Aluminum walls
We all use aluminum foil for cooking because of its heating benefits. The foil conducts heat to the object it is wrapping, but did you know that heat can also bounce off the aluminum?
If you put tin foil on the walls when you have the heater on, the hot air will bounce off the foil and keep the room warmer for a long time. This is a cheap and efficient way to heat your home during the winter. Be careful not to burn yourself when the foil gets hot.