Average filter replacement life: Depending on the environmental conditions, the Maestro Nimbus filter remains effective anywhere between 6-12 months (based on usage and conditions).
Filter replacement: For optimum performance always replace the filter when the indicator light on the Nimbus turns and remains a solid red colour.
*The HEPA-13 filter is not washable, never wet the HEPA-13 filter, it will malfunction and therefore must be replaced.