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

Vornado AC350 replacement filter

Use part MD1-0022. Year with continuous use, depending on your environment.

The filter that fits

Maker lists this model

Vornado MD1-0022

MD1-0022 True HEPA Filter

Part number
MD1-0022
How many
1 per unit
How often
Year with continuous use, depending on your environment
Buy MD1-0022 on AmazonManufacturer page

Opens an Amazon search for Vornado MD1-0022. Check the listing says MD1-0022.

See the sources

Also replace the pre-filter

Maker lists this model

Vornado MD1-0023 carbon pre-filter

MD1-0023 Activated Carbon Filter (2-Pack)

Part number
MD1-0023
How many
1 per unit
How often
Replace every 4-6 months with continuous use, depending on your environment
Buy MD1-0023 carbon pre-filter on AmazonManufacturer page

Opens an Amazon search for Vornado MD1-0023 carbon pre-filter. Check the listing says MD1-0023.

See the sources

Look-alike models that take a different filter

The AC500 takes the same two filters.

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 vornado.com Maker's own page checked Oct 1, 2026
    AC350 Air Purifier with HEPA Filtration ... One (1) HEPA Filter (MD1-0022) and One (1) Activated Carbon Prefilter (MD1-0023) included.
  • How often vornado.com Maker's own page checked Oct 1, 2026
    Replace your True HEPA Filter every year with continuous use, depending on your environment.
  • Packs vornado.com Maker's own page checked Oct 1, 2026
    Contains 2 filters.
Show all 8 sources

Which filter fits

  1. vornado.com Maker's own page checked Oct 1, 2026
    AC350 Air Purifier with HEPA Filtration ... One (1) HEPA Filter (MD1-0022) and One (1) Activated Carbon Prefilter (MD1-0023) included.
  2. vornado.com Maker's own page checked Oct 1, 2026
    Fits AC300, AC350, AC500, AC550, PCO200, PCO300, PCO375DC, PCO500, PCO575DC ... Replace every year, depending on use
  3. vornado.com Maker's own page checked Oct 1, 2026
    Page for the AC350 (per its URL): One (1) Activated Carbon Prefilter (MD1-0023) included.
  4. vornado.com Maker's own page checked Oct 1, 2026
    Fits AC300, AC350, AC500, AC550, PCO200, PCO300, PCO375DC, PCO500, PCO575DC ... Replace every year, depending on use | This True HEPA Filter, part number MD1-0022, works with models AC300, AC500, PCO200, PCO300, PCO375DC, PCO500, and PCO575DC True HEPA Air Purifiers.
  5. vornado.com Maker's own page checked Oct 1, 2026
    This Activated Carbon Filter (2-Pack), part number MD1-0023, works with models AC300 and AC500 True HEPA Air Purifiers. ... Contains 2 filters.

How often

  1. vornado.com Maker's own page checked Oct 1, 2026
    Replace your True HEPA Filter every year with continuous use, depending on your environment.
  2. vornado.com Maker's own page checked Oct 1, 2026
    Replace your carbon pre-filter every 4-6 months with continuous use, depending on your environment.

Packs

  1. vornado.com Maker's own page checked Oct 1, 2026
    Contains 2 filters.