| Answer | Crossword Clue |
|---|---|
| chimneys | structure for carrying off smoke |
| chimney | structure for carrying off smoke |
| baskets | A structure suspended from the envelope of a hot-air balloon for carrying the crew, equipment, and ballast |
| hydronic | of or pertaining to a heating system for a building in which the medium for carrying heat throughout the structure is circulating water, esp. when the circulation is aided by a pump |
| blowholes | A vent for air or smoke in a tunnel or other structure |
| blowhole | A vent for air or smoke in a tunnel or other structure |
