hepa filters time to replace?
I have an air purifier and it has a hepa filter. How do you know when it’s time to replace hte hepa filter?
They say the hepa filter on this unit should last 5 years. But the hepa filter looks dirty to me (it’s only been about 1.5 years so far). Can a hepa filter look dirty but not need replacing?
It can be dirty for a little while. But when the water starts getting dirty or when the filter looks fry then replace it.
If it looks dirty it’s because it is dirty!!
Replace the filter every year at least.