Heat Transfer Coefficient R Value Types and Conversions

How to calculate the Thermal Conductivity R-Value of material? And how to do conversions between R-Value in USA and RSI value? Download this Heat Coefficient R-Value for all material types and conversions template that will perfectly suit your needs!

Engineers, Architects and scientists regularly need advanced templates, forms, spreadsheets to perform their calculations. For example, this Heat Coefficient R Value Types and Conversions template which can save you valuable time and can help you with your research and your calculations.

The R-Value is an imperial system unit of measurement (ft2·°F·h/BTU) and the RSI Value is a metric system unit of measurement (m2·K/W). The higher the resistance value, the slower the rate of heat transfer through the insulating material.

Convert an RSI Value to an R-Value, multiply the RSI Value by 5.678.
Convert an R-Value to an RSI Value, divide the R-Value by 5.678.

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RSI-values and R-values for various materials normalized to a one-inch (25.4 mm) thickness. In practice, the values will have been obtained using different methods and thicknesses. Typical values are approximations based on the average of available figures. The last column gives RSI-values normalized to a meter thickness. Clicking on the RSI-value column sorts by the median value of the range and clicking on the R-value column sorts by lowest value. This Sheet contains R-values for the following building materials:

Vacuum insulated panel
Silica aerogel
Polyurethane rigid panel (CFC/HCFC expanded) initial
Polyurethane rigid panel (CFC/HCFC expanded) aged 5–10 years
Polyurethane rigid panel (pentane expanded) initial
Polyurethane rigid panel (pentane expanded) aged 5–10 years
Foil-faced Polyurethane rigid panel (pentane expanded)
Foil-faced polyisocyanurate rigid panel (pentane expanded ) initial
Foil-faced polyisocyanurate rigid panel (pentane expanded) aged 5–10 years
Polyisocyanurate spray foam
Closed-cell polyurethane spray foam
Phenolic spray foam
Thinsulate clothing insulation
Urea-formaldehyde panels
Urea foam
Extruded expanded polystyrene (XPS) high-density
Polystyrene board
Phenolic rigid panel
Urea-formaldehyde foam
High-density fiberglass batts
Extruded expanded polystyrene (XPS) low-density
Icynene loose-fill (pour fill)
Molded expanded polystyrene (EPS) high-density
Home Foam
Rice hulls
Fiberglass batts
Cotton batts (Blue Jean insulation)
Molded expanded polystyrene (EPS) low-density
Icynene spray
Open-cell polyurethane spray foam
Cardboard
Rock and slag wool batts
Cellulose loose-fill
Cellulose wet-spray
Rock and slag wool loose-fill
Fiberglass loose-fill
Polyethylene foam
Cementitious foam
Perlite loose-fill
Wood panels, such as sheathing
Fiberglass rigid panel
Vermiculite loose-fill
Vermiculite
Strawbale
Papercrete
Softwood (most)
Wood chips and other loose-fill wood products
Aerated/Cellular Concrete (5% moisture)
Snow
Hardwood (most)
Brick
Glass
Poured concrete
Etc.

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