The
third element of Maslow's hierarchy is warmth. Obviously, in Alaska, this is a prime
concern, because our winters are long. Below is our experience
heating with wood, and below that, a comparison of BTUs generated by
various heating fuels.
OUTSIDE:
Since
we live in the middle of a forest, we decided to heat our cabin with
logs that my husband cuts throughout the year. The wood is stored in
a huge wood “corral" behind the
outhouse. We estimate that we have
about 9 cords of wood (a cord is 4x4x8 feet) or about 30,000 lbs on
hand for indoor fires. The corral has an “entrance” for newly
cut wood that needs to age and an “exit” for aged wood ready to
burn.
My lumberjack with mosquito net |
Up to
now, we have covered the huge pile with several thick tarps,
tied down with bungie cords. However, the past few winters have
featured the unwelcome visit of rain, believe it or not, in January
and February, followed by cold snaps and heavy snow. This
combination has sandwiched thick ice between layers of heavy snow,
cementing the tarp to the wood, making retrieval difficult. Next
summer, we plan to build a roof over the whole thing, preferably with
an extension that can cover a work area during rainy or snowy days.
Our
most accessible trees for fuel are spruce, birch, and alder (we don't
count willow, which is a poor fuel source). Spruce smells great
because it is a resinous wood but it can build up a gunky creosote
layer that clogs chimneys the way cholesterol clogs arteries. Many
people north of us, in ecosystems with fewer trees, do burn it
inside, but we favor it for aromatic, outdoor fires in a rock lined
fire pit near our lake shore. It generates 15.5 million BTUs per
cord. The second choice, alder, grows everywhere, like an
Alaska-size weed, but it burns really hot – so hot, I've read, that
“in the olden days” it was used in forges (on the other hand, it
generates 17.5 million BTUs per cord – less than some other woods).
Whenever I burn it, I see a tornado-like vortex form as the heat
rises. So, generally, I soak it for use in my meat smoker, and make
some rustic furniture with it, but mostly I burn it outdoors as a
trash tree or to help damp or rotted spruce burn better. Our third
option, and the one we prefer for burning indoors, is birch. It
generates the most BTUs: 23.6 million per cord. When nicely aged
and dry, it is light and burns cleanly. The ash in the chimney is
easy to clean out (not sticky). Every spring, I dump a winter's
weight of ash in my gardens (free source of nitrogen).