Hello,

I've searched the forum but haven't found a definite answer. I have building consisting of 86% existing and 14% addition and I would like to calculate the weighted average energy savings percentage and points for the project. I need to show a step-by-step calculation on how I can achieve this. I would like to do this without using any forms.

For example, if the total combined building achieves 30% cost savings better than ASHRAE 90.1-2007 for new construction, how does my calculation start?

Any help would be very much appreciated. Thank you