National Home Inspector Practice Exam

Question: 1 / 400

What is the purpose of a furnace filter?

To regulate the temperature of the furnace

To trap dust and debris, improving air quality

The purpose of a furnace filter is to trap dust and debris, which plays a crucial role in improving indoor air quality. By capturing particles such as dust, pollen, pet dander, and other allergens, the filter prevents these contaminants from circulating throughout the home. This is particularly important for individuals with allergies or respiratory issues, as it helps create a healthier living environment.

While other aspects of furnace operation may benefit from a clean filter, such as maintaining efficiency and reducing strain on the system, these are secondary functions. The primary and most significant role of the filter is to enhance air quality by keeping harmful particles out of the airflow. A clean filter can also contribute to a more efficient heating system, as it allows for better airflow; however, the main intention remains focused on air cleanliness.

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To reduce noise levels in the furnace

To maintain the furnace's fuel efficiency

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