<div>The best thing to do is model the actual wall construction, not just an equivalent R-value, then you will get both the thermal resistive and the mass effect properties in the model.<br></div><div><br></div><div>--</div>
<div>Karen</div><br><div class="gmail_quote">On Thu, Apr 22, 2010 at 12:30 PM, Rob Hudson <span dir="ltr"><<a href="mailto:rdh4176@gmail.com">rdh4176@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
That is the answer i was expecting to here. thanks for your input<div><div class="h5"><br><br><div class="gmail_quote">On Thu, Apr 22, 2010 at 12:27 PM, Bruce Easterbrook <span dir="ltr"><<a href="mailto:bruce5@bellnet.ca" target="_blank">bruce5@bellnet.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">
<div bgcolor="#ffffff" text="#000000">
<font face="Times New Roman, Times, serif">That doesn't sound right.
Poured</font> concrete has an R-value around 0.08/inch. When
"effective" is used commercially it normally is a hocus pocus addition
for the mass effect but shouldn't be much more than 10%. eQuest would
calculate it as a lag effect based on the mass, so a steady state value
would be most appropriate.<br>
Bruce Easterbrook<div><br>
<br>
On 22/04/2010 10:38 AM, Rob Hudson wrote:
</div><blockquote type="cite"><div>When creating a model, i noticed that the R-value of the
concrete i am using is the "effective" R-value, rated at 22. Should i
use this or should i ask the concrete manufacturer for a steady-state
R-value which will be much more accurate based on the materials?<br clear="all">
<br>
-- <br>
Rob Hudson<br>
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<br></blockquote></div><br><br clear="all"><br></div></div>-- <br><font color="#888888">Rob Hudson<br>
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