The EEFG does not generate perfect ASHRAE code compliant models. It can get you fairly close, but you need to make some changes.
The supply air temperatures used for sizing in the baseline model need to be based on a 20 deg F room setpoint to supply air temp difference.
so if your heating setpoint is 70 deg F, you should be sizing for heating airflow based on a a 90 deg F supply air temp.
if your cooling setpoint is 75 deg F, you should size cooling airflow base on a 66 deg F cupply air temp.
Additional ways the EEFG generated model is not perfectly ASHRAE code compliant:
the envelope construction is more representative of CBECS data and does contain thermal mass. ASHRAE specifies lightweight construction to allow the proposed design to take advantage of increased thermal mass.
Also, if modeling system 7, chilled water VAV with reheat, the minimum flow fraction specified by ASHRAE needs to be changed to 'FixedFlowRate' calculation method and the minimum terminal airflow needs to be hard sized at 0.4 cfm / ft2. The EEFG gives a 'constant' minimum flow method of 30% of the design supply air flow in cooling mode, a typical operation of a VAV box in real life.
ONe other difference is the EEFG generated chilled water plant is a 'Variable Primary Only" pumping system, but the ashrae specified plant should be a 'Constant Primary Variable Secondary Pumping system'
Be sure to read through the specific version of ASHRAE that you are comparing against to be sure that you are following each of the specific rules in appendix G, as these rules vary from year to year. If you are using ASHRAE 90.1- 2004, the sizing for the terminal units is actually based on the reset temperature for some systems, meaning the airflow is higher for this year of the model code.