Zero Tool 

Architecture 2030 developed the Zero Tool so that regional average Baseline EUIs for projects could continue to be calculated using CBECS 2003 once EPA’s Target Finder calculator switched to the 2012 CBECS. For consistency of reporting for the AIA 2030 Commitment program, and to reduce potential “baseline confusion”, the AIA 2030 Commitment has incorporated the Zero Tool with the DDx as the recommended “Define Baseline” approach for projects.

The Zero Tool replicates, as well as streamlines, the calculation procedures that were used by ENERGY STAR Target Finder. The DDx Baseline EUI calculation process using this recommended approach remains the same:

  • Select “Define Baseline: Zero Tool”

  • A default regional baseline EUI value is displayed on the “Baseline” field in section 3 and was calculated using basic project information and defaults from the Zero Tool.

  • Optional: To provide additional detail to the Zero Tool baseline, there are two approaches.

    • Open the “Optional Inputs” dialogue, complete all input fields for each use type, and then select “Calculate”.

    • Go to the Zero Tool directly and then fill in the baseline by selecting “Other”.


Additional Information:

ENERGY STAR Target Finder

Like the DDx, ENERGY STAR Target Finder is a tool to set baselines and targets. However, as of August 2018, baselines used in ENERGY STAR Target Finder were updated to CBECS 2012. Because Zero Tool uses a very similar methodology to Target Finder but with the CBECS 2003 baseline consistent with 2030 Challenge and AIA 2030 Commitment, it is now the recommended approach to setting a baseline pEUI for projects.

AIA still recommends referencing ENERGY STAR Target Finder for projects interested in eligibility for Designed to Earn the Energy Star Certification, and as another method to understand how a project’s predicted performance is benchmarked against the existing building stock.

More information about updates to ENERGY STAR Target Finder can be found here.