We are submitting a museum bldg and have had confirmation from GBCI that we can use Case 2 - historical data to compare against. My question is when completing the information under the ASHRAE Level 1 audit, the LEED credit form asks that you provide comparative information for energy use intensity, cost, demand, & savings. Because we have already established that there are no other similar buildings in the CBECS data base, how do you make the requested comparison.