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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 AD<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'>Your story is not very unusual. It is unfortunate that people produce stoves that have chimneys, but are not actually clean-burning. My point is that just because one produces a chimney stove is no excuse not to use that additional expense to create the draft needed to completely burn the fuel. Astonishing really. <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'>I wonder if there is too much emphasis on ‘clean indoor air’ without enough emphasis on ‘not needing to worry about clean indoor air’ in the first place. <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'>That level of deposition is depressing. I heard about a stove being produced in the tea country high in Kenya which is used for space heating and cooking, According to the designer the 3 inch chimney would clog after three months. That is ridiculous! What kind of crummy combustion is that?<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'>A chimney is as good as a fan – especially 3.5 metres. Fan stoves are supposed to be really clean or you have not done a good job. Shoving bad combustion outside does not solve much. The situation in Ulaanbaatar is exactly like that. No one has a stove without a chimney. The air outside is so polluted that it is contaminating the air drawn into the homes. So the chimney solved nothing – the problem is the stove.<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'>Your grate price is good! I think we should be jealous! It would be so nice to be able to get good parts in cast iron.<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'>Thanks<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><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Dear Crispin,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>the grate costs about a dollar each, whereas a 3.5 m long chimney having a diameter of about 8 cm costs about US$6. Formerly, these chimneys were mass produced as water pipes, but nowadays people use plastic pipes for water. There is only one manufacturer in our state who makes the cement chimneys, and about 15% of them are found to be broken on arrival. Fixing the chimneys is a tricky business, because one has to make a hole into the ceiling or the roof of the house. If this hole is not properly sealed, rainwater drips through it. After using it for about 3 months, the chimney generally gets choked with tar, which is very difficult to remove. Once that happens, the stove produces more smoke than the traditional stove used to produce, and disgusted, the housewife removes the improved stove along with the chimney. We have recently installed our chimneyless stoves in about 1000 households under a special programme funded by Cummins (India) Ltd. These stoves are now in operation for almost a year and there are no complaints.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Yours<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'>A.D.Karve<o:p></o:p></p></div></div></body></html>