The answer to 'how often to replace replacement' is that HVAC air filters should typically be replaced every 1-3 months, depending on factors like the type of filter, home size, and number of pets. Replacing air filters regularly helps maintain proper airflow and indoor air quality in your home. Dirty filters can reduce HVAC efficiency and lead to higher energy bills.
Some homeowners may be able to get away with replacing filters every 6 months, but it's best to check them monthly and replace as needed. If you have pets or a lot of dust and allergens in your home, you may need to replace filters more frequently. It's a good idea to set a calendar reminder to check your filters on a regular basis.