The jury found the collective submission of Collective Architecture and Fresh-r the most effective way of ventilating with heat recovery, where comfort is assured at the lowest price, without wasting energy . “Two years ago, Fresh-r won the second prize, in the category for energy retrofits. Then it was a novelty, with a very narrow yet powerful heat exchanger that fits in the outer wall. Now it won the first prize, in the category new residential building. Because we think this should be the norm for layered construction,” Dr. Wolfgang Feist said in handing over the prize.