Calculating the required REC's

This is related to Re-certification. We purchased 24 months of RECs during our initial certification. We have not determined when our next performance period will end, now or in the 5th year. However the 1st 24 month block of RECs is set to expire soon. Can we simply utilize the Total Energy kBTU, (converted to mBTU), as identified in our most recent Energy Star SEP, (Dated Nov 2010) to determine the amount needed to meet our goals? Assume we want to capture 100%, simply double the Total Energy mBTU for the next 24 month block? Thanks