An induced-draft blower is used to pull and exhaust the products of which process?

• A. Vent gases
• B. Combustion
• C. Condensation
• D. Evaporation

Answer: (B)

An induced-draft blower creates a slight negative pressure in the furnace to pull the gases produced by burning fuel through the heat exchanger and out the vent. It’s specifically used to remove the byproducts of combustion from the system, ensuring safe, effective venting and preventing backdrafts into the living space. The other options involve moisture changes or venting of non-combustion processes, which isn’t what this blower is designed to remove.