Now this is a special kind of wall. You can tell how thick it is, and also that it is not the brightest spot on Earth. A small window made of light consuming and energy wasting glass bricks looking North is almost as dark as the energy saving low wattage lamp. This place is cool in summer, and rather cold in winter, and this is how it should be, according to the owners. It's the place where they stock everything, from vegetables to decorations, from canned food to empty jars. This makes it desirable to keep the temperature low in this room at all time.
Limit #10 Color Doesn't Warm Anybody
Now isn't this an interesting thing to know? Although the walls got painted in rather sunny yellow the room stays cool all year. The nice color only helps folks to feel better than if it were a grayish dark hole, but for the energy bill this doesn't matter. You may paint walls in a warm tone, but you better get thicker walls to save energy.