<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;color:black'>With the amount of lead in a battery bank it changes temperature very slowly. Both gaining and losing heat is a very slow process.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;color:black'>I have never insulated battery banks, if in a cold area like here we size them larger for the slower reaction time in the winter anyway. Part of the reason being that I would bet that the acid would raise hell with the insulation! <o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;color:black'>We regularly see battery banks that are 40 degrees or so it presents no problem.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;color:black'>If the exhaust fan is running in a 70 degree building all it does is draw the warm air over the top of the battery and not really warm them much anyway, in an unheated building it will probably not make much difference.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;color:black'>The only way that I would put insulation in an unheated battery box is on the outside of the plywood, away from the acid and gasses. I would also make it removable in the summer.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 face=Calibri><span style='font-size:14.0pt'><o:p> </o:p></span></font></p></div><hr noshade="noshade" size="1"><p class="avgcert" align="left" color="#000000">No virus found in this message.<br>
Checked by AVG - <a href='http://www.avg.com'>www.avg.com</a><br>
Version: 10.0.1170 / Virus Database: 426/3305 - Release Date: 12/09/10</p></body></html>