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

Holmes aer1 HAPF300AH

aer1 HAPF300AH Allergen Remover Replacement Filter. Part HAPF300AH. Interval not published by the maker. Fits 1 model and their listed variants.

Buy aer1 HAPF300AH on Amazon

Opens an Amazon search for Holmes aer1 HAPF300AH. Check the listing says HAPF300AH.

Fits these models

Part numbers

Genuine part
HAPF300AH
Also listed as
HAPF300AH-U4, HAPF300AHCS
How often
Interval not published by the maker

Sources

  • Which filter fits web.archive.org Maker's archived page checked Oct 1, 2026
    Holmes HAP9423-UA aer1 Tower Air Purifier ... For Replacement Filter Use aer1 Filter HAPF300AH-U4 (holmesproducts.com returns 403; archive.org copy of 2017-12-28)
Show all 2 sources

Which filter fits

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Holmes HAP9423-UA aer1 Tower Air Purifier ... For Replacement Filter Use aer1 Filter HAPF300AH-U4 (holmesproducts.com returns 403; archive.org copy of 2017-12-28)
  2. web.archive.org Maker's archived page checked Oct 1, 2026
    aer1 HAPF300AHCS Allergen Remover Replacement Filter (archive.org copy of 2014-08-25)