Final answer:
The minimum size duct for a clothes dryer is typically 4 inches in diameter to ensure proper air flow and minimize fire hazards.
Step-by-step explanation:
The minimum size duct for a clothes dryer is determined by the airflow requirements of the dryer. Typically, the recommended minimum size for a clothes dryer duct is 4 inches in diameter. This allows for proper airflow to expel the moist air from the dryer and prevent the buildup of lint.
Having a properly sized duct is important to ensure the efficient operation of the dryer and reduce the risk of fire hazards. The diameter of the duct should not be smaller than the opening on the back of the dryer to avoid restriction of airflow.