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Posted by aemeijers on August 1, 2007, 9:37 pm
> On Aug 1, 12:44 pm, rdad...@panix.com (Dick Adams) wrote:
>> The 5-pane Bow Window in my house needs to be
>> replaced. The offer on the table is for panes
>> that have an R rating of 25, but for some
>> reason the R rating of the entire window is 4.
>>
>> What does this mean?
>>
>> Dick
>
> The panes are not R25, no window glass is. Its maybe a r3.5 for dual
> pane LowE. Its likely U.25 the inverse of R value. R4 is possible. Go
> to www.energystar.gov to learn about ratings.
>
When I saw the subject header, my first thought was 'close the curtains,
then the window won't be R-rated'.....
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