Keep your Alen air purifier working like new with this Ancolin replacement filter set. It's designed for the BreatheSmart Flex and 45i models (part numbers B4-Fresh/FL40). The pack includes 1 main filter and 4 carbon pre-filters. The 3-stage system starts with a nylon pre-filter that catches larger stuff like lint and pet hair. Then the activated carbon layer tackles tough odors from cooking, pets, smoke, and VOCs. Finally, a reinforced carbon layer gives extra odor-fighting power. It traps up to 99.99% of tiny particles as small as 0.3 microns – think dust, pollen, and pet dander. Easy to install, no tools needed. For best performance, replace the main filter every 4-6 months and the pre-filter every 2-3 months. Great for homes with pets, allergies, or just anyone who wants cleaner, fresher air. Lab-tested and built to last without straining your purifier's motor. Breathe easy!
