How Often Should I Replace My Disposable Furnace Filter?

Disposable furnace filters may need to be replaced once a month, three months, six months or even up to a year depending on the type of filter and the quality of the air in the home or office. If you aren’t sure how often to replace your specific brand and type of filter, please contact our support team at 855-932-4822!
For a loose frame of reference, refer to the chart below:
Furnace Filter Size Months
1″ Furnace Filter 1 – 3 Months
2″ Furnace Filter 1 – 3 Months
3″ Furnace Filter 6 – 9 Months
4″ Furnace Filter 6 – 9 Months
5″ Furnace Filter 9 – 12 Months
6″ Furnace Filter 9 – 12 Months