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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It is the kind of adaptive comfort that
you have to physically move towards or away from to achieve the comfort you
want. My children would wake up and park their bums within inches of the
woodstove while coming to consciousness and then slowly moved on. It was a nice
ritual to watch and says a lot about the importance and placement of a radiant
heat source. Simple woodstoves I have found hard to control – especially the
common sheet metal variety that tend to distort and take in more air. Ours
would often tend to quickly overheat the living area in an evening (coupled
with cooking and physical activities). Effective way of shutting peoples brains
down and driving them to the cooler corners. Typically people contol burning by
‘size’ of the split or round as well as air – but that
amounts to controlling by moisture content (smaller split pieces generally being
dryer; the yule log.)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>As for wood. We recently had to take down
a 150ft balsam and I had fun introducing my son to the complete processing of a
tree and the amount of work and debris involved. As he was trying to split 24”
knotty rounds I made a joke about whether he thought the wood was worth the
effort as a way of storing heat versus solar water heating. It was considered
here that if you had about 5 acres of wooded lot you could ‘sustainably’
harvest for heating a home (3-4 cords). In early years I would harvest windfall
and occasionally a tree but I have come to believe that material is best left
on the ground – as part of what is needed to maintain habitat and soil. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoAutoSig><u><font size=3 color=green face="Gill Sans MT"><span
style='font-size:12.0pt;font-family:"Gill Sans MT";color:green'>JOHN SALMEN
ENVIRONMENTAL DESIGN<o:p></o:p></span></font></u></p>
<p class=MsoAutoSig><st1:Street w:st="on"><st1:address w:st="on"><i><font
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size=2 color=black face="Gill Sans MT"><span style='font-size:10.0pt;
font-family:"Gill Sans MT";color:black;font-style:italic'>,. <st1:City w:st="on"><st1:place
w:st="on">DUNCAN</st1:place></st1:City>, B.C. <st1:country-region w:st="on"><st1:place
w:st="on">CANADA</st1:place></st1:country-region>, V9L 6M7<o:p></o:p></span></font></i></p>
<p class=MsoAutoSig><i><font size=2 color=black face="Gill Sans MT"><span
style='font-size:10.0pt;font-family:"Gill Sans MT";color:black;font-style:italic'>PH
250 748 7672 FAX 250 748 7612 CELL 250 246 8541<o:p></o:p></span></font></i></p>
<p class=MsoAutoSig><i><font size=2 color=black face="Gill Sans MT"><span
style='font-size:10.0pt;font-family:"Gill Sans MT";color:black;font-style:italic'>terrain@shaw.ca<o:p></o:p></span></font></i></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
greenbuilding-bounces@lists.bioenergylists.org
[mailto:greenbuilding-bounces@lists.bioenergylists.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>John Straube<br>
<b><span style='font-weight:bold'>Sent:</span></b> December 27, 2010 9:40 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Environmentally-preferable
design, construction, building elements<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Greenbuilding] Wood
by the pound.</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>In the four family homes with wood stoves/fireplaces that I am closely
familiar with, the temperature is always much higher when wood is being burned.
Not sure why this is the case but I am guessing that it is because the
output of a wood appliance is harder to modulate over a wide range. The low
cost of wood is also likely a factor. Many people like the warm
temperatures to dry out wet boots, wet mits, and wet wood. Whatever the
reason I associate wood heat with much warmer temperatures in my part of <st1:State
w:st="on"><st1:place w:st="on">Ontario</st1:place></st1:State>.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>That said, wood heated houses tend to have quite cold
"edges", ie, the upstairs corner room could be 50F while the kitchen
is at 78F. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>This wide variation in temperature is an issue for many people and
seems to be one factor that limits the wide spread adoption of this heating.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>In my own very well insulated and airtight home, the 600 sf space with
the fireplace often is 75 to 78F and the coldest corner of the house (basement,
far corner) can be 10 F cooler. In my parents very leaky and poorly insulated
100 yr old home, the temperature is often 80F in the kitchen and 40F in the
upstairs far corner room during a 10F night.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>John<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On 2010-12-27, at 11:45 AM, Reuben Deumling wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Mon, Dec 27, 2010 at 5:15 AM, Corwyn <<a
href="mailto:corwyn@midcoast.com">corwyn@midcoast.com</a>> wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> That is, wood heats the same way that oil, or gas heats, so
calculating heat loss is sufficient without adding the complication of worrying
about fuel type.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
That I wonder about. My guess would be that wood used to stoke a wood stove
(rather than say an automated pellet or chip burner which are more common in <st1:place
w:st="on">Europe</st1:place> at the household scale) would be different in
terms of the terminal temperature portion of this calculation. The fact that we
are the regulator rather than a thermostat, not to mention that most of us who
heat with wood are involved in a large number of stages in the preparation of
the fuel, I could imagine that we might husband the wood/choose a different or
more variable terminal temperature/etc. than if we were heating with a liquid
fuel. But this is mostly just speculation. <br>
The physics, which I think is what you were driving at, Corwyn, is probably as
you say. My interest was in the social--if that is the right term--end of the
wood heat circumstances.<br>
<br>
Reuben Deumling<o:p></o:p></span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.5pt;font-family:Helvetica;color:black'>Dr John Straube,
P.Eng.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.5pt;font-family:Helvetica;color:black'>Associate Professor<o:p></o:p></span></font></p>
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<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><font size=2
color=black face=Helvetica><span style='font-size:10.5pt;font-family:Helvetica;
color:black'>University</span></font></st1:PlaceType><font size=2
color=black face=Helvetica><span style='font-size:10.5pt;font-family:Helvetica;
color:black'> of <st1:PlaceName w:st="on">Waterloo</st1:PlaceName></span></font></st1:place><font
size=2 color=black face=Helvetica><span style='font-size:10.5pt;font-family:
Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.5pt;font-family:Helvetica;color:black'>Dept of Civil Eng.
& School of Architecture<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.5pt;font-family:Helvetica;color:black'><a
href="http://www.buildingscience.com">www.buildingscience.com</a><o:p></o:p></span></font></p>
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