How often should HVAC filters be replaced?

HVAC filters should generally be replaced every 1-3 months, depending on factors such as the type of filter, the level of air pollution and dust in the environment, and the frequency of use of the HVAC system. Some filters may have specific replacement guidelines based on the manufacturer's recommendations. It is important to replace filters regularly to ensure that the HVAC system operates efficiently and effectively, and to maintain good indoor air quality.