Keeping vfd specifications in Division 15 (instead of Division 16) may prevent potential pitfalls, including some found when installing vfd's in motor control centers.
More equipment that ever (including vfd's) in buildings means more harmonic distortion. A couple of remedies can reduce the risk while preserving efficiency.
The most advanced bas system is still only as good as the information it collects. Here's a primer on how the traditional datalogger can monitor system performance.