I lived in a 3x2.5 meter room one time. There are obvious drawbacks but it had a surprising amount of advantages too. Using all available space leaves very litt

I lived in a 3x2.5 meter room one time. There are obvious drawbacks but it had a surprising amount of advantages too. Using all available space leaves very little air to heat. Where would you get oxygen in a normal house? It's not like my heater can keep up if I open the windows.