Related Clues:

• Where there's smoke
• Flues, e.g.
• Chimney channels
• Soot collectors
• Passageways for Santa
• Apprehensions
• They may be full of hot air
• Chimney parts
• Smoky places
• Where there's sickness, by the sound of it, though having a smoke-up
• They're often full of hot air
• Draft raisers
• Passages for drawing smoke
• Air vents
• Outlets for various fuels