Confirm the project uses the 2025 OEESC, mandatory since July 1, 2025, and which compliance path it follows, then trace envelope assemblies, fenestration, mechanical efficiency and controls, and lighting power and controls through the drawings, schedules, and compliance forms. AI can flag conflicts; the designers and building official decide compliance.
What does the OEESC cover?
The Oregon Energy Efficiency Specialty Code is Oregon’s commercial energy code, adopted by the Building Codes Division with the Construction Industry Energy Board and published as Chapter 13 of the Oregon Structural Specialty Code. Residential energy is in Chapter 11 of the Oregon Residential Specialty Code instead.
The Oregon Building Codes Division states that the 2025 OEESC is based on ASHRAE Standard 90.1-2022, took effect January 1, 2025 with a six-month phase-in, and became mandatory July 1, 2025. The division links an online version of ASHRAE 90.1-2022. Checked October 15, 2026. Interim amendments and errata are posted on the same pages; confirm which edition the permit was applied for under.
Model standard checks are in the ASHRAE 90.1 guide. Projects elsewhere may use the IECC, and Oregon houses use the ORSC Chapter 11.
Gather the envelope, MEP, and compliance documents
Collect the energy compliance forms or model report, wall, roof, and floor sections, the window and curtain wall schedules, the mechanical equipment schedules and control sequences, the lighting plans, fixture schedule, and lighting control narrative, and the specifications for insulation, glazing, equipment, and controls.
Compliance forms are often prepared early. Check that their inputs still match the current drawings.
Trace OEESC items through the set
| Review question | Sources to compare | Decision to record |
|---|---|---|
| Edition and path | Code analysis, compliance forms | Confirm the 2025 OEESC and one compliance path across documents. |
| Opaque envelope | Wall, roof, and floor sections, compliance forms, specifications | Match insulation and assemblies to the values the forms use. |
| Fenestration | Window schedule, elevations, compliance forms | Check glazing performance and area match the forms. |
| Mechanical efficiency and controls | Equipment schedules, sequences, compliance forms | Match equipment efficiency and required controls to the forms. |
| Lighting | Lighting plans, fixture schedule, control narrative | Check lighting power and controls agree with the forms. |
| Commissioning and verification | Specifications, compliance forms | Confirm required functional testing is specified. |
Envelope details continue in the insulation specifications guide, and lighting in the lighting controls guide.
Example: compliance forms from an earlier design
Hypothetical example. The OEESC compliance forms for an office building list one glazing product and window area. The current window schedule shows a different glazing product, and the elevations add a curtain wall bay that the forms do not include.
The OEESC compliance forms list a glazing product and window area that differ from the current window schedule and elevations, which add a curtain wall bay. Confirm the glazing and update the compliance documentation.
The architect and energy consultant update the forms to match the current design. The building official decides compliance.
Review Oregon energy documents with Groundbook
Upload the current drawings and specifications to Groundbook, and state the edition, amendments, and review scope in your instructions. Add the Oregon Energy Efficiency Specialty Code edition the project uses from a copy you are licensed to use, where the license permits uploading it, and the jurisdiction’s published amendments. See how Groundbook works with local and licensed codes.
Compare the OEESC compliance forms, wall and roof sections, window and curtain wall schedules, elevations, mechanical schedules and sequences, lighting plans and controls, and specifications. Flag compliance inputs that differ from the drawings and required controls not shown. Use the supplied OEESC and ASHRAE 90.1 and cite both sources.
Groundbook links each potential finding to the sheets and forms involved. It does not run energy models.
Document review does not perform energy calculations or approve compliance. Those remain with the designers and the building official.