Hi,

I have a doubt related to the system fan power calculation described in section G.1.2.9.
This section states that "system fan electrical power for supply, return, exhaust, and relief (excluding power to fan-powered VAV boxes) shall be calculated using the following formulas..."
So the formulas present the term "CFMs", where the subscript is for supply.

So, the value that I calculate for the bhp accounts for the total fan power for each system (supply, exhaust, return and relief fans) using the baseline system maximum design supply fan airflow rate?

Or, should I use the formulas for each of the fans, separately, considering the flow through each of the fans?

Thanks,

Luana