<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
the conversion I have used is that R value (imperial) ft2*degF/Btu = 5.86 X R value (metric) in m2 *degC/W for the same thickness of material - an easy way of converting R values from imperial top metric to another for the same construction - it also helps demolish extravagant insulation claims made for some american materials when proponents have not done the conversion.<div><br></div><div><br></div><div><br></div><div>10.05 * 5.86 / 39.37 inches/m = 1.49 so its close<br><div><br></div><div><br></div><div> <br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>Graeme</div><div>Graeme North Architects</div><div>49 Matthew Road</div><div>RD1</div><div>Warkworth</div><div>tel/fax +64 (0)9 4259305</div><div> </div><div><a href="mailto:graeme@ecodesign.co.nz">graeme@ecodesign.co.nz</a></div><div>www.ecodesign.co.nz</div><br class="Apple-interchange-newline"></span> </div><br><div><div>On 16/06/2009, at 3:48 AM, <a href="mailto:contact@lamaisonenpaille.com">contact@lamaisonenpaille.com</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Hello,</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">For the purpose of publishing Bruce Kings book "Design of SB Buildings" in french I would appreciate someone from this list confirming Rob Tom's conversion below (for page 187):</div> <blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">A thermal resistivity of 1.45 ft^2*hr*degF/Btu*inch (Murrican)</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">converts to 10.05 m^2*degC/W*m (SIU).</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">The thermal conductivity, or lambda value = 1 / thermal resistivity</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><span class="Apple-converted-space"> </span>= 1 / 10.05<span class="Apple-converted-space"> </span>m^2*degC/W*m</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><span class="Apple-converted-space"> </span>= 0.0994 W/mK<span class="Apple-converted-space"> </span>lambda (λ)</div> </blockquote><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Thanks,</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">André de Bouter</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">La Maison en Paille</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">www.lamaisonenpaille.com</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">GSBN mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:GSBN@greenbuilder.com">GSBN@greenbuilder.com</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://greenbuilder.com/mailman/listinfo/GSBN">http://greenbuilder.com/mailman/listinfo/GSBN</a></div> </blockquote></div><br></div></div></body></html>