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Poor default handling of low U-value construction insulation #1284

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asparke2 opened this issue Mar 17, 2022 · 0 comments
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Poor default handling of low U-value construction insulation #1284

asparke2 opened this issue Mar 17, 2022 · 0 comments
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@asparke2
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If the minimum allowable U-value of a construction specified in a standard is less than the U-value of the sum of the other layers in a construction, a warning is thrown and the insulation's U-value is not modified. This happens primarily in the older templates, especially DOE 1980-2004 in hot climate zones. The results is unexpectedly high R-values in the walls for models in these climate zones. The behavior is defined here.

Expected behavior: Throw a warning, but instead of leaving the insulation layer in place untouched, remove the insulation layer from the construction entirely, and name the construction with the actual R-value, which is the sum of the films (if included in the standard, as they are for 90.1) and the other layers.

@asparke2 asparke2 self-assigned this Mar 17, 2022
mdahlhausen added a commit that referenced this issue Mar 18, 2022
…values

Fixes #1284 by removing insulation for low U-value constructions
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