In the 2009 Reference Guide, an alternative path that allows foregoing DES plant replacement through an economic analysis that shows DES replacement is economically unfeasible is clearly stated. No such language exists in the V4 Reference Guide. Therefore, it appears the minimum five-year phase out is required for CFC-using DES plants with no exceptions.
However, the V4 Reference Guide (and LEEDUser) states there is no change from 2009 to V4. Can someone please direct me to the language, or logic, that allows an economic analysis in V4, or is this, in fact, a change from 2009?
Many thanks