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Subscribe today and enjoy a 5% discount on all future filter orders, always free shipping, and other special offers. Simplify filter replacement and enjoy always clean air with four filter delivery options to fit your air purifier use. We recommend replacing your Blueair filter every 6 months for optimal performance.
To ensure you always get clean air, the Classic 203 Slim 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 other magnetic surfaces.