What is a limitation of using powered attic ventilation fans?

Powered attic ventilation fans can indeed have short service lives, which is a notable limitation. This is primarily due to the mechanical nature of these devices; they contain moving parts that are subject to wear and tear over time. Factors such as prolonged exposure to high temperatures, humidity, and dust accumulation can accelerate this wear, reducing efficiency and functionality.

While some fans are designed for durability, many may require replacement or significant maintenance sooner than anticipated, making their long-term reliability a concern. Homeowners should consider this factor when deciding whether to install powered attic ventilation systems, as investing in a fan that may not last could lead to unexpected costs in repairs or replacements.

The other options do not accurately represent the limitations of powered attic ventilation fans. They are not always energy-efficient, as their energy consumption can sometimes outweigh the benefits, but there are models designed for efficiency. Additionally, rather than enhancing humidity, their purpose is to reduce humidity by promoting airflow. Frequent cleaning may be necessary for maintaining optimal performance, but this is more of a maintenance task rather than a direct limitation of the fans themselves.