Boilers require a ______ control to help control the draft going through the boiler.

Boilers require a ______ control to help control the draft going through the boiler.

• A. Draft
• B. Temperature
• C. Pressure
• D. Fuel

Answer: (A)

Boilers rely on controlling the air flow through the furnace and out the stack to maintain proper combustion. This is done with a draft control, which adjusts the amount of air available for burning—often through a damper or fan setup that regulates the draft. Keeping the draft in the right range ensures the flame stays stable and combustion remains efficient: too much draft wastes heat up the stack, while too little can cause incomplete combustion and dangerous gases like carbon monoxide. Temperature, pressure, and fuel controls each manage other aspects of operation, but they don’t directly regulate the air movement through the boiler, which is precisely what a draft control does.

Boilers rely on controlling the air flow through the furnace and out the stack to maintain proper combustion. This is done with a draft control, which adjusts the amount of air available for burning—often through a damper or fan setup that regulates the draft. Keeping the draft in the right range ensures the flame stays stable and combustion remains efficient: too much draft wastes heat up the stack, while too little can cause incomplete combustion and dangerous gases like carbon monoxide. Temperature, pressure, and fuel controls each manage other aspects of operation, but they don’t directly regulate the air movement through the boiler, which is precisely what a draft control does.