Red Seal Appliance Service Technician Practice Exam

How often should you change the air filter in a forced air heating system?

1. Every 6 months

2. Every 1 to 3 months, depending on usage

3. Once a year

4. When the heating system is turned off

The correct answer is: Every 1 to 3 months, depending on usage

Changing the air filter in a forced air heating system every 1 to 3 months, depending on usage, is essential for maintaining efficient operation. Filters play a crucial role in trapping dust, allergens, and other particulates from the air circulated throughout the home. If the filter is not changed regularly, it can become clogged, leading to reduced airflow, which can strain the heating system, increase energy consumption, and decrease indoor air quality. The recommended frequency hinges on several factors, including the type of filter used, the presence of pets, the level of dust in the home, and how often the system is used. For instance, homes with pets or individuals with allergies might require more frequent changes, whereas a system in use during only a portion of the year may not require changing as often. Maintaining an appropriate schedule for air filter changes helps ensure the longevity and efficiency of the heating system, ultimately leading to better comfort and energy savings.