[Equest-users] Thermal Mass Wall and R-Value

[Bruce Easterbrook]

That doesn't sound right.  Poured 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.
Bruce Easterbrook

On 22/04/2010 10:38 AM, Rob Hudson wrote:
> 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?
>
> -- 
> Rob Hudson
>
>
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