Healthy Home Audit, home

Guide · Air

Match an air purifier to a room

Start with dimensions and the purpose of the equipment. A particle air cleaner and a monitor do different jobs. Measure length, width and ceiling height, then use the calculator to see the airflow implied by a chosen air-change scenario.
A tape measure, pencil and a simple floor-plan sketch on a sunlit wooden floor.

Practical steps

Compare the manufacturer’s CADR, operating setting and room guidance. Also compare replacement-filter availability, ongoing cost and practical placement. CADR concerns particles; it should not be presented as a universal gas-removal or health-outcome measure. EPA provides a useful overview of air-cleaner selection.Source [1]

Next step

Use the room calculator, then the air-cleaner comparison checklist. The highest modeled airflow is not automatically the right purchase.

Sources and review

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  1. EPA: air cleaners in the home, US Environmental Protection Agency (accessed October 13, 2026) — Particle clean-air delivery rate and room fit; EPA does not endorse brands.
  2. EPA: cleaner-air room, US Environmental Protection Agency (accessed October 13, 2026) — Official smoke-event context; website calculation is a geometric estimate, not a protective guarantee.
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