Pin kit · Filters and Replacement

What Is CADR? Meaning, Ratings and What Counts as Good

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 65 cfm, the minimum clean air delivery rate for a 100 sq ft room, the smallest published row

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CADR (clean air delivery rate) is how much filtered air a purifier delivers. What the three CADR ratings mean and the EPA minimum for every room size.

Board: Filters and Replacement
Pillar: Filters & Ratings
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.