⚡ Energy Code

Energy Code Compliance Calculator

Check HVAC system energy code compliance across Canadian and US jurisdictions. Compare prescriptive requirements for equipment efficiency, ductwork, and controls.

🏠 Building Type

📋 Code Cycle Reference

✅ System Features Checklist

HVAC equipment meets or exceeds minimum efficiency requirements for its category Ductwork in unconditioned space is insulated to minimum R-value requirement Ductwork is sealed and duct leakage tested per applicable requirement Programmable/setback thermostat or equivalent automatic control installed Economizer installed on qualifying commercial cooling equipment (if applicable) Hydronic piping insulated to minimum requirement (if applicable) System commissioning and functional testing documentation completed

⚡ Energy Code Compliance Results

Pending

Prescriptive Checklist Status

Code Reference Summary

Full Assessment Summary

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How to Use the Energy Code Compliance Calculator

Select the building type

Residential and commercial buildings face different code requirements and checklist items, since commercial systems typically have more extensive control and economizer mandates.

Select the applicable code cycle

Choose the specific code edition your jurisdiction has adopted. Confirm this with your local building department, since jurisdictions often lag behind the model code's publication date.

Check off completed system features

Work through the prescriptive checklist, checking each item your HVAC system design and installation actually satisfies. Leave unchecked any item not yet completed or not applicable.

Review the compliance summary

The results show which checklist items are satisfied and highlight gaps needing attention. Use the NECB compliance calculator or IECC compliance calculator for the detailed code-specific requirements behind each checklist item.

Understanding Energy Code Compliance Paths for HVAC Systems

Energy codes govern far more than just equipment efficiency ratings, extending into ductwork insulation and sealing, control system requirements, and system commissioning documentation. Understanding the full scope of typical prescriptive requirements, and how they differ from the performance-based alternative, helps ensure a project's HVAC design and installation pass code review the first time rather than triggering costly change orders during inspection.

Prescriptive path: a fixed checklist approach

The prescriptive compliance path requires meeting a defined list of individual requirements without needing whole-building energy modelling. This approach trades design flexibility for simplicity and predictability: if every item on the applicable checklist is satisfied, the project is compliant, full stop. This makes prescriptive compliance attractive for straightforward residential and small commercial projects where the added complexity and cost of energy modelling isn't justified by the design flexibility it would provide. The trade-off is that prescriptive compliance doesn't allow underperformance in one area to be offset by overperformance in another, since each individual requirement must be met independently regardless of how the overall building performs.

Performance path: whole-building energy modelling

The performance compliance path instead requires demonstrating, through an approved energy simulation, that the proposed building's total annual energy use doesn't exceed that of a reference baseline building meeting minimum prescriptive requirements. This approach offers genuine design flexibility: a design team might choose lower-efficiency HVAC equipment while compensating with a superior building envelope, or vice versa, as long as the total modelled energy outcome meets the target. Performance compliance requires more upfront analysis and modelling expertise but can be the only viable path for architecturally ambitious designs that can't meet every individual prescriptive requirement, or the more economical path when a specific trade-off between systems produces a better overall project outcome than rigid prescriptive compliance would allow. Use the energy model compliance calculator for a preliminary performance path estimate.

Ductwork requirements beyond equipment efficiency

Energy codes increasingly recognize that equipment efficiency alone doesn't determine actual system performance, which is why ductwork insulation and sealing requirements have become standard prescriptive checklist items. Ducts running through unconditioned attics, crawlspaces, or garages must meet minimum insulation R-values to limit conductive heat loss and gain, and duct leakage testing has become mandatory in most current code cycles to verify the system doesn't waste conditioned air through unsealed joints. Use the duct leakage compliance calculator to verify a specific test result against the applicable threshold for your project.

Control system and economizer requirements

Control system requirements aim to ensure HVAC systems don't run unnecessarily when spaces are unoccupied or when free cooling from outdoor air is available. Programmable and setback thermostats, now standard in most residential requirements, automatically reduce heating and cooling demand during unoccupied periods without requiring occupant intervention. Economizer requirements, which mandate outdoor-air-based free cooling capability on qualifying commercial rooftop and packaged units above a specified capacity threshold, capture significant energy savings in climates and building types where outdoor conditions frequently allow cooling without running mechanical refrigeration. These requirements generally scale with building complexity and system size, meaning large commercial projects face a more extensive control checklist than typical residential construction.

Code cycle timing and jurisdictional lag

Model energy codes like the National Energy Code of Canada for Buildings and the International Energy Conservation Code update on a multi-year cycle, but the specific edition actually enforced in your project's jurisdiction depends on when that jurisdiction formally adopted the updated model code, which often lags months or years behind the model code's publication. This means confirming your project's applicable code edition directly with the local building department, rather than assuming the most recently published model code edition applies, is an essential first step in any energy code compliance process.

Frequently Asked Questions

The prescriptive path requires meeting a fixed checklist of individual component requirements, such as minimum equipment efficiency, duct insulation levels, and specific control features, without needing any whole-building energy modelling. The performance path instead requires demonstrating that the proposed building's total energy use, calculated through an approved energy model, does not exceed that of a reference baseline building meeting minimum code requirements. Prescriptive compliance is simpler to verify and document, while performance compliance offers design flexibility to trade off between different systems, provided the total energy outcome meets the target. Use the energy model compliance calculator to explore the performance path.

Economizer requirements, which mandate that certain rooftop and packaged cooling units use outdoor air for free cooling when conditions allow, typically apply to commercial HVAC systems above a specified cooling capacity threshold rather than residential equipment. Most energy codes exempt residential-scale equipment from economizer requirements entirely, focusing this requirement on larger commercial rooftop units where the energy savings potential from economizer operation is more significant relative to the system size.

Common energy code control requirements include programmable or setback thermostats capable of automatically adjusting temperature during unoccupied periods, demand control ventilation that modulates outdoor air based on measured occupancy or CO2 levels in appropriate spaces, and automatic shutoff controls that stop HVAC operation outside scheduled occupied hours in commercial buildings. Specific requirements vary by building type, system size, and the applicable code edition, with commercial buildings generally facing more extensive control requirements than residential construction.

Most Canadian and US energy codes update on a multi-year cycle, commonly every three years for model codes like the National Energy Code of Canada for Buildings and the International Energy Conservation Code, though provincial and state adoption of a new edition often lags behind the model code's publication date. This means the code cycle actually in effect for a specific project depends on both the model code edition and when your specific jurisdiction adopted it, which can mean a jurisdiction is still enforcing an older code edition even after a newer one has been published nationally. Always confirm the current adopted edition with your local building department.