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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Roger<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Those are very simple implementations of basic stove science. Well done.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>How strong are the bricks? Can you saw them? Are the producers capable of making a round clay grate like the one shown in the Anglo SupraNova picture?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>And how’s married life?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=top style='padding:0mm 0mm 0mm 0mm'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi Crispin<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> Yes I learned that trick from you and others, we have three other primary air holes on the first layer that enter behind the centre of the fire brick walls (so its not aligned) to help oppose air entry through the outer fuel hole. The fire box also is not enclosed tightly so air can get in between the bricks at the corners of the combustion chamber so it helps oppose the interior fuel hole air entry. With the round shroud, the pot can function as a plug to slow the airflow so we limit excess air to a reasonable level. All these factors help us get the air warmer before it enters the combustion chamber. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> We have 4 secondary air holes, perhaps we could use more but the masons like to keep things simple. There are compromises on everything. We have found the more holes in the walls the more the structure is vulnerable and difficult to build. Our design aim is profound simplicity, easy to build and easy to use is whats working for us. Our biggest problem to date has been sorting out the mortaring and windows to stop the rows from breaking apart when they are banged with a heavily loaded pot. What we have now the local masons are pretty happy to work with and the women are very satisfied with the lack of smoke and fuelwood savings and speed. One thing that surprised me was how much people appreciated the safety of the stove for children.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> regards<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>roger <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <span style='color:#1F497D'><o:p></o:p></span></p></div></td></tr></table><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>