Under the 90.1 Performance Rating Method (PRM), the performance of the baseline building has to be based on the average of 4 separate rotations of the baseline building. This makes sense for new construction projects, as it makes the design team consider their choice of building orientation.

In the case of a buidling that is existing, such as a 100% gut-and-renovate project, there is no opportunity to change the orientation of the building. Is it then appropriate NOT to rotate the baseline building 4 times to generate its average performance?