A chimney is just a brick tube that pulls smoke out of your house… all by itself. 🧱🔥 A firebox lined with fire brick, an opening that narrows, a metal flap called a damper, a little ledge that stops cold wind from pushing smoke into your room, clay tiles inside so the heat never reaches the wood, and a cap on top to keep out rain and birds. 🏠 Did you know there's a ledge inside your chimney that stops smoke from blowing back into your room? 👇 #chimney #fireplace #howitworks #howitsmade #engineering #physics #science #home #3danimation #explained