Some features of 90.1-2019 Appendix G that have not yet been implemented into the baseline automation are summarized below.
| System | Item | Baseline Model vs. Proposed Model | Notes |
|---|---|---|---|
| HVAC components | Humidification | Same as proposed model in the tool. In some cases, the baseline is required to be changed to adiabatic humidification. | This has not been implemented |
| Humidification | For constant volume systems, Appendix G indicates that only 25% of the system reheat energy shall be included in the budget building performance | This is not yet implemented. It must be handled via post-processing, or an EMS applied to the Baseline model. | |
| SWH | Where service water heater systems in the user model are comprised of multiple distributed systems, the Appendix G model is required to use a single central system. | The conversion to a central system has not yet been implemented. | |
| Design Ventilation Rates | For models where design ventilation rates are greater than that required by code, then the rules of Appendix G state that the Baseline ventilation rate shall be based on the building code and will be lower than the user model. | The ability to model this difference has not yet been implemented. | |
| DES | Some Appendix G requirements for district energy systems have not yet been implemented. | ||
| Lab exhaust fans | The baseline requirement has not yet been implemented where lab exhaust fans must be modeled as constant horsepower, reflecting constant-volume stack discharge with outdoor air bypass. | ||
| Equipment | Transformer Efficiencies | Baseline transformer efficiencies have not been implemented. | |
| Motor Efficiencies | Efficiency requirements for motors serving miscellaneous electrical equipment have not yet been implemented. | ||
| Commercial refrigeration equipment | Efficiency requirements for commercial refrigeration equipment have not yet been implemented. |