Topic · Air

Indoor air: choose the next practical step

Begin with the question. Are you choosing a particle air cleaner, estimating running cost, or deciding what a monitor can measure?

Choose a task

01Comparison
Monitor or purifier
A monitor reports selected measurements. A purifier changes air through its specific cleaning process.
02Calculator
Room-size calculator
Turn room dimensions and a chosen air-change scenario into a modeled airflow figure.
03Comparison
Compare air cleaners
Compare the same room and operating assumptions. Unknown values stay unknown.
04Calculator
Energy cost
Estimate yearly electricity use and cost from power draw, hours of use and your own rate.

Free resource

Record each model, its official instructions and replacement interval, then log what you did and when.

A device specification is not a promise about health outcomes. Check the exact model, room conditions and manufacturer instructions.

Sources show the date they were accessed. A person has not yet recorded a check date for this page.

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.
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.
EPA: radon health risk, US Environmental Protection Agency (accessed October 13, 2026) — Use official radon guidance, not a general air monitor as a substitute for appropriate testing.