Confused about your building’s energy performance? Here’s how to understand Europe’s new labels

Bartolomiej Pietrzyk/Shutterstock Imagine an apartment that could be teleported across Europe. In Spain, its energy certificate might read D. In Germany, the same apartment could earn a C on a scale that runs to H. In Brussels, it might land on B, one of more than 15 subclasses. In the Netherlands, where the scale climbs to A+, it would look positively mediocre. Same walls, same boiler, same physics, eight different letters. This is not a thought experiment. It is how Europe has rated its…