Dust Collection Technical Handbook - nfm-filter.com

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3 Air Changes Per Hour (ACH) – The movement of a volume of air in a given period of time; if a building has one air change per hour, it means that all of the air in the building will be replaced in a one-hour period. Air Conditioning – Treating air to meet the requirements of a conditioned space by controlling its temperature, humidity, cleanliness, and …

  Requirements