Can you guarantee that the completed building will match the performance predicted by the analysis in its day-to-day operations?
- Why or why not?
Like anything, it is nearly impossible for a prediction to be 100% accurate, but specifically when referring to the building energy performance,. In a building’s day-to-day operations, the time the sun rises, and where it hits on the building, as well as most of the heating/cooling operations would typically match the predicted performance. However, there are plentiful factors that could be variable across day to day operations. A good example of this would be if we think about holidays - unless the building sensors such as lighting and plug loads account for this, which most do not, then a typical Tuesday or other day of the week could perform at full electric power when no one is in office due to the holiday. Another example of this would be the post-pandemic work culture, such that many people can work their jobs fully remote so a building is operating at 100% power for a smaller group of people.
When choosing settings for each of the building performance factors, should you always choose the setting that gives the absolute lowest predicted energy use?
When choosing settings for each of the building performance factors, you should not always choose the absolute lowest predicted energy use beause it may not be comfortable for the occupant or reasonable. For example, in choosing window to wall ratios, the highest possible percentage may provide the lowest energy use, however this would result in a building that could be extremely hot or provide unreasonable glare for the occupants. Another big reason to not choose the setting that gives the absolute lowest predicted energy use would be the cost that is associated with the choice. For example, triple glazing window panels are certainly more efficient than typical windows but they come with a hefty price tag.
How can you use Insight feedback to make design choices regarding materials, lighting, PV, etc.?
You can use Insight feedback to make design choices regarding materials, lighting, PV, etc. by setting your priorities for the project. If the ultimate goal is to be as energy efficient as possible, then materials should shift from concrete and steel to wood or low-carbon concrete, roof surfaces should be designed for PV panels, and the lighting should be mindfully chosen in terms of balancing the natural sun with LED fixtures. If the goal is to create a biophillic feeling space, then sharp edges should be transformed into soft curves, wooden features should be exposed, and the lighting should be as close to natural as possible. Depending on the priorities of the owner of the project and client, the feedback from Insight can help you to hone in on the overall goals of the building.