
Maintain a pleasant room with this Blueair Classic slim air purifier. Its HEPASilent technology combines mechanical and electrostatic filtration functions for effective elimination of pollutants, and the compact fan and huge filter space provide efficient performance. This Blueair Classic slim air purifier comes with a timer to inform you when it’s time to replace the filter.
A: Hi there! The unit itself only takes one filter at a time. You'll want to replace the unit after 6 months of total use. The unit comes with a timer that'll keep track of how long the unit has been on it total. Once it's been on for a cumulative six months, that's when you'll see a light on the timer telling you that it's time to change the filter.