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Clean Air Delivery Rate (CADR)

If you are buying an air purifier then an important metric to consider if the CADR or Clean Air Delivery Rate. But what does this describe?

CADR is a metric that is specifically used for home (residential) air purifiers, so it shouldn’t come as a surprise if you haven’t seen it before.

CADR measures the amount of air — in volume, specifically cubic feet per minute (CFM) — that is filtered by air purifier.

CADR isn’t simply CFM though because the measurement takes into account different sizes and types of particles, for instance dust, pollen, and smoke. A CADR rated air purifier will have separate CADR measurements for each type of particle.

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