Performance paths of building energy standards such as
90.1?s Appendix G, Title 24?s ACM, and RESNET HERS require
modelers to follow ?rulesets? that describe how building
energy models should represent the building design and a
reference model to compare against. These rulesets are
complicated and subject to interpretation. ASHRAE Standard
229P is motivated by the desire to improve the rigor and
consistency of ruleset application, to reduce the cost of
performance?path compliance submittal review, and, in doing
so, to encourage the adoption and implementation of
performance?based codes. Standard 229P defines a schema that
describes the building models in simulation?engine neutral
and ruleset-neutral format. Once simulation software starts
to export this file format, another piece of software called
a Ruleset Checking Tool can automatically compare the
exported files and determine if the rules in the ruleset
were followed. This will significantly reduce the effort for
reviewing simulation-based compliance.

To support this workflow, Standard 229P defines the
following using 90.1-2019 Appendix G as an example:

* The Ruleset Evaluation Schema
* Compliance requirements and tests for building
performance modeling software that exports models in
ruleset evaluation schema format.
* Compliance requirements and tests for a Ruleset Checking
Tool.

Use this link to download a copy of the draft standard and
provide comments:

https://www.ashrae.org/technical-resources/standards-and-guidelines/public-review-drafts

The comment period closes on June 4, 2024.

Jason

Vice-chair of SPC 229 committee

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Jason Glazer, P.E., BEMP, GARD Analytics, 90.1 ECB chair
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