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

[Carol Gardner]

I agree with Karen. I have another thought though: could this be an
insulating concrete form wall (ICF) wall? Google ICF for info.

Carol

On Thu, Apr 22, 2010 at 2:39 PM, Karen Walkerman <kwalkerman at gmail.com>wrote:

> 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.
>
> --
> Karen
>
> On Thu, Apr 22, 2010 at 12:30 PM, Rob Hudson <rdh4176 at gmail.com> wrote:
>
>> That is the answer i was expecting to here.  thanks for your input
>>
>>
>> On Thu, Apr 22, 2010 at 12:27 PM, Bruce Easterbrook <bruce5 at bellnet.ca>wrote:
>>
>>>  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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>>
>>
>> --
>> Rob Hudson
>>
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