. #12
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    Default Re: Firewood BTU'S

    Hmmm...85 cubic feet of any Australian hardwood will run 5100 lb .You guys must really have to cut some huge volumes of firewood !!
    Try to work out what the marketing guy wants you to do then do precisely the opposite.

  13. #13
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    Default Re: Firewood BTU'S

    With the resurgence into martial archery and into hunting in Germany, a usable stave of Bois d'Arc will bring premium prices. I have some 1 1/2" x 3" x 6 foot staves in the basement, all straight grained, that I can get 150-300 U.S. dollars for if I were to offer for sale in Germany. I use it for shells on blocks, and belaying pin handles, although the last couple of dozen that I made were teak.
    Wakan Tanka Kici Un
    ..a bad day sailing is a heckuva lot better than the best day at work.....
    Fighting Illegal immigration since 1492....
    Live your life so that whenever you lose, you're ahead."
    "If you live life right, death is a joke as far as fear is concerned."

  14. #14
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    Default Re: Firewood BTU'S

    Quote Originally Posted by paladin View Post
    With the resurgence into martial archery and into hunting in Germany, a usable stave of Bois d'Arc will bring premium prices. I have some 1 1/2" x 3" x 6 foot staves in the basement, all straight grained, that I can get 150-300 U.S. dollars for if I were to offer for sale in Germany. I use it for shells on blocks, and belaying pin handles, although the last couple of dozen that I made were teak.
    ::ROOL:::

    Good Ash, Yew, Lemonwood and Osage Orange staves would get you some serious followers.
    "Anyone who says they like portaging is either a liar or crazy."
    - Bill Mason


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