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</o:shapelayout></xml><![endif]--></head><body 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'>Dear Martin,<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'>The stove is a Beckers 385, with 11Kw output, for 340m3 heating area. It has 2 air heating ducts, which heat air with the flue gas before entering the chimney.<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'>The problem is that it is in a room of 77M3 with a standard doorway leading into a passage way. A fair amount of warm air circulates to the rest of the house, but not enough to prevent hot air concentrating in the room.<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'>Itried blowing cold air into the room at ground level, with a standard room fan. This made the room more comfortable, and forced warm air into the passage way. This is not practical, and the fan mentioned uses a fair amount of power.<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 think that the way to go is to use a fan in a duct which sucks in the hot air leaving 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'>Thanking you,<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 style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It <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><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> stoves-bounces@lists.bioenergylists.org [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Boll, Martin Dr.<br><b>Sent:</b> 15 June 2012 10:33 PM<br><b>To:</b> stoves@lists.bioenergylists.org<br><b>Subject:</b> Re: [Stoves] moving warm air<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dear John,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Your problem with too much heat in the room of the stove will be more complex. I guess you will not solve the problem by only moving some hot air to another room. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I guess by my experience with a big stove, that a good amount of the heat will be released by your stove in form of radiation. If it is like this, I guess you have to shield the surrounding of the stove a lot from the radiation of the stove, that you will not feel so uncomfortable hot (as in the summer-sun) and to use the radiation to warm up a medium (air or some liquid or fast material absorbing the heat) and bring the radiated energy in that (captured) form into another room. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Example: some oil-filled radiators, which are electrically heated and can be moved to another space when warmed up, to warm another room, when brought there.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I guess it was worth a test, to concentrate the spread radiation onto a tube by a Rinnenkollektor ( I don’t know the English expression: e.g a Rinnenkollektor could consist of a half-pipe reflector with tube in its focus-line)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-you could test, it with a plastic dirty-water-tube cut into a 1/3 tube and lined with aluminium-foil, which concentrates the radiation onto a blacked copper-tube. In this copper-tube you could measure the temperature, to know if the temperature was useful for the other room.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The simpler way was, to hang close to the stove some bags filled with material that could absorb heat, and to remove them after being heated, to cool down in the neighbour-room.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>In that time of heating the bags you could feel, if the felt temperature in the room with the stove was agreeable. – My idea: Hang up some wet towels for a short time, to shield against the radiation. So you can feel (for a short time) immediately, if the radiation makes the feeling of too much heat or if it was the too high temperature of the air.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I know your problem, because I have a 14.5 kW high-mass stove which is heating a 120 m3 room. It feels feels to hot in the room, if the stove is really good fed, and gives much heat by its big surface. (5 m2) <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I thought about transporting hot air to a neighbour room to solve the problem, but I am nearly sure, it will not solve the problem, because the stove has a very big surface which radiates. If you would be interested, I could give you the address of the factory in Germany, to give you an impression of my stove to compare with yours.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Happy to have now summer-time in Germany-; but the temperatures are actually so low, that we use a little bit the space-heating-stove.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Interested how you think about and deal with that problem.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Have a comfortable feeling by your stove.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Martin <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Message: 3<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Date: Fri, 8 Jun 2012 20:14:44 +0200<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>From: "John Davies" <<a href="mailto:jmdavies@telkomsa.net">jmdavies@telkomsa.net</a>><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>To: "Discussion of biomass cooking stoves"<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>> <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Subject: [Stoves] moving warm air<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Message-ID: <<a href="mailto:000301cd45a2$95eba7c0$c1c2f740$@telkomsa.net">000301cd45a2$95eba7c0$c1c2f740$@telkomsa.net</a>><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Content-Type: text/plain; charset="us-ascii"<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>I have recently moved house, and have a dilemma. I have an anthracite heater in one room which is uncomfortably warm. I wish to >move the warm air into adjacent rooms to have a more even heating of the house. There is an open doorway leading into a >passageway, but the air movement is insufficient.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>> <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>My thoughts are to bore holes through the walls the size of a computer fan and mount such fans in the holes to distribute the warm >air.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>> <o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Would this be successful ? What wattage fan would move how much air ? Is the idea viable?<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Your thoughts would be welcome.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>John Davies,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>>Experiencing the first winter chill.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div></body></html>