The aim was to ensure that the energy consumption is below the average for similar office buildings. The two most visible interventions is the efficient lighting systems and the double glazing. The lighting system has three characteristics that ensure efficiency. The lights themselves are designed to reflect as much light into the room and use highly efficient tubes. Further there are both occupancy and ambient light level sensors to provide efficient light levels at all times. Double glazing reduces heat uptake through solar thermal insulation when it is hot outside and through radioactive heat losses when the outdoor temperatures are low.