<html><head></head><body bgcolor='#FFFFFF' style='font-size:12px;background-color:#FFFFFF;font-family:Verdana, Arial, sans-serif;'>Hi Steve,<br/>Whilst I'm well aware that you can optimize chimney effects and heat-exchanger efficiency and the like, do you really think it likely that Crispin is reporting on a furnace for which over 80% of the heat goes up the chimney unused?<br/><br/>regards,<br/>Ron Hongsermeier<br/><br/><br/><br/><blockquote style="border-left: 2px solid blue; margin-left: 5px; padding-left:5px; padding-top:5px;"><hr/><b>Von:</b> "Steve Taylor" <steve@thetaylorfamily.org.uk><br/><b>Gesendet:</b> Jul 26, 2011 10:18:25 AM<br/><b>An:</b> "Discussion of biomass cooking stoves" <stoves@lists.bioenergylists.org><br/><b>Betreff:</b> Re: [Stoves] WorldStove replies to BioFuelWatyche's latestimprecisereporting of facts.<br/><br/><br/><br/><div class="gmail_quote">On 26 July 2011 08:02, Ronald Hongsermeier <span><<a href="mailto:rwhongser@web.de">rwhongser@web.de</a>></span> wrote:<br/><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><br/>Coal, or any other combustible material has a particular energy content. You can't do anything to get 4 times as much energy value out of it. S</blockquote><div><br/>Hi Ron,<br/><br/>Well you CAN if you burn what you have more efficiently, so that the heat doesn't piddle away up your chimney. I think that's what our anonymous friend may mean.<br/><br/>Steve</div></div></blockquote></body></html>