What must not be present in a chimney connector for safe operation?

For safe operation of a chimney connector, it is crucial that excessive bends, manual dampers, and leaking joints are not present. Each of these factors can significantly impair the efficiency and safety of a flue system.

Excessive bends in the chimney connector can restrict the flow of flue gases, leading to incomplete combustion and an accumulation of harmful gases within the living space. This restriction can also increase the chances of creosote buildup, which raises the fire hazard.

Manual dampers, while they can be useful in certain systems, can create complications in maintaining proper draft and can sometimes lead to unsafe operating conditions if not correctly monitored and managed. Their presence might interfere with the automatic operation that is often preferred for safety.

Leaking joints in the chimney connector can allow flue gases, which may contain carbon monoxide and other dangerous substances, to escape into the home. This poses a serious health risk to occupants and can lead to potentially life-threatening situations.

Overall, having none of these issues present ensures that the chimney connector operates safely and efficiently, minimizing risks associated with residential heating systems. Therefore, selecting "all of the above" accurately recognizes the collective importance of each factor in maintaining safe operation.