The user is provided with a number of options to assist in entering proposed construction assembly data appropriate to the construction type (continuous insulation, frame, curtain wall etc.) so that thermal bridging is properly accounted for (as B 3.1.1.7).
For continuous insulation and frame constructionassemblies the NECB 2017 Navigator entries facilitate assembly data entry via the VE’s construction tool or the construction tools composite layer / wizard options.
VE’s construction tool: isothermal planes:
VE’s construction tools composite layer: isothermal planes & parallel path:
For more complex constructionassemblies, such as metal & glass curtain walling, the user should use laboratory testing or third party 3D computer analysis (such as LBNL Window) to determine overall transmittance which would then be entered via the VE’s construction tools.
