What does proper airflow around combustion appliances help prevent?

Proper airflow around combustion appliances is crucial for both safety and efficiency. It helps ensure that the appliance receives the adequate supply of oxygen needed for combustion, which directly influences how effectively it operates. When there is proper airflow, it minimizes the risk of incomplete combustion, which can lead to the production of harmful gases such as carbon monoxide. Additionally, good airflow helps dissipate heat, thereby reducing the risk of overheating and potential fire hazards.

Conversely, inadequate airflow can create dangerous situations, such as backdrafts or the buildup of combustible gases, increasing the risk of fire hazards and operational inefficiency. Therefore, maintaining appropriate airflow is essential to prevent these unwanted outcomes, making it clear why the correct answer emphasizes the prevention of fire hazards and inefficiency.