How often to change merv 13 filter

MERV 13 filter should typically be replaced every 3 months under normal conditions. However, this frequency may vary depending on several factors such as air quality, usage, and environmental conditions. In areas with high pollution, construction, or if you have pets or allergies, the filter may need to be changed more frequently, around every 1-2 months. It's essential to monitor the filter's condition regularly, as a clogged filter can reduce HVAC system efficiency, increase energy consumption, and negatively impact indoor air quality. Always follow the manufacturer’s guidelines for optimal performance.