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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-ZA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Paal wrote,<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><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>There is a need of a practical test where fuel and stove are evaluated together with the user. If you are saving some some energy and some minutes in time of cooking, it can easy be lost by handling the fuel and the stove or by cleaning the pots. The stove, the fuel and the cook is one unit, working together with respect for each others specialities.<o:p></o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:dotted windowtext 3.0pt;padding:0cm 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><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'>These are very wise words. At the first demonstration of my TLUD bituminous coal stove, which uses a chimney, with the pot sealing the top of the stove. I remember the reaction of some of the onlookers. <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'>After lighting the stove, and placing the pot, smoke exited the chimney, and stopped after less than 1 minute. I knew that the chimney had started drafting, pulling secondary air into the flame and causing the clean burn.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>One onlooker pronounced that the fire had extinguished, and many others agreed. Lifting the pot allowed a smoky flame to exit the stove. I replaced the pot and told them that the water would be boiling in 4 minutes. This caused much amusement and shaking of heads. Now there was much inspection of what was going on, with people standing close to the stove, feeling the heat and watching the chimney. The water boiled in 4 minutes, much to the amazement of many.<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'>This proves Paal’s comment about the user component. How does one explain to the user, and gain their acceptance that there can be fire without smoke. Especially if the flame cannot be seen. A case of training, training, training. With this stove, part of the answer was to drill a 3mm peep hole at a strategic place, so that the user could see the flame. <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'>Even if the user does not fully understand what is going on, acceptance is the minimum criteria. Acceptance to accept what cannot be understood, and acceptance of all the operating instructions. Not always an easy task, but proof that intensive training of the user is needed.<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'>Greetings to all, and keep up the good work.<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'>John Davies.<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><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 lang=EN-GB><o:p> </o:p></span></p></div></div></body></html>