NYT:
‘House burping’ is catching on.
“In Germany, it is second nature for people to open their windows a few times each day to cycle out stale air. They call the practice “lüften,” which roughly translates to “ventilate” or “air out.” Many German landlords make their tenants promise to do so daily.
In recent weeks, lüften has gained traction with Americans, who have flooded social media with videos referring to the practice as “house burping.” Unlike many online trends, there are real benefits: Experts say that opening windows can help clean the air and reduce mold.”