Hello all,
I received USGBC comments for my model asking to input C-Factor values and
F-Factor values for my underground walls and slab on grade floors. However,
when I went back to my model to adjust the properties of the underground
walls and the floors, I cannot change those fields. Any suggestions?
Thanks
Justin
Justin, did you check 90.1 Appendix A?
Arpan,
I know I am suppose to change my F Factor to .73 and C Factor - 1.14 for
non residential building in climate zone 4A. I am having issues with
actually changing the properties of the materials to reflect this. All of
my underground walls wont allow me to input any values.
If you look at Table A6.3, you'll see that an F-factor of 0.73
corresponds to an unheated slab with no insulation. So maybe you don't
have to change anything?
Isn't the idea for the C-factor that you use Tables A3.1B and C to
determine the corresponding U-value based on the construction and
C-factor requirements?
I could be doing this all wrong, but that's what I usually do.
James Hansen, PE, LEED AP