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The best ALEN air purifier depends on your needs, preferences, and budget. However, some of the most popular and highly rated models are the BreatheSmart 75i, the BreatheSmart 45i, and the BreatheSmart FLEX. These air purifiers have True HEPA (H13) filters that can remove 99.9% of harmful particles, such as allergens, dust, mold, and germs. They also have smart sensors that adjust the fan speed according to the air quality, and customizable panels that match your style. You can learn more about these and other ALEN air purifiers on their website or read some reviews from experts and customers .

To sign up for the auto-ship program, you need to visit the ALEN website and select the subscribe option at checkout when you purchase an air purifier or a replacement filter. You can choose how often you want new air filters delivered, and you will get 10% off your scheduled orders plus free shipping. You can also customize your subscription by logging into your account and changing the delivery frequency. The auto-ship program is a convenient and cost-effective way to ensure that your air purifier always works at its best. For more details, you can check out the ALEN auto-ship page.

ALEN's filters are designed to address different air quality concerns, such as allergies, dust, mold, germs, odors, smoke, and VOCs. They use True HEPA (H13) technology, which means they can capture 99.9% of particles as small as 0.1 microns. They also have different layers of activated carbon, silver, or ozone-safe ionization to enhance their performance and longevity. ALEN's filters are easy to replace and come in various sizes and types to fit different models of air purifiers. You can find the right filter for your unit and learn more about its features on the ALEN filter page.