Create the baseline model. Two baseline model calculation methods are available; explore both to determine which one is better for your project:
- Existing Conditions Baseline. This model includes the existing conditions of the building, but all systems must comply with the minimum ASHRAE 90.1-2007 efficiency guidelines. This calculation method is more beneficial for projects located in less-efficient buildings. Savings calculations for this model are adjusted to include only the area within the project scope or building segment.
- Alternative Baseline. This is intended for projects located in energy-efficient or LEED-certified buildings. For buildings that exceed the efficiency guidelines of ASHRAE 90.1-2007, the baseline can be adjusted down to the meet these guidelines. In addition, the calculations include the overall savings of the modeled HVAC system and are not adjusted relative to the project area or building segment. These adjustments are allowed so the project isn’t penalized for being in an efficient, possibly LEED-certified, building.
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