The apartment had really nice air circulation; with open windows there is a good breeze throughout. The windows are very large and well insulated (triple pane glass). When we were there it was 35 degrees and it was so well insulated it was comfortable inside even without AC. The building itself was very nice and modern and the neighbors were so friendly! The enormous courtyard is wonderful for kids to go and play on their own. The proximity to Tempelhofer Feld was a really neat experience for us too. Also it was all very quiet and peaceful at night.