The default R-values for wall (assembly) are referred from ASHRAE table 5.5-1. Cove.tool will automatically populate the R-values based on location of the project assuming the steel framed walls for all commercial building types except small office (wood framed walls).

  • Wall R-Value: This measures how effective the wall assembly is as an insulator. The higher the R-value, the greater the insulation performance. Range for Typical R-value are Low Performance Insulation (R-5 through R-13), Average Performance (R-14 through R-25), High Performance (R-26 through R-50). Wall R-values will be applied to the entire project, if you have more than one type use an area weighted average method to calculate a single value.
  • Wall Emissivity: The emissivity is defined as the fraction of energy being emitted relative to that emitted by a thermally black surface (a black body). Most objects have an emissivity between 0 and 1. The surface of a perfect black body has an emissivity of 1, objects with lower emissivities emit radiation at correspondingly lower rates. Cove.tool is referring ASHRAE Handbook – Fundamentals version 2009 for wall emissivity value. List of wall emissivity values can be found here
  • Wall Area - N: Total wall area for the North side of the building.
  • Wall Area - NE: Total wall area for the North-East side of the building.
  • Wall Area - E: Total wall area for the East side of the building.
  • Wall Area - SE: Total wall area for the South-East side of the building.
  • Wall Area - S: Total wall area for the South side of the building.
  • Wall Area - SW: Total wall area for the South-West side of the building.
  • Wall Area - W: Total wall area for the West side of the building.
  • Wall Area - NW: Total wall area for the North-West side of the building.

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