We have a project that consists of two connected buildings: an admin building and a factory building. The total area for the buildings is greater than 150,000 sq ft, therefore system 8 applies to the baseline case model. Unfortunately, our proposed system uses air cooled chillers and we are having a hard time achieving the required savings.

According to the USGBC, projects outside the U.S. may use an alternative standard to ANSI/ASHRAE/IESNA Standard 90.1-2007 if it is approved by USGBC as an equivalent standard using the process located at www.usgbc.org/leedisglobal.

The above link is broken, and we cannot find anything on the USGBC website that gives guidance on alternative standards to ASHRAE 90.1-2007. So my question is, are there any approved alternative standards to ASHRAE 90.1-2007 for international projects? Has anyone successfully submitted an energy model using a different standard? On another note, is it even possible to achieve the required savings, without using water-cooled chillers, if your baseline model uses system 8 - VAV with PFP Boxes?

Your feedback is greatly appreciated.

-Michael Aghabi