What problems can occur with an exterior damper that is stuck either open or shut?

A stuck exterior damper can lead to several issues, primarily affecting the building's ventilation system. One of the significant problems is that dampers may become obstructed by wall coverings, screens, or other materials, which can prevent them from operating properly. This blockage can hinder the necessary airflow required to maintain an efficient and comfortable indoor environment.

When a damper remains stuck in the open position, it can lead to excessive air infiltration, which may cause drafts and heat loss during colder months, ultimately impacting energy efficiency. Conversely, if a damper is stuck shut, it can restrict airflow, leading to inadequate ventilation and potential moisture buildup, which may contribute to mold growth and deteriorate indoor air quality.

The options relating to enhanced ventilation efficiency and ensuring proper airflow do not apply as these are outcomes that require functional dampers. While a stuck damper may contribute to fire hazards if it prevents smoke from being vented in case of a fire, this is a less direct issue compared to the more immediate problems caused by blockages.