We're working on a 40,000 sf existing building undergoing significant interior renovations and lighting upgrades, but will be using the existing mechanical system. We will also be adding 40,000 sf with new mechanical serving the addition. Do we need to separate energy use and show minimum savings of 14% in the new addition and 7% in the renovated portion? Or do we base our overall energy cost savings for the 80,000 sf project on the percentages indicated for Existing Building Renovations?