Hi Mike -
Thanks for your input.
Here are 2 plots from our study:
-The top being the final design that was an adaptive reuse, reusing much of the existing structure, but still providing additional concrete/steel, and enclosure improvements
-The bottom being a hypothetical new build, that demo’d the existing, and rebuilt everything from scratch
-Zero Carbon Grid by 2050 (with incremental reductions in-between now and then, but starting at 1300 lbCO2e/MWh)
-33 EUI (kbtu/sqft/yr)
Again - my takeaway is even with a grid that is decarbonizing, a (mostly) electrified building on a dirty grid will emit A LOT of ghg emissions up until the zero-carbon point, enough to tip the scale. Too much has been emitted by the time the grid reaches zero-carbon.