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15 mar 2024 · Calculating the Effective R-Value provides a more accurate representation of an insulation material’s current performance. It factors in real-world conditions that may reduce the material’s insulating properties, offering a realistic view of its thermal resistance.
R-Value Calculation Examples. Let’s take a look at some examples of R-Value calculations for different individuals to see how it works in practice. As you can see, Bob’s attic has the highest R-Value of 32, while Lisa’s walls have the lowest R-Value of 11.43. These values were calculated using the R-Value formula mentioned above.
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