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EBOM-v4 EAp2:Minimum energy performance

Existing Building Renovation - What to include in energy model

Hello All,

I am working on an energy model for major renovation on a building which has labs and office spaces. We are doing the whole building energy model in an attempt to obtain credits for optimize energy performance. I have a few questions about what I need to include in the energy model.

  1. Do I need to include existing parts of the building that are outside of the project scope? (These include labs/loading docks/electrical rooms)
  2. Do I need to model process equipment such as air compressors or clean steam generators?
  3. Does exterior lighting need to be included?

Thanks

 

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Trista Brown
Project Director
WSP USA
LEEDuser Basic Member
381 thumbs up

Fri, 05/17/2019 - 00:23

Hi Greg, you may have better luck with energy modeling questions in the BD+C forums. Have you tried posting your questions there?

Thu, 04/23/2026 - 10:39

You’re overcomplicating it, energy models for performance credits aren’t “model everything,” they’re model what impacts regulated energy within scope. For a whole-building model, include all conditioned spaces tied to the project, even if not renovated, but don’t waste time detailing untouched areas beyond baseline assumptions; process loads (like compressors or steam generators) are typically excluded unless required or they significantly impact HVAC sizing/loads; exterior lighting is usually included only if it’s part of the project scope or affects total energy calculations. The real mistake is trying to be exhaustive instead of compliant—follow the specific rating system rules (e.g., LEED or local code), because that—not guesswork—defines what actually counts. 

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