How often you need to change your filter can depend on a variety of factors, including width, media, and more. However, you’ll generally want to change out 1-inch filters every 30 days to 3 months. For pleated 4-filters, you should switch those out every 90 days to 6 months.
To ensure the best results, you should reach out to the manufacturer and get their recommendations.
Some signs that your filter needs to be changed can include:
- You notice the filter having a discolored appearance from buildup, usually gray from dirt and dust.
- You notice more dust in your home than usual.
- It takes longer than usual for your home to heat or cool.
