'House burping' is the latest thing cluttering people's feeds: short clips of people flinging open every window and door, announcing they're 'burping' their home to get rid of stale, germ-filled air. Behind the playful name is a serious question: Does this actually make a home healthier, or are people just swapping indoor germs for outdoor pollution? In Germany, this trend looks less like a revolution and more like everyday life. Lüften – literally "airing out" – and Stoßlüften , or "shock