Pin kit · Filters and Replacement

Air Purifier Buying Guide: 6 Checks Before You Buy

Name: EPA minimum CADR by room area
Creator: U.S. Environmental Protection Agency
License: https://www.epa.gov/indoor-air-quality-iaq/guide-air-cleaners-home

Every page on this site ships with its own pin artwork, drawn from the same EPA-sourced figures as the article, nothing on the pin that the page cannot prove.

a pin card showing 6 cfm, the minimum clean air delivery rate ending with the only figure comparable between brands

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What the pin points at

What to look for in an air purifier, in the order that catches mistakes: room size, the EPA minimum CADR, smoke rating, ceilings, filter cost and noise.

Board: Filters and Replacement
Pillar: Buying & Equipment
Read time: 3 min

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Figures from the U.S. Environmental Protection Agency, retrieved 2026-08-30. This site shows no prices, by policy, the pin does not either.