Hi all,

Is there a place in 90.1-2007 that defines certain numbers for Baseline pressure drop?
(I've gone through the archives and addendum ac to 90.1-2004 that was incorporated in the 2007 version and can't seem to find it, because I guess there isn't such a thing as "baseline pressure drop" definition)

Can somebody chime in on the analogy for the baseline pressure drop indirectly expressed through the Appx G Table-3.1.2.9 Baseline Fan Brake Horsepower:
-I choose the type of the system (Constant or Variable)
-Per note below Table G3.1.2.9 I go back to Section 6.5.3.1.1 and define the "A" parameter in the calc
-I add all the pressure drop adjustments that apply to my applicable device for that particular system and add them to the baseline system fan power to get credit when compared to my proposed case fan power(pressure drop)?

...where I'm going with this; it's a bit confusing to use the baseline CFM and pressure drop adjustments from the proposed model to get the total baseline brake horsepower or maybe it's just Friday..

Thanks,
Nikola