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Best Air Purifier With No Ozone and No Ionizer

The best no-ozone, no-ionizer air purifier is a sealed or true-HEPA unit that cleans purely mechanically, with verified CADR and low running cost.

The cleanest approach is pure mechanical filtration: no ionizer, no plasma, no ozone byproduct. We rank units with no ozone-generating technology at all by composite score.

How we score: We require ozoneTech of 'none' (no ionizer of any kind), then rank by composite score.

  1. 18.7
    Coway Airmega AP-1512HH Mighty

    The Coway Airmega AP-1512HH Mighty is a medium-room air purifier built around a True HEPA sealed-system filter. Its Clean Air Delivery Rate is AHAM-verified at 246 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $36 per year, among the cheapest to run in our set.

    • Real coverage at 4.8 ACH: ~381 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $36/yr
  2. 27.1
    Levoit Core 300S

    The Levoit Core 300S is a medium-room air purifier built around a H13 filter. Its Clean Air Delivery Rate is AHAM-verified at 175 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $45 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~271 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $45/yr
  3. 37.1
    Levoit Vital 200S

    The Levoit Vital 200S is a medium-room air purifier built around a True HEPA filter. Its Clean Air Delivery Rate is AHAM-verified at 289 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $50 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~448 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $50/yr
  4. 46.5
    Levoit Core 400S

    The Levoit Core 400S is a large-room air purifier built around a H13 filter. Its Clean Air Delivery Rate is AHAM-verified at 259 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $75 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~401 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $75/yr
  5. 55.5
    GermGuardian AC4825E

    The GermGuardian AC4825E is a large-room air purifier built around a True HEPA filter. Its 125 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $25 per year, among the cheapest to run in our set.

    • Real coverage at 4.8 ACH: ~194 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $25/yr
  6. 65.0
    Honeywell HPA300

    The Honeywell HPA300 is a large-room air purifier built around a True HEPA filter. Its Clean Air Delivery Rate is AHAM-verified at 320 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $154 per year, on the expensive end to run.

    • Real coverage at 4.8 ACH: ~496 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $154/yr
  7. 74.9
    Medify MA-25

    The Medify MA-25 is a medium-room air purifier built around a H13 filter. Its Clean Air Delivery Rate is AHAM-verified at 123 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $150 per year, on the expensive end to run.

    • Real coverage at 4.8 ACH: ~191 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $150/yr
  8. 84.7
    Austin Air HealthMate HM400

    The Austin Air HealthMate HM400 is a large-room air purifier built around a True HEPA filter. Its performance is not published as an AHAM-verified CADR, and it uses no ionizer and no ozone-generating stage. Filters run about $44 per year, a typical running cost.

    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $44/yr
  9. 94.3
    Dyson Purifier Big+Quiet Formaldehyde (BP03)

    The Dyson Purifier Big+Quiet Formaldehyde (BP03) is a whole-house air purifier built around a H13 sealed-system filter. Its 200 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $79 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~310 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $79/yr
  10. 104.2
    Dyson Purifier Cool TP07

    The Dyson Purifier Cool TP07 is a small-room air purifier built around a H13 sealed-system filter. Its 94 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $80 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~146 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $80/yr
  11. 114.0
    Coway Airmega 400

    The Coway Airmega 400 is a whole-house air purifier built around a True HEPA filter. Its Clean Air Delivery Rate is AHAM-verified at 400 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $129 per year, on the expensive end to run.

    • Real coverage at 4.8 ACH: ~620 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $129/yr
  12. 123.9
    Alen BreatheSmart Flex

    The Alen BreatheSmart Flex is a large-room air purifier built around a H13 filter. Its 225 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $89 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~349 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $89/yr
  13. 133.3
    IQAir HealthPro Plus

    The IQAir HealthPro Plus is a large-room air purifier built around a H13 sealed-system filter. Its performance is not published as an AHAM-verified CADR, and it uses no ionizer and no ozone-generating stage. Filters run about $195 per year, on the expensive end to run.

    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $195/yr
  14. 143.3
    Shark Air Purifier 6 (HE601)

    The Shark Air Purifier 6 (HE601) is a whole-house air purifier built around a True HEPA filter. Its 175 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $90 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~271 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $90/yr
  15. 152.1
    MOOKA Air Purifier B-D02L

    The MOOKA Air Purifier B-D02L is a medium-room air purifier built around a H13 filter. Its 135 cfm CADR is a manufacturer figure, not AHAM-verified, and it uses no ionizer and no ozone-generating stage. Filters run about $60 per year, a typical running cost.

    • Real coverage at 4.8 ACH: ~209 sq ft
    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $60/yr
  16. 162.1
    Molekule Air Pro

    The Molekule Air Pro is a whole-house air purifier built around a True HEPA filter. Its performance is not published as an AHAM-verified CADR, and it uses no ionizer and no ozone-generating stage. Filters run about $350 per year, on the expensive end to run.

    • Ozone / ionizer: no ionizer and no ozone-generating stage
    • Annual filter cost: $350/yr

FAQ

Are ionizers dangerous?
Some ionizers emit ozone as a byproduct, which can irritate airways. If you own one, you can usually run the unit as a plain HEPA filter with the ionizer switched off. Units with no ionizer at all avoid the question.