Differences in energy labels within the same apartment complex explained

Many people think that all apartments in a building automatically receive the same energy label . In practice, however, this often turns out not to be the case. Even within a single complex, labels can vary significantly: from A to C or even worse. Why is that? And what can you do to make your home more energy-efficient?

An apartment's energy rating is determined not only by the building services or the type of glass, but also by its location within the complex . Each apartment loses heat through its front and rear facades , but some apartments also have additional heat loss areas:

• Corner apartments (e.g. no. 1 & 4): lose heat through a side wall and often also through the roof or floor → label C.
• Top apartments (e.g. no. 2): lose additional heat through the roof → label B.
• Ground floor (e.g. no. 5): heat losses through the floor → label B.
• Mid-rise apartments (e.g. no. 6): are fully enclosed, have no additional loss surfaces and therefore often score the best → label A.

In short: the position in the building largely determines the energy performance.