Nispira True HEPA + Activated Carbon Filter for Alen BreatheSmart 45i & Flex Air Purifier

Keep your Alen BreatheSmart 45i or Flex air purifier performing at its best with the Nispira True HEPA + activated carbon replacement filter — a direct-fit alternative to the original manufacturer filter.

This filter combines a preliminary layer that traps hair and dust with True HEPA filtration and activated carbon, helping capture airborne particles while deodorizing household odors.

Product Specifications

Package Includes

• 1 × Nispira True HEPA + activated carbon replacement filter

Installation

No tools or special expertise required.

1. Turn off and unplug your Alen air purifier before servicing.
2. Remove the existing filter from the unit.
3. Confirm the filter model matches your Alen 45i or Flex unit.
4. Insert the Nispira replacement filter in the correct orientation.
5. Close the compartment and restart the purifier.

Always follow your Alen air purifier's manual for filter access and orientation.

Filtration and Maintenance

• Preliminary filter layer: Traps hair and dust
• True HEPA layer: Captures up to 99.97% of airborne particles as small as 0.3 microns
• Activated carbon: Deodorizes household odors and traps dust

For best results, replace approximately every 6 months, depending on usage and indoor air quality.

Compatibility Notice

This replacement filter is designed for Alen BreatheSmart 45i and Flex (Bh400) air purifiers, comparing to original filters referenced as B4-Odor, B4-Fresh, and FL40-Silver-Carbon.

Before ordering, compare your unit's model and existing filter with the compatibility list above.

Disclaimer

Nispira is an independent brand. This is an aftermarket replacement filter and is not manufactured by Alen.

Brand names, trademarks, and model references are used solely to identify compatibility. Nispira is not affiliated with, sponsored by, or endorsed by Alen or its trademark holders.