Premium Replacement Filter For Alen BreatheSmart Flex And 45i Air Purifiers With H13 High Efficiency Filtration And 12 Oz Activated Carbon Pellets Great Fit Three Stage Pre Filter 1 Pack B4 Fresh Compatible
✔️ Three-stage filter: pre, H13 main, and carbon for odor control
These replacement filters are designed to fit Alen BreatheSmart Flex and 45i purifiers. This three-stage unit includes a pre-filter, an H13 main filter, and a robust activated carbon stage with more than 12 oz of carbon pellets to refresh air and cut odors in home or office spaces.
✅ Compatibility with Alen BreatheSmart Flex and 45i, replacing B4-Fresh and FL40-Silver-Carbon
✅ Three-stage filtration with 12 oz activated carbon pellets for strong odor removal
✅ H13 main filter captures 99.9% of particles down to 0.1 microns
✅ Includes one complete filter set plus three extra pre-filters for added value
💡 What is a replacement filter for Alen BreatheSmart air purifiers and how does it improve indoor air quality?
In short, this filter helps keep your purifier running efficiently and the air in your space fresher.
- Replaces B4-Fresh compatible with Flex and 45i- Includes pre-filter, H13 main filter, and activated carbon with 12 oz carbon pellets
- Improves air quality by trapping 99.9% of 0.1 micron particles and reducing odors
- Replacement cadence: main filter every 9-12 months; pre-filter every 3 months, with 3 extra pre-filters