eli5: Why are radiators in houses often situated under a window- surely this is the worst place and the easiest way to lose all the heat?

Question

eli5: Why are radiators in houses often situated under a window- surely this is the worst place and the easiest way to lose all the heat?

In: 2851

Answer 1

Imagine you’re a medieval soldier in a walled city. An invading army is incoming.

Would you post up on the city wall to fight the invaders right where they’re trying to come in? Or would you immediately retreat to the keep and let that invading force flow over the wall and into the city unimpeded?