SB-12 Energy Modelling in Ontario
HOT2000 performance path energy modelling for OBC 9.36 SB-12 compliance — required when your window-to-wall ratio exceeds 22% — with stamped compliance documentation in 3–5 business days.
Get a Free QuoteWhat's Included
- HOT2000 energy model built from your architectural and mechanical drawings
- Performance path compliance check against OBC 9.36 SB-12 requirements
- Window-to-wall ratio calculation and documentation
- Building envelope assessment — insulation levels, airtightness, thermal bridging
- HVAC efficiency parameter input and optimization
- Compliance recommendations when initial model fails (envelope or mechanical changes)
- Complete OBC 9.36 compliance report ready for building permit submission
- Coordination with architect or builder on specification adjustments if needed
Turnaround
3–5 business days from receipt of architectural drawings. Rush service is available for urgent projects.
Deliverables
- HOT2000 model file
- OBC 9.36 SB-12 Performance compliance report (stamped PDF)
- Window-to-wall ratio calculation sheet
- Compliance summary for building permit submission
- Optimization recommendations report (if initial model requires changes)
Codes & Standards
- OBC 2024 — Section 9.36 — Energy Efficiency
- SB-12 — Supplementary Standard to OBC for Energy Efficiency in Building Envelopes
- NRCan HOT2000 v11 — Energy simulation software
- ASHRAE 90.2 — Energy-Efficient Design of Low-Rise Residential Buildings (reference)
Who This Is For
Architects, custom home builders, and developers of Ontario residential projects where the window-to-wall ratio on any facade exceeds 22%, triggering the SB-12 Performance path requirement. Also relevant for projects targeting energy performance beyond the OBC prescriptive minimum.
Frequently Asked Questions
When is SB-12 Performance path modelling required?
SB-12 Performance path energy modelling is required under OBC 2024 Section 9.36 when the window-to-wall ratio of any above-grade wall exceeds 22%. It is also an option for projects that cannot meet SB-12 prescriptive requirements through envelope upgrades alone.
What software do you use for energy modelling?
We use HOT2000, the NRCan-approved simulation software accepted by Ontario building departments for SB-12 Performance path compliance.
What happens if the initial model doesn't pass?
We provide specific, actionable recommendations — typically insulation upgrades, window specification changes, or HVAC efficiency improvements — and re-run the model until compliance is achieved. This is included in the service.
Can energy modelling help reduce construction costs?
Yes. Sometimes a modest mechanical efficiency upgrade (e.g., a higher AFUE furnace or better heat pump rating) allows you to use less expensive window glazing while still passing the energy model. We optimize for cost-effective compliance, not just compliance.