Did not know about this

On a particularly frigid winter evening, I found myself bundled up and cozy at a friend’s house, enjoying the warmth of their living room. The snow was gently falling outside, creating a picturesque scene that was best appreciated from the comfort of indoors. As we settled in for a night of conversation and hot cocoa, I noticed something peculiar—a window in the corner of the room was slightly ajar. This discovery piqued my curiosity and led me to wonder if this was a common practice among homeowners during the winter months.

The sight of the open window was unexpected, especially given the biting cold outside. My initial thought was that it must have been left open by accident. However, upon inquiring, my friend assured me that it was intentional. They explained that they often kept a window slightly open, even on the coldest nights. This revelation was surprising and prompted me to delve deeper into the reasons behind such a practice.