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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am puzzled by some of what I read about performance of stoves. For example, I saw this summary report from “Stove Performance Inventory”, Oct 2012, Berkeley Air Monitoring Group. Which shows no biomass stoves meeting Tier 4 goals and well performing gasifiers in Tier 3 for emissions. <o:p></o:p></p><p class=MsoNormal><img width=557 height=471 id="Picture_x0020_2" src="cid:image005.jpg@01CFE890.A52258E0"><o:p></o:p></p><p class=MsoNormal>From Stove Performance Inventory, Oct 2012, Berkeley Air Monitoring Group.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Then I read that the InStove institutional rocket stove achieves Tier 4 in all categories except for Tier 3 in High Power PM. See chart:<o:p></o:p></p><p class=MsoNormal><img width=409 height=194 id="Picture_x0020_1" src="cid:image006.png@01CFE890.A52258E0"><o:p></o:p></p><p class=MsoNormal>I realize this is an institutional stove and we can’t expect the same performance from a small family size stove, but it still seems surprising.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Have any smaller rocket stoves come close to this?<o:p></o:p></p><p class=MsoNormal>Natural draft gasifiers?<o:p></o:p></p><p class=MsoNormal>What is the best gasifiers have been able to achieve?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>As an aside it seems that few stoves are tested with the same measures or criteria making it hard to know which are actually doing better.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Huck<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#400040'>Huck Rorick</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:gray'>Executive Director<br>Groundwork Institute<br>2640 Silvercrest Street<br>Pinole, CA 94564<br>Phone: 510-222-4111<br>email: </span><span style='font-size:12.0pt'><a href="mailto:huckrorick@groundwork.org"><span style='font-family:"Arial","sans-serif";color:blue'>huckrorick@groundwork.org</span></a></span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:gray'><br></span><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:gray'>Website: </span><u><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:blue'><a href="http://www.groundwork.org"><span style='color:blue'>www.groundwork.org</span></a></span></u><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>