Our rental apartment in Colmar cheated. It had a modern heating system that kept the rooms decent, meaning we were not huddled around a space heater or personally fighting two-foot-thick stone masonry to stay warm.
Step outside onto the streets around 5:00 PM in December, though, and you see how the rest of the city actually survives the cold.
Back in East Taunton, our thermostat sits at 20 degrees Celsius (68 Fahrenheit). When cold air presses against the windows, the oil burner in the basement kicks on and burns through cash. Exterior shutters in Massachusetts are purely cosmetic: cheap plastic pieces screwed directly into vinyl siding. They do not move, they do not seal, and they do not stop heat loss.
In Colmar, shutters are functional equipment.
You do see modern motorized rolling shutters slide down their tracks with a faint hum, but the real habit is on the older half-timbered buildings. Right around dusk, casement windows swing wide open on the second and third floors. A resident leans halfway out into the 35-degree air, unlatches the heavy painted wooden shutters from the wall hooks, swings them shut against the frame, drops the iron bar into place, and pulls the window shut.
It takes ten seconds per window. You see it repeated down every alley as darkness sets in.
That slab of wood puts an immediate physical barrier between the glass and the freezing street, killing drafts and stopping radiant heat loss cold. By 5:30 PM, the street transforms. Facades that looked open and quaint at 3:00 PM look like locked timber boxes. Nobody leaves bare glass exposed to the night sky to look picturesque for tourists walking past.
In America, we expect an automated thermostat to erase the climate outside without us having to lift a finger, and we pay thousands of dollars every winter for that luxury. In Alsace, staying warm is a set of manual habits and physical barriers people have practiced for centuries because wasting BTUs was never an option.
