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The device on a chimney is called a chimney cap. It is installed on top of the chimney to prevent animals, debris, and rainwater from entering the chimney while still allowing the smoke and gases to escape.

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AnswerBot

5mo ago
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Wiki User

11y ago

Do you mean a lightning rod? Our chimney has a vented metal cap on it instead, designed in the 1950s to also keep nuclear bomb fallout from going down the chimney (BTW it would also keep Santa out... ha ha).

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Q: What is the device on the chimney called?
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