Hi All,
The Addendum for 90.1-2004 allows to rule out G3.2.1.9 fan
power method in App G for Laboratory buildings with fumehoods exhaust
as mentioned in advanced simulation guide

I have gone through the addendum but want to know what method to apply
to calculate baseline fan power

either just the formula should be changed from 90.1.2004 to 90.1.2007
which accounts for pressure drop adjustments or there is some other
procedure.

Thanks
Sambhav