<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1504832178680_12139" dir="ltr"><span id="yui_3_16_0_ym19_1_1504832178680_13326">In the DOE-2 glass library I am looking at the double low-e (e3=.4) clear product, glass type code 2600.</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1504832178680_13415"><span id="yui_3_16_0_ym19_1_1504832178680_13326"><br></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1504832178680_13414"><span id="yui_3_16_0_ym19_1_1504832178680_13326">Does anyone know what the e3=.4 means? There are other products, such as type 2630 with e2=.1 with a much different assembly u-value.</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1504832178680_13489"><span id="yui_3_16_0_ym19_1_1504832178680_13326"><br></span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1504832178680_13488"><span id="yui_3_16_0_ym19_1_1504832178680_13326">Thank you,</span></div><div id="yui_3_16_0_ym19_1_1504832178680_13405"> </div><div class="signature" id="yui_3_16_0_ym19_1_1504832178680_13359">Paul Diglio<br>87 Fairmont Avenue <br>New Haven, CT 06513 <br><br><br></div></div></body></html>