We’ve all heard the horror stories about some of the highest rated LEED and BREEAM buildings being some of the worst culprits in terms of actual, operational energy and resource consumption (measured typically in kWh / m2, and several other metrics, provided there is enough data available). When the designers of such buildings are asked why their models differ so dramatically from reality, the answer is almost always the same: the building isn’t used in the way it was designed for.
When asked to explain what that actually means, feedback tends to differ. Sometimes it’s a specific (new / sensitive / not properly commissioned etc.) piece of equipment that doesn’t work as expected. In other cases, the building is used by multiple tenants vs. a single one, other times twice as many people have been crammed into the space etc – but in general terms it all comes down to one stakeholder group: the occupants!