The duct between a boiler and the stack is called?

The duct between a boiler and the stack is called?

• A. Breeching
• B. Duct
• C. Flue
• D. Chimney

Answer: (A)

The main idea here is the specific vocabulary used for venting combustion gases in a heating system. The pipe that directly connects the boiler’s exhaust outlet to the vertical chimney stack is called breeching. This term identifies that short, specialized connector piece designed to carry the hot flue gases from the boiler into the stack. It’s distinct from the broader “flue,” which can refer to the entire passage that carries exhaust, and from the “chimney” or “stack,” which is the external vertical structure that releases the gases to the outdoors. The word “duct” is too generic for this particular purpose. Breeching is the exact name for that connecting duct between boiler and stack, with appropriate clearances and materials for high-temperature flue gases.

The main idea here is the specific vocabulary used for venting combustion gases in a heating system. The pipe that directly connects the boiler’s exhaust outlet to the vertical chimney stack is called breeching. This term identifies that short, specialized connector piece designed to carry the hot flue gases from the boiler into the stack. It’s distinct from the broader “flue,” which can refer to the entire passage that carries exhaust, and from the “chimney” or “stack,” which is the external vertical structure that releases the gases to the outdoors. The word “duct” is too generic for this particular purpose. Breeching is the exact name for that connecting duct between boiler and stack, with appropriate clearances and materials for high-temperature flue gases.