Posted by harry k on January 20, 2009, 12:11 am
On Jan 17, 8:26 am, david.willi...@bayman.org (David Williams) wrote:
> -> > -> > I've heard that a carefully managed 5 acre woodlot will heat a house
> -> > -> > perpetually.
> -> > ---
> -> > -> Grow more woods ! They cost effectively zero.
> -> >
> -> > -> Graham
> -> >
> -> > Five acres is about two hectares. Suppose the household has four
> -> > people. That means half a hectare per person will be needed for growing
> -> > wood for heating. Multiply that by, say, a billion (most people in the
> -> > world live in warm places), that means 5e8 hectares of land will be
> -> > needed. That's 5e12 m^2, or an area more than 2000 x 2000 km. Something
> -> > like the size of Europe. Do you really want to use that much good
> -> > agricultural land for growing heating fuel?
> -> How did you calculate their heating needs ?
> -> Graham
> It's all in the paragraph. 5 acres of trees per household of 4. One
> billion people in the world (probably an under-estimate) requiring
> heating.
> The 5 acres per house figure was from a previous post by someone else.
> dow
The general rule is 1 cord/yr per acre. 5 cords used per heating
season in northern climes is not enough. It could be a ballpark
average for the entire earth tho.
Harry K
Posted by harry k on January 20, 2009, 12:13 am
On Jan 17, 1:19 pm, david.willi...@bayman.org (David Williams) wrote:
> -> > The 5 acres per house figure was from a previous post by someone else.
> -> So you didn't calculate it. I thought as much.
> -> Graham
> Nope. Someone OBSERVED it.
> Donkey, nobody takes you seriously any more.
> dow
His "eeyore" is very fitting as it also translates to "ass"
Harry K
Posted by Jim Wilkins on January 20, 2009, 7:29 am
> On Jan 17, 8:26 am, david.willi...@bayman.org (David Williams) wrote:
> > The 5 acres per house figure was from a previous post by someone else.
> > dow
> The general rule is 1 cord/yr per acre. 5 cords used per heating
> season in northern climes is not enough. It could be a ballpark
> average for the entire earth tho.
> Harry K
I posted the 5 acre rule of thumb and then hinted that more land was
necessary if you can take only dead and fallen trees. You need to -
own- the forest to manage it.
The people I've asked typically use 5 cords per year here in NH, a
northern clime that is often downwind of Hudson's Bay, although I
average 2.
Jim Wilkins
Posted by harry k on January 20, 2009, 11:16 am
> > On Jan 17, 8:26 am, david.willi...@bayman.org (David Williams) wrote:
> > > The 5 acres per house figure was from a previous post by someone else.
> > > dow
> > The general rule is 1 cord/yr per acre. 5 cords used per heating
> > season in northern climes is not enough. It could be a ballpark
> > average for the entire earth tho.
> > Harry K
> I posted the 5 acre rule of thumb and then hinted that more land was
> necessary if you can take only dead and fallen trees. You need to -
> own- the forest to manage it.
> The people I've asked typically use 5 cords per year here in NH, a
> northern clime that is often downwind of Hudson's Bay, although I
> average 2.
> Jim Wilkins
My useage runs around 7 or a bit more a year but then I have an old,
underinsulated house and am burning mostly junk wood (Willow). Not
much hardwood available out here in the Palouse - originally all grass
land except for the bottoms where willow, pine, spruce and some fir
grew prior to settlement and the only good hardwoods are now found in
towns or farmsteads planted by the settlers. Of course I have a wife
that thinks the heating season begins when the outside temp drops
below 80 :).
Harry K
Posted by Eeyore on January 20, 2009, 1:40 pm
Jim Wilkins wrote:
> > On Jan 17, 8:26 am, david.willi...@bayman.org (David Williams) wrote:
> >
> > > The 5 acres per house figure was from a previous post by someone else.
> >
> > The general rule is 1 cord/yr per acre. 5 cords used per heating
> > season in northern climes is not enough. It could be a ballpark
> > average for the entire earth tho.
> I posted the 5 acre rule of thumb and then hinted that more land was
> necessary if you can take only dead and fallen trees. You need to -
> own- the forest to manage it.
> The people I've asked typically use 5 cords per year here in NH, a
> northern clime that is often downwind of Hudson's Bay, although I
> average 2.
A cord is an unknown measure outside the USA. It means nothing to me.
Graham
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> -> > -> > perpetually.
> -> > ---
> -> > -> Grow more woods ! They cost effectively zero.
> -> >
> -> > -> Graham
> -> >
> -> > Five acres is about two hectares. Suppose the household has four
> -> > people. That means half a hectare per person will be needed for growing
> -> > wood for heating. Multiply that by, say, a billion (most people in the
> -> > world live in warm places), that means 5e8 hectares of land will be
> -> > needed. That's 5e12 m^2, or an area more than 2000 x 2000 km. Something
> -> > like the size of Europe. Do you really want to use that much good
> -> > agricultural land for growing heating fuel?
> -> How did you calculate their heating needs ?
> -> Graham
> It's all in the paragraph. 5 acres of trees per household of 4. One
> billion people in the world (probably an under-estimate) requiring
> heating.
> The 5 acres per house figure was from a previous post by someone else.
> dow