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<div class="moz-cite-prefix">Crispin, <br>
With the pellet burner that you saw in my house (5 meter chimney)
there is significant draft variation based on out side temperature
and wind. Up to a factor of four in gusty conditions. You would
think it a perfect application for a barometric damper. However
the windier days tend to increase my house heating load and the
increased draft pulls proportionately harder on both the primary
and secondary air resulting in higher output without noticeable
changes in combustion quality or system efficiency. This differs
from the oil burner which doesn't increase fuel to match the
increase in air during similar conditions. I would have to put
this in a lab to see what the precise limits of this are.<br>
<br>
Alex<br>
<br>
On 14/06/2013 6:41 PM, Crispin Pemberton-Pigott wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Dear
Lanny<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Correct.
We are using a flap-type which is installed in the side of
the chimney by putting a Tee between the first and second
pipes (they are clay pipe chimneys).<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">At
the moment we have no idea what the ideal draft is for the
stoves – 2 and 3-pot Jolentho Stoves. We will make
measurements and test the performance at different sustained
draft levels. There is a significant difference in the field
when a 3 or 5 meter chimney is added to the same stove.
Mostly there seems to be too much air drawn into the ones
with tall chimneys.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Regards<br>
Crispin<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0mm 0mm 0mm">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">++++</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""
lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:13.5pt">Like a
barometric damper?</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:13.5pt"><img
id="_x0000_i1025"
src="cid:part1.00050802.00080400@kingston.net"
name="a5XeXwssGEKnpM:"></span><o:p></o:p></p>
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<div>
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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