Replace the filter after 2 to 6 weeks, or 14 to 96 hours of use.
Depending on how much pollution is in the air when you use the filter, expect to use it for for:
- 1 month if you drive 1 to 2 hours a day,
- 2 months if you drive 1 hour a day,
- 3 months if you drive less than 1 hour a day.
The active carbon and micro-pore material in the filter collects pollutants, blocking the airways after it collects enough pollutants. You will notice that it is harder to breath through and the filter will turn grey on the inside and outside.
It is also good to know that runners use their filters 7 times faster than motorbike riders. Cyclists take in up to as much as 4 times more air than an idle rider.
