Old buildings stay warm because they are built with heavy materials that soak up heat like a sponge.
The Heat Sponge Materials like stone and brick absorb [sunlight](/search?q=sunlight) or furnace warmth [during the](/search?q=during%20the) day. At night, they slowly release that [stored energy](/search?q=stored%20energy) back into the room.
No Drafts Either, [thick walls](/search?q=thick%20walls) stop cold air from sneaking in through cracks. Think of an old house like a thermos flask that keeps your drink hot for hours instead of minutes. The weight of the building acts as a shield against the chilly winter wind outside.
Examples
- Thick brick walls feel cool to the touch in summer but hold heat in winter.
- An old castle feels less drafty than a new glass office building.
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See also
- How does a refrigerator keep food cold using basic physics?
- How does a refrigerator cool food?
- What are thermodynamic properties?
- What makes hot air rise and cold air sink?
- What is Dissipated energy?