<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">What is the reason for not insulating that space? Why would vermiculite be a better conductor than air? <div>Does this apply to metal and masonry chimneys?<br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Clarke Olsen<br><a href="http://clarkeolsendesign.com">clarkeolsendesign.com</a><br>373 route 203<br>Spencertown, NY 12165 <br>USA<br>518-392-4640<br>colsen@taconic.net<br><br><br><br></div></span></div></span></div></span></div></span></div></span></div></span></div></span></span>
</div>
<br><div><div>On Dec 3, 2014, at 11:14 AM, Norbert Senf <<a href="mailto:norbert.senf@gmail.com">norbert.senf@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div><div><div><div>Under no circumstances should anything be put into the 2" air space that is specified around a UL/ULC listed factory chimney.<br><br></div>If you put vermiculite in there, you are voiding the UL listing of the chimney by virtue of not installing according to "manufacturers instructions". This creates liability for you.<br><br></div>This is a common misconception, and is the reason for the "attic radiation shield" required in attics, which are required to have a storm collar on them, specifically to prevent people from putting insulation into the 2" air space. Here in Canada, a radiation shield is also required around chimneys in chases, specifically to avoid this scenario.<br><br></div>This is not an issue in normal use. However, the ULC-621 listing means the chimney system (including the air space) has been tested to survive three 30 minute chimney fires at 2100F, without torching the adjacent walls. Put vermiculite into the air space, and the wall will burn. I have seen photos of where this has happened.<br><br></div>Norbert<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 3, 2014 at 9:43 AM, <span dir="ltr"><<a href="mailto:conservationarchitect@rockbridge.net" target="_blank">conservationarchitect@rockbridge.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto;">
<div dir="ltr">
<div dir="ltr">
<div style="font-size: 10pt; font-family: Arial;">
<div><font face="Times New Roman" size="4">Alan</font></div>
<div><font face="Times New Roman" size="4"></font> </div>
<div><font face="Times New Roman" size="4">How tight were the openings into this
closed loop fireplace? This may be acceptable to my client.
</font><a href="mailto:.6ach@50pa" target="_blank"><font face="Times New Roman" size="4">.6ach@50pa</font></a><font face="Times New Roman" size="4">
is impressive with these handicaps. What would your recommendation for
interior cloths dryer be?</font></div>
<div><font face="Times New Roman" size="4"></font> </div>
<div><font face="Times New Roman" size="4">As an alternative to the insulated
chase, could you define a space up to a triple wall chimney that has the
specified clearance to combustible material filled with non combustible
insulation such as vermiculite. </font></div>
<div><font face="Times New Roman" size="4"></font> </div>
<div><font face="Times New Roman" size="4">Thanks</font></div>
<div><font face="Calibri" size="3"><font face="Times New Roman" size="4">Eli</font>
</font></div>
<div> </div>
<div style="font-size: small; text-decoration: none; font-family: Calibri; font-weight: normal; font-style: normal; display: inline;">
<div style="FONT:10pt tahoma">
<div> <br></div></div></div></div></div></div></blockquote></div>
</div>
_______________________________________________<br>Greenbuilding mailing list<br>to Send a Message to the list, use the email address<br><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br>http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</blockquote></div><br></div></body></html>