So I think we’re commonly seeing ambitions for much more efficient operational performance than yours (33kBTU/sqft/year = ~100kWh/m2/year; we’re talking 55kWh/m2/year, looking at the base build)
And our grid is currently less than half that carbon intensity, if we’re to believe UK grid data; 1300lbCO2e/MWh = ~590gCO2e/kWh, whereas UK grid carbon intensity in the next few days is averaging 230gCO2e/kWh See live tracker: Carbon Intensity