How Building Design Choices Impact Energy Performance
See how changes to walls, windows, heating systems, and other building components influence energy use and emissions for representative building types in St. John's. This tool supports transparent, data-driven decision-making for new development.
Four steps to explore the impact of building design on energy use, GHG emissions and upfront cost
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Potential energy savings
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House types to explore
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Performance tiers
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Upgrade combinations
Pick your house type
Choose from 9 building archetypes common in St. John's
Building envelope
Choose insulation level of wall, ceiling and windows
Heating & hot water
Pick your heating system and water heater
See your savings
Find out how much energy, money, and carbon you could save
Choose your house type
Select the type of building that best matches yours to see how upgrades could save you energy and money.
Detached Houses
Single-family houses from small to large
Multi-Unit Houses
Attached houses with shared walls
Apartment Buildings
Multi-storey residential buildings
About the data
This tool is powered by over 446,000 building energy simulations performed using HOT2000, Canada's standard residential energy modeling software. The simulations cover 9 building types common in St. John's and were conducted by Dr Energi Inc. for the City of St. John's Energy Advisory Working Group.
Results are estimates based on simulations. Actual performance may vary based on construction quality, occupant behavior, and local conditions.
Learn more at drenergi.ca