Our most popular unit, the refurbished Classic 403 air purifier is designed for rooms up to 365 square feet. Comes with our standard Particle filter to eliminate 99.97% of harmful particles from the air, down to 0.1 microns in size.
To ensure you’re never getting less than high quality clean air, the Blueair Classic 403 comes with a timer to alert you when your filter needs to be changed. The magnet on the back allows you to attach the timer to your unit or any other magnetic surface.