Fits checked Oct 1, 2026 · How we check
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Alen · air purifier

Alen A350 replacement filter

Use part BF15A-Pure. Replace every 6 to 12 months.

The filter that fits

Maker lists this model

Alen BF15A-Pure

A350 and A375 HEPA Filter

Part number
BF15A-Purealso sold as F00001
How many
1 per unit
How often
Replace every 6 to 12 months
Buy BF15A-Pure on AmazonManufacturer page

Opens an Amazon search for Alen BF15A-Pure. Check the listing says BF15A-Pure.

See the sources

Does your exact model share this filter?

Alen labels several versions of the A350. Check the label on your unit.

  • A350 takes BF15A-Pure
  • A375 same filter

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
    A350 and A375 HEPA Filter ... A350 - BF15A-Pure ... Fits Model: A350 and A375
  • How many web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the A350 (per its URL): Remove the used filter by lifting the pull string ... Take the new filter out of the plastic bag and insert it into the air cleaner with the arrow pointing inward (archive.org copy of 2025-10-09)
  • How often alen.com Maker's own page checked Oct 1, 2026
    Long-Lasting: Enjoy 6 to 12 months of pure air
  • What's in it web.archive.org Maker's archived page checked Oct 1, 2026
    The front side has the black mesh layer, known as the prefilter, which should be facing out
Show all 5 sources

Which filter fits

  1. alen.com Maker's own page checked Oct 1, 2026
    A350 and A375 HEPA Filter ... A350 - BF15A-Pure ... Fits Model: A350 and A375
  2. alen.com Maker's own page checked Oct 1, 2026
    A350 and A375 HEPA Filter variant: Pure F00001

How many

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the A350 (per its URL): Remove the used filter by lifting the pull string ... Take the new filter out of the plastic bag and insert it into the air cleaner with the arrow pointing inward (archive.org copy of 2025-10-09)

How often

  1. alen.com Maker's own page checked Oct 1, 2026
    Long-Lasting: Enjoy 6 to 12 months of pure air

What's in it

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    The front side has the black mesh layer, known as the prefilter, which should be facing out