Green building has surplus power

Even from the outside, the IRRAD building gives you the feeling of tranquillity. Its dull reddish-brown façade looks like it has yachts sailing across it, except they are all upside down. Later I would find out that the sails of these ‘yachts’ are actually triangular curtains, specially designed to keep the summer sun out and let the winter sun in, one of several key features that makes this a ‘green building.’