white papers

Appliance Energy Modelling – Oleksandra Onisko, Pratus Group 

With the increased stringency of updated energy codes and regulations, consumption on a total building energy level has successfully been reduced. In large part the success of this reduction is a result of advances in lighting, HVAC and building envelope components. The wide-scale availability of high efficiency options of these building components has decreased the energy associated with those regulated end uses. As a result, the unregulated portion of a building’s load now has a greater impact on energy performance than before and thus requires further investigation. One building type of which unregulated loads have a significant impact on their energy consumption is the Multi Unit Residential Building (MURB). For these building types, energy associated with in-suite appliances, typically consisting of refrigerators, dishwashers, ovens, stoves, washers, and dryers represents an ever more significant portion of the total building energy consumption as the other, traditionally energy intensive end-uses, shrink. Current guidelines for modelling in-suite appliances and allowing credit for energy efficient appliances vary. Sustainable Buildings Canada, which is responsible for delivering the Savings by Design incentive program, is interested in exploring how appliance energy is treated by other programs and what the appropriate Equipment Power Density (EPD) is for the Savings by Design program.