Carbon filter lifespan is very difficult to predict, as every house has differing levels of background VOCs.
As such, we recommend what we call the “smell test” to know when to replace a carbon filter. To run your smell test:
- Open your purifier and remove the carbon filter
- Hold the middle of the carbon filter up to your nose (within 1-3cm) and smell the carbon filter
- If you smell a sour, acidic or chemical smell, then this means your carbon filter is saturated and should be replaced.
Perform the above 3 steps on a regular basis (every 1-2 weeks) to tell when to replace your carbon filter.