Keep your air purifier, dehumidifier, humidifier or mask working efficiently. To do so make sure your filters are replaced where applicable.
When you need to replace your filters will depend on the type of unit you are using, the level of contamination and how the long unit has been running.
We'll remind you when your filter is due for replacement as part of our filter reminder service.
As well as replacing the filters when necessary, all electronic equipment should also be maintained. Always read the manufacturer's instructions.