Question:
USGBC is asking me for a manual calculation on fan power. Can you walk me through how you calculate the fan power for a VAV system for LEED?
Answer:
It’s a pretty straightforward process. However, it does require some bouncing around in ASHRAE 90.1 and that can lead to confusion, so after this walk-through you might simply prefer to use our fan calculator. One of the most complicated parts of the calculation is determining the filter credit. But remember that you should only apply the fan credit if ALL the supply air is filtered. (The workaround is discussed in the...

