<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Lanny,<br>
I understand the comment below but I think flame height can be
shortened with excessive excess air. The lowest emissions CO/CO2
and highest temperatures, at some power levels, in appliances that
I have tested has often been when there is a significantly taller
tail of flame. <br>
<br>
However, don't believe all tall tails :)<br>
Alex<br>
<br>
On 14/04/2013 1:51 PM, Lanny Henson wrote:<br>
</div>
<blockquote cite="mid:91F19E7B5062427D8629DE8B69D5AF4F@main"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<meta name="GENERATOR" content="MSHTML 8.00.6001.19412">
<style></style><br>
</blockquote>
<span style="FONT-SIZE: 18pt; mso-bidi-font-family: Calibri;
mso-bidi-theme-font: minor-latin; mso-font-kerning: 14.0pt"><font
face="Calibri">The combustion air needs to be focused on the
combustion zone in a way that shortens the flame height. More
like the way a TLUD with a fan works. </font></span>
</body>
</html>