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Measure, check, plan

Litter Dust Air Purifier Sizing Helper

Turn room measurements into an airflow target and compare it with a purifier’s particle CADR.

Room volume → clean air delivery

The starting values are a worked example, not your room or a health recommendation.

View my result

Worked example

64.0 cfm

Equivalent: 108.7 m³/hour.

10.00 × 12.00 × 8.00 = 960.00 ft³. Volume × selected ACH ÷ 60 = required cfm.

Compare the same CADR category: smoke, dust and pollen ratings differ. Smoke CADR describes smaller particles. A maximum-speed rating does not establish delivery at a quieter setting; look for a speed-specific rating.

ACH is your planning choice, not clinical advice. Remove dust at its source and ventilate when appropriate. Particle filters do not establish odor adsorption performance; carbon capacity and maintenance matter separately. Avoid ozone generators.

EPA: residential air cleaners and filters

Allow the manufacturer’s intake/exhaust clearance; maintain filters under its instructions.

Room-sizing arithmetic

For an illustrative 10 × 12 × 8 ft room at a user-selected 4 ACH: 960 × 4 ÷ 60 = 64 cfm (about 108.7 m³/hour). Four ACH is an example choice, not a clinical target or a claim that 64 cfm removes odor.

Where these details come from
Air Cleaners and Air Filters in the Home

Section: Guide to air cleaners. Scope: Residential particle filtration. Source checked: 2026-09-18. Source revision date: not stated. Evidence: public-agency guidance.

  • Source control and ventilation precede supplemental filtration.
  • Particle filtration and gas removal are different tasks.

Keep going

Can an air purifier help with litter dust?Where can the litter box go in a small apartment?When your apartment smells like the litter box

Sources and Official References