| Re: [GMCnet] Insulating coach [message #229506] |
Tue, 12 November 2013 11:56  |
George DV
Messages: 132
Registered: August 2004
Karma:
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Senior Member |
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R value is a number used in a LINEAR equation to calculate total heat transfer in convective energy. The reciprocal of the R value is used however by us sliderule weenies.
So a R value of 10 would be seen as +++++ 1/10 +++ in the calculation
Take it from there with your ratios.
Secondarily. Remember insulation works on the principal of STAGNANT air.
Fibreglas or whatever only traps air and inpedes its movement!
It is NOT magic
And more is not necessarily bettter
George Delvecchio
Beautiful upstate NY
Recouperating
76 Glenbrook
Sent from my Verizon Wireless Device
"A." <markbb1@netzero.com> wrote:
>
>
>SeanKidd wrote on Tue, 12 November 2013 04:21
>> adding insulation (R-7 to R-10) in your coach is a lot of effort for a 2% gain...
>We are going to continue to disagree here.
>
>If you could post a URL to a source that purports that R-1 cuts heat transfer by 50%, I can take a look at it. But for now, I reject your numbers. And there should be no argument that doubling the R-value halves the heat transfer. You CAN reach a point where doubling the insulation only cuts your energy consumption by 2%, but that 2% point is closer to going from R-30 to R-60, not going from R-7 to R-14.
>
>If you approached that point in single digits of R-value, then the ROI on construction insulation would be decades or centuries. And we know that is not the case.
>
>The rest of your post is completely accurate.
>--
>'73 23' Sequoia For Sale
>'73 23' CanyonLands For Sale
>UA (Upper Alabama)
>CanyonLands most likely for a parts coach. Sequoia being restored to service.
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