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What does “log reduction” mean in air cleaning performance claims?
Key points A log reduction describes how much a measured concentration has dropped on a base-10 scale. Each…
How should you read laboratory test reports for air purifiers?
Key points A lab report is only as useful as its test setup: chamber size, airflow, mixing, pollutant…
What does air changes per hour (ACH) mean, and how does it relate to air cleaners?
Key points ACH (air changes per hour) is a measure of how many times the air in a…