How often should HVAC filters be changed?

• A. Every week
• B. Every 1 to 3 months
• C. Every 6 months
• D. Once a year

Answer: (B)

Changing HVAC filters every 1 to 3 months is optimal for maintaining air quality and ensuring the efficiency of the system. Regular replacement prevents the accumulation of dust, allergens, and other particles that can obstruct airflow, making the HVAC system work harder than necessary. This not only helps ensure better performance but also prolongs the life of the equipment and reduces energy costs.

Filters can become clogged over time, which can lead to reduced indoor air quality and may cause mechanical issues within the HVAC system itself, such as overheating or equipment failure. While the exact frequency can depend on factors like usage, the type of filter, and the presence of pets or allergens, a general guideline of 1 to 3 months is commonly recommended. This timeframe strikes a balance between maintaining optimal performance and being manageable for homeowners to implement regularly.