Alen's standard medical-grade H13 True HEPA filter provides outstanding wellness-boosting protection. It captures 99.99% of dust, allergens, and fine harmful pollutants as small as 0.1 microns. The air filter replacement lets you enjoy 800 SqFt of clean and healthy air every 30 minutes, and you need a replacement air filter for your Alen air purifier to enjoy a continuous supply of clean air. Using the right air filter also extends the life of the True HEPA air purifier. The air purifier has a filter indicator light that tells you when a replacement air filter is required. After replacing the filter, reset the indicator light on the air purifier. Hold down the button until the light turns green. Please not we do not recommend using knockoff filters in your FLEX or 45i.
Concerns covered: allergy and asthma triggers (dust, dander, pollen) and pollution
Trust H13 True HEPA: 3-stage H13 True HEPA filtration captures 99.9% of particles as small as 0.1 microns
Extra long-lasting 9 to 12-month life span
Fits model: BreatheSmart FLEX/45i