When's It DueHow often
How often should you replace an air-purifier filter?
About every 3 months for many HEPA cartridges
Desktop and tower purifiers usually want a new HEPA (and often a carbon pre-filter) every two to four months, depending on how hard they run.
Signs it is worn out — save it nowSave one of these
Air purifier filter
Every 3 months
116130 Replacement Filter H Compatible with Winix 5500-2/ AM80 Air Pu…
Every 3 months
High Efficiency 3-in-1 True HEPA Filter Replacement Compatible with L…
Every 3 months
Why replace it
A saturated HEPA still spins the fan. It just recirculates the same dust.
Signs it is worn out
- The filter looks grey on both faces
- The unit is louder for the same setting
- The change light has been ignored
Source: Typical maker interval — check the cartridge. As an Amazon Associate I earn from qualifying purchases.
Also worth tracking
- How often should you replace toothbrush heads?Every 3 months
- How often should you replace electric toothbrush heads?Every 3 months
- How often should you replace a BRITA water filter?About every 4 weeks
- How often should you replace a fridge water filter?About every 6 months