In Quebec, optimizing a building’s energy performance has become a strategic priority. Energy modelling makes it possible to anticipate consumption, compare scenarios and make informed decisions right from the design stage or during a major renovation.
What is energy modelling and what is it for?
A simple, clear definition
Energy modelling means building a digital model of a building in order to simulate its energy consumption over a full year. The model captures the envelope (walls, roof, windows), the orientation and the materials, along with mechanical systems such as heating, ventilation and air conditioning.
Its purpose is to anticipate energy performance from the design stage or as part of a renovation. Rather than relying on general estimates, it lets you compare scenarios and settle on the most efficient and cost-effective choices.
The difference between an energy audit and energy modelling
An energy audit analyzes the actual performance of an existing building based on utility bills, equipment inspections and occupancy patterns.
Energy modelling, on the other hand, is about prediction. It lets you test improvements virtually (insulation, replacing the heating system, adding a heat pump or a geothermal system) before you invest. The audit observes; the model compares and projects.
Why it matters in the Quebec context
Quebec’s harsh winters create heavy heating demand, and the temperature swings between seasons put buildings to the test.
Energy modelling lets you tailor the design to local climate realities, reduce heat loss and plan the shift toward higher-performing solutions such as geothermal energy. The Gouvernement du Québec also highlights the importance of properly measuring building energy performance in its official resources.
Quebec’s climate and energy performance
A poorly insulated envelope or badly sized systems can drive operating costs sharply higher. Simulations make it possible to optimize insulation, fenestration and mechanical equipment, improving durability and keeping energy spending stable.
How energy modelling works
Gathering building data
The first step is to assemble architectural drawings, material properties, mechanical systems and occupancy profiles. The more accurate the data, the more reliable the results.
For an existing building, on-site measurements may be needed to validate the information.
Building the digital model
Specialized software is used to create a virtual model of the building. Recognized tools, including those presented by Natural Resources Canada in its section on modelling tools, help structure these analyses and support professionals in their simulations.
Every component is built into the model so the building’s energy behaviour can be simulated on an annual basis, taking Quebec climate conditions into account.
Scenario analysis and optimization
One of the main advantages of energy modelling is the ability to compare scenarios. You can assess the impact of better insulation, a change of heating system or the addition of a higher-performing technology.
The results yield estimates of annual consumption, operating costs and emission reductions. This approach supports informed decision-making and lowers financial risk.
Lower costs and decarbonization goals
By optimizing technical choices, energy modelling helps reduce energy spending over the long term. It also supports decarbonization goals by identifying the least energy-intensive and most sustainable solutions.
Which projects call for energy modelling
New construction
On a new construction project, energy modelling proves useful from the earliest design phases. It guides architectural and mechanical decisions before the work begins.
That makes it possible to aim for high performance without costly changes once the site is active.
Major renovations
For substantial renovations, energy modelling helps set priorities. It identifies the most cost-effective measures and quantifies the expected gains.
This analysis is particularly valuable for existing buildings looking to improve their overall performance.
Commercial and institutional buildings
Commercial and institutional buildings often consume a great deal of energy. Modelling makes it possible to analyze these complex buildings and optimize their performance.
Even a modest improvement can add up to significant savings over several years.
Concrete benefits for owners and developers
Informed decision-making
Energy modelling turns assumptions into measurable data. Decision-makers get clear indicators for comparing options and planning their investments.
Better-targeted investments
By zeroing in on the most effective measures, it avoids unnecessary spending. Investments are guided by hard numbers rather than approximations.
Greater occupant comfort
A high-performing building delivers steadier temperatures and better air quality. Modelling helps strike the right balance between energy performance and comfort.
Energy modelling and regulatory compliance
Construction Code requirements
Some standards require a demonstration of energy performance for new construction or major renovations.
Energy modelling documents the technical choices made and demonstrates compliance with the applicable requirements.
Certifications and energy performance
Several environmental certification programs rest on energy performance criteria. Modelling is a key tool for meeting those standards and adding value to a real estate project.
How much does energy modelling cost?
Factors that influence the price
Cost varies with the size of the building, its complexity, the level of detail required and the objectives of the mandate. A large commercial project calls for more analysis than a simple building.
Return on investment
Although it represents an upfront investment, energy modelling often generates substantial savings over the medium and long term.
By heading off design errors and optimizing systems, it lowers future spending and improves the overall profitability of the project.
How to choose an energy modelling expert
Technical skills to look for
An expert must be fluent in energy simulation software and understand the principles of building performance. They also need to interpret the results and turn them into concrete recommendations.
Experience in the Quebec context
Knowledge of the climate, the standards and construction practices in Quebec is essential. An experienced professional will adapt the solutions to local realities.
Conclusion
Energy modelling is a strategic tool for designing and optimizing buildings in Quebec. It makes it possible to forecast consumption, analyze different scenarios and make informed decisions.
For owners and developers, it is an essential lever for reducing costs, improving comfort and securing long-term performance.
Frequently asked questions (FAQ)
Is energy modelling mandatory in Quebec?
It is not mandatory across the board, but it can be required for certain projects or certifications. It is strongly recommended for any initiative aiming at high energy performance.
What is the difference between simulation and modelling?
Modelling is the creation of the building’s digital model. Simulation is the analysis of scenarios based on that model.
How long does energy modelling take?
The timeline depends on the complexity of the project. For a mid-sized building, the process can run over several weeks, including data collection, modelling and analysis of the results.
Further reading
