Dear all,

My question concerns the issue “EA prerequisite 2-Minimum Energy Performance”, especially the following requirements :
“Compliance with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4) in Standard 90.1-2007 (with errata but without addenda1) or USGBC approved equivalent”. Theses mandatory provisions are focused on :

5.4 Fenestration and doors,
6.4 and 7.4 Equipment efficiency,
8.4 Power,
9.4 Lighting control / space control,
10.4 Electrical motors efficiency.

Due to technical differences between European and US design practices, some requirements are very difficult to implement. For instance, requirement “8.4-Power” requires a maximum of 2% voltage drop
at design load for feeders and a maximum of 3% voltage drop for branch circuits.

Basically, the design practice in France considers a 5% maximum voltage drop for all electrical distribution (and a maximum of 3% for lighting) ; it is therefore very difficult to implement this requirement on our project.
(moreover, the project complies with minimum energy performance, due to a gain versus baseline energy costs, which ensures building energy performance).

Does someone have the same kind of problem regarding one of these mandatory provisions 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4 ?

Thanks for your feedback,