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BreatheSmart Classic HEPA-Pure Replacement Air Filter

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Product Details
About This Product

Alen BreatheSmart Classic True HEPA Pure replacement air filter is made for allergies, dust, dander, and pet fur. If you have problems with dust and dust mites inside your home, pollen from outdoor air seeping in and pet and people dander, select the True HEPA Pure filter option and know that you are getting more layers of True HEPA filtration to battle these concerns. If you suffer from allergies caused by pollen, dander, pet hair, dust or dust mites, the True HEPA Pure is the filter for you! The first layer is the cleanable pre-filter which helps to remove all of the larger particulates like dander, hair and pet fur from the air. Packed with multiple True HEPA layers the True HEPA Pure filter cleans 99.97% of particles p to .3 microns. True HEPA Pure is considered Alen's base filter layer and helps to provide clean fresh air and trap all of those airborne irritants that cause seasonal allergies and congestion.

  • REPLACEMENT AIR FILTER - for BreatheSmart Classic Air Purifiers ONLY. If you own any other BreatheSmart air purifier, find your model name to make sure you order the correct air filter.
  • WHAT IT CAPTURES - Seasonal Allergy Irritants, Pollen, Dust, Dust Mites, Dander & Pet Fur.
  • TRUE HEPA FILTER - Basic air filter offers a True HEPA Filter to capture 99.97% of airborne particles down to 0.3 microns.
  • LONG FILTER LIFE - Recommended to change filter once every 10-12 months, or dependent on usage.
  • FIND YOUR MODEL - Look on the top of the panel of the unit to find the name on the Alen air purifier BreatheSmart Classic is the only one that just says "BreatheSmart".
  • Return Policy
Product ID #: 205648324Internet #: 893127001520Model #: BF35

Additional Resources

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Dimensions: H 3 in, W 14.75 in, D 16.5 in


Product Depth (in.)16.5 inProduct Height (in.)3 in
Product Width (in.)14.75 in


Air Purifier Accessory TypeAir Purifier FilterAir Purifier FeaturesNone, Quiet
Air Treatment Product TypeAir Purifier AccessoryAppliance CategoryAppliance Parts
Appliance SeriesNot ApplicableBrand CompatibilityAlen
Color FamilyWhitesModel CompatibilityBreatheSmart Classic
Pack Size1Part TypeFilter
Particles RemovedAllergen, Bacteria, Dust, MoldPrimary Filter TypeHEPA - True
Product Weight (lb.)2.55 lbReturnable90-Day

Warranty / Certifications

Manufacturer WarrantyThere is no warranty on Alen filters.

Questions & Answers

Q:I Have a Allen breathe fresh Flex Will this filter work
by|Dec 1, 2020
0 Answer
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Q:what is the size of this filter
by|May 27, 2020
1 Answer
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A:  Its size is Product Depth (in.) 16.5 Product Height (in.) 3 Product Width (in.) 14.75

by|May 28, 2020
    Showing 1-2 of 2

    Customer Reviews

    4.9 out of 5
    • 4.9 out of 825 reviews
    • 0% recommend this product
    Filter by:
    Showing 1-10 of 825 reviews
    New Filter Smells
    The adhesive smell of the new filter is making me feel like there is something wrong with the filter. The last two filters did not have this smell. I would like the filter replaced. Here is the information about the filter. HEPA-Pure (BF35) EPA Est.No.89272-CHN-1 HKM1812 04-2023 Thanks!
    Response from MarketingDec 23, 2023
    Please contact our support team so we may better assist you.
      In the winter months, when
      In the winter months, when fresh air is at a premium, I am so grateful to have the Allen air purifier. I have two pets, one of whom sheds. I cook a lot. I need the air purifiers to keep my house smelling fresh. I have two, one on each floor. I could not do without them. And by subscribing to the auto renewal for filters, I never worry about buying new filters.
        Incredible Air Purifier
        We have 5 pets and without this air purifier I would not be able to breathe, I have to clean off the pre-filter every 2 weeks. The Allen air purifier is an incredible machine in which I run 24/7 and it does a fantastic job keeping our air clean, and I live in the south where it is very dusty and pollen heavy.
          this filter fits just fine. they are way over priced and I will not buy again. my allen air filte...
          this filter fits just fine. they are way over priced and I will not buy again. my allen air filter unit has had to be completely disassembled 2 times in first year to get it to quite down but it is still running. and it has helped with the air quality in my home.but the replacement filters fron allen are way to pricey. sorry.
          • Verified Purchase
          1 found this review helpful
          It shows how extremely well
          It shows how extremely well the filter works. When it was time for replacement, the old filter was pulled out. It was very dirty and dusty. Thanks again for cleaning the air space.
          Response from MarketingFeb 20, 2024
          Thank you for this kind review!
            Alen Classic Hepa Filter Perdormance
            I purchased Alen several purchased several Alen BreatheSmart Air Purifiers 10 years ago because of allergies, sinus infections, etc. Since using Classic Hepa Filters, my overall health has improved significantly. And my two cats are healthier as a result too! Although these filters are designed to last 9-12 months, my experience, for maximum effectiveness, is to replace the filters every 4-6 months - even with regular filter vacuuming schedule. Alen makes a great product!
            Response from MarketingJan 31, 2024
            Thank you for this kind review!
              On replacement filter, I signed
              On replacement filter, I signed up for 9 month replacement, lost track of time and called. At this point it was over a year, found out I was set up as 1 year. Makes me wonder if I ever would have received a new filter.
              Response from MarketingJan 28, 2024
              Thank you for taking the time to share this kind review!
                Great Addition
                This is our second Alen product. We also own the original version from 8 years ago. We love it.
                Response from MarketingJan 25, 2024
                Thank you for this kind review!
                  Happy customer
                  Always get an email from them right around the time the filter light turns red. Runs 24 hrs. a day for over 2 yrs. now. Actually makes my living room a bit cooler.
                  Response from MarketingJan 24, 2024
                  Thank you for sharing this kind review!
                    Perfect replacement filter
                    This filter is my go to filter for replacement on a 6 Month schedule to keep the primary room I sit in as alergy free as possible. I suffer from allergic Asthma and using this filter system helps greatly to relieve my symptoms.
                    Response from MarketingJan 21, 2024
                    Thank you for this kind review!
                      Showing 1-10 of 825 reviews