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To calculate the insulation R-values that are equivalent to the required U-factors for different roof assemblies, the code user can use CEC-approved software or the tables in Joint Reference Appendix 4 (JA4). Appendix JA4 lists the equivalent insulation R-values for a range of common assembly types.
This web page calculates insulation R-values for whole floor, wall and roof constructions based on insulation R-values and the selected construction type.
18 lut 2014 · A team of software developers is offering a free online calculator you can use to compare the thermal performance and cost of a variety of roof, floor, and wall assemblies. Ekotrope is part of a larger application of the same name that the company sells to residential designers.
2. Calculating Equivalent R-values • To calculate the insulation R-values that are equivalent to the required U-factors for different roof assemblies, the code user can use CEC-approved software or the tables in Joint Reference Appendix 4 (JA4). Appendix JA4 lists the equivalent insulation R-values for a range of common assembly types.
7 lis 2022 · When building in California, using the right products makes achieving compliance a much simpler process. Products like the Rmax Durasheath® building envelope insulation are not only compliant under the California Code of Regulations, but also provide sufficient R-values to satisfy Title 24.
This version of the calculator is for small and medium-sized facilities that purchase electricity without a demand charge based on peak monthly load. To compare two non-black roofs, print out results of separate estimates for each vs. a black roof.
Sacramento and most of California are in Zone 3, which requires attic insulation with an R-value between 30 and 60. On this chart, each part of the country is divided into different zones and each zone has a recommended R-value.
