1. A duct or pipe for conveying hot air, hot water, or steam for heating.
2. In the ancient Roman systems of furnace heating, a hot-air flue, usually of terra-cotta or built up with brick partitions and tile facings.
1. A duct or pipe for conveying hot air, hot water, or steam for heating.
2. In the ancient Roman systems of furnace heating, a hot-air flue, usually of terra-cotta or built up with brick partitions and tile facings.