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Alen · air purifier

Alen BreatheSmart 75i replacement filter

Use part B7 Pure. Replace every 12-15 months.

The filter that fits

Maker lists this model

Alen 75i Filter, Essential (Pure)

BreatheSmart 75i HEPA Filter, Essential (Pure)

Part number
B7 Purealso sold as F20011
How many
1 per unitpacks: F20611 (6)
How often
Replace every 12-15 months
Buy 75i Filter, Essential (Pure) on AmazonManufacturer page

Opens an Amazon search for Alen 75i Filter, Essential (Pure) B7 Pure. Check the listing says B7 Pure.

See the sources

Look-alike models that take a different filter

The smaller BreatheSmart 45i and FLEX take the B4 filter, not the 75i's B7 filter.

Other genuine options from Alen

Variants and kits the maker sells for this model. Same fit, different media or packaging.

  • BreatheSmart 75i HEPA Filter, Advanced (Fresh), formerly B7 Fresh
    F20012 · Find on Amazon
  • BreatheSmart 75i HEPA Filter, Ultimate (Odor), formerly B7 Odor
    F20015 · Find on Amazon
  • BreatheSmart 75i Filters 6 Pack, Advanced (Fresh)
    F20612 · Find on Amazon
  • BreatheSmart 75i Filters 6 Pack, Ultimate (Odor)
    F20615 · Find on Amazon

Sources

High confidence: the manufacturer names this exact model on a live page. Each line is the page we read and the day we read it.

  • Which filter fits alen.com Maker's own page checked Oct 1, 2026
    BreatheSmart 75i HEPA Filter ... Our entry-level filter. Features a medical-grade HEPA filter that captures 99.9% of airborne dust, viruses, and allergens. (Formerly B7 Pure)
  • How many web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the BreatheSmart 75i (per its URL): Removed the used filter by pulling out and down on the pull loop ... Take new filter out of the plastic bag, insert the bottom and firmly push the top of the filter frame until it clicks into place (archive.org copy of 2025-09-05)
  • How often alen.com Maker's own page checked Oct 1, 2026
    Purifier includes filter rated for: 12-15 months
  • What's in it alen.com Maker's own page checked Oct 1, 2026
    The 75i filters come with a prefilter already attached.
  • Packs alen.com Maker's own page checked Oct 1, 2026
    BreatheSmart 75i Filters 6 Pack variants: Essential (Pure) F20611; Advanced (Fresh) F20612; Ultimate (Odor) F20615
Show all 6 sources

Which filter fits

  1. alen.com Maker's own page checked Oct 1, 2026
    BreatheSmart 75i HEPA Filter ... Our entry-level filter. Features a medical-grade HEPA filter that captures 99.9% of airborne dust, viruses, and allergens. (Formerly B7 Pure)
  2. alen.com Maker's own page checked Oct 1, 2026
    BreatheSmart 75i HEPA Filter variants: Essential (Pure) F20011; Advanced (Fresh) F20012; Ultimate (Odor) F20015

How many

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the BreatheSmart 75i (per its URL): Removed the used filter by pulling out and down on the pull loop ... Take new filter out of the plastic bag, insert the bottom and firmly push the top of the filter frame until it clicks into place (archive.org copy of 2025-09-05)

How often

  1. alen.com Maker's own page checked Oct 1, 2026
    Purifier includes filter rated for: 12-15 months

What's in it

  1. alen.com Maker's own page checked Oct 1, 2026
    The 75i filters come with a prefilter already attached.

Packs

  1. alen.com Maker's own page checked Oct 1, 2026
    BreatheSmart 75i Filters 6 Pack variants: Essential (Pure) F20611; Advanced (Fresh) F20612; Ultimate (Odor) F20615