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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-US'>Dear Paul and All<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='color:#1F497D'>I am seconding the comments:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>></span>For this topic, I hope that the work of Kirk Harris and Jock Jill and Julian Winter and others will be considered for incorporation into you designs.<br><br><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>and<o:p></o:p></span></p><p class=MsoNormal><br><span style='color:#1F497D'>></span>4. Of course, so many things change when even a little forced air (FA) is applied. And that is why I have favored SINGLE entry points for the primary air and the secondary air. Force air will be increasingly more available, and its impacts are highly advantageous in TLUD stoves.<br><br><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>There is still much to know about how these stoves can be optimised first for combustion, then heat transfer, then controllability.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I can happily report that stoves which are TLULD’s have been submitted to the CSI-Indonesia stove pilot that are able to be controlled without a fan, across the range of power needed by the users in Central Java. That has been shown with the CSI-WHT which is a test method that replicates average user behaviour. That means we have already commercially available TLUD’s which have sufficient cooking power, sufficient power control and low enough emissions to meet user and programme needs. This is no small achievement.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I caution the tinkering community which has brought us to this stage, directly or indirectly, not to assume that anything new to you is new to everyone. That is not a criticism. That is a caution to be a bit circumspect about claims to novelty. There are companies working on these problems and they are not sharing much. Paul points out that some have received grants to work on this. That doesn’t mean the results are public or even published.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Remember that 3 years ago I reported there were TLUD stoves in Mongolia burning cleaner than the ambient air in terms of PM2.5. This is no small feat. I share what I can but I can’t cover everything that is going on. There are 6 qualifying stove this year in Ulaanbaatar. They are all <i>much</i> clean than a Philips fan stove, and that is the minimum to get into the programme – about a 95% reduction against the baseline stove burning the mandatory test fuel. All this is taking place without reference to the informal sector stove community (us, for the most part). There is a lot going on. The producers are all in Turkey, China and Mongolia.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>So going forward, if you want to build controllable and clean burning stoves, please check what is already being made available and try to extend or replicate those achievements. It is not necessary to have a fan to reduce emissions by 90 or 95%. It is necessary to understand well how things can burn and how to make fuels burn that well.<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>