I’ve always been curious that if chimneys are meant to let smoke or air out of the house then how do they prevent rain, snow, sleet, etc. From getting in?
In: Engineering
The shape of them, especially the pot thing on top, stops rain going straight down, but let’s smoke out.
Strong Wind can get in and make the chimney make a whooshing noise though. It’s quite eerie until you work out what’s making the noise.
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