> That means that buildings are built with the expectation of being warmed... That doesn't seem strange to me. At even lower temperatures, water pipes will bur

> That means that buildings are built with the expectation of being warmed... That doesn't seem strange to me. At even lower temperatures, water pipes will burst, so you have to heat it at least a little in winter. Waste heat from humans might be enough to avoid freezing temperatures, but then humans also produce a lot of humidity, causing mold.