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    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #1

    Feb 20, 2008, 08:05 PM
    Specific Definition of R-Value
    Hvac1000 or anyone else who knows.

    A question for general discussion.

    What is the specific definition of the R value rating of insulation. We all know that the higher the R value the better it insulates. That is the answer that I get each time I ask the queation.

    Maybe my question should be how is the rating calculated.

    I suspect that it means there is a certain reduction of heat transfer over a specific time at a given temperature difference. If so what is the time and what is the temperature difference.

    Any thoughts.

    Just trying to avoid starting taxes tonight.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Feb 20, 2008, 08:28 PM
    All you need to know is here

    R-value (insulation - Wikipedia, the free encyclopedia)

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