Efficiencies for Packaged VAV with Reheat

As HVAC system for baseline I have to model System 5 - Packaged rooftop VAV with Reheat. I wonder what efficiencies I have to consider for the different components. For the fan motor efficiency I have to use Table 10.8 of ASHRAE 90.1. In the calculation of the brake horsepower for the baseline fan system of Example G-J’ of the “User’s Manual” parameter A is supposed equal to 0, probably because pressure drops are considered equal to 0 (see tables 6.5.3.1.1A and 6.5.3.1.1B). Can I consider for the baseline model A equal to 0 or shall I make some further consideration? For the cooling system (direct expansion) I would use Table 6.8.1A. Which “Equipment Type” and “Subcategory or Rating Condition” shall I consider? For the heating system (hot-water fossil fuel boiler) I would use Table 6.8.1F “Boilers, hot water” -> “gas-fired” (the boiler of the actual building is fueled by natural gas). Any corrections or suggestions, please? Best Regards