Fits checked Oct 1, 2026 · How we check
Filter Fit Finder
Menu

Holmes · humidifier · portable evaporative

Holmes HM6600 replacement filter

Use part HWF100. Interval not published by the maker.

The filter that fits

From the maker's archived page

Holmes Filter E

Holmes HWF100CS (E) Humidifier Wick Filter

Part number
HWF100also sold as HWF100CS
How many
1 per unit
How often
Interval not published by the maker

Holmes does not say how many wick filters this model takes; one is assumed here, so check the old filter before ordering.

Buy Filter E on Amazon

Opens an Amazon search for Holmes Filter E HWF100. Check the listing says HWF100.

See the sources

Look-alike models that take a different filter

Holmes uses letter-coded wicks (A HWF62, B HWF64, C HWF65, D HWF75, E HWF100, F HWF23); look-alike models often take a different letter, so match the model number.

Sources

Medium confidence: from an archived manufacturer page, a licensed brand store, or a live manufacturer page that names a sibling variant rather than this exact model. Each line is the page we read and the day we read it.

  • Which filter fits web.archive.org Maker's archived page checked Oct 1, 2026
    Holmes HWF100CS (E) page: Works with Holmes® humidifiers (archive.org 2015-01-25): 'HM7204, HM7305, HM7305RC, HM7306, HM6000, HM6000RC, HM6600, HM6005HD, HM729, HM4600, HM4600HD, HM630, HM7203, HM7405, HM7808'
  • What's in it web.archive.org Maker's archived page checked Oct 1, 2026
    'This filter is treated with an anti-microbial agent'
Show all 3 sources

Which filter fits

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Holmes HWF100CS (E) page: Works with Holmes® humidifiers (archive.org 2015-01-25): 'HM7204, HM7305, HM7305RC, HM7306, HM6000, HM6000RC, HM6600, HM6005HD, HM729, HM4600, HM4600HD, HM630, HM7203, HM7405, HM7808'
  2. web.archive.org Maker's archived page checked Oct 1, 2026
    Archive.org 2015-01-25: 'Holmes® humidifier filter part number HWF100 or HF235'

What's in it

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    'This filter is treated with an anti-microbial agent'