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How to Choose Chemical Filters: Key Procurement Considerations for Acid Gases, Ammonia, and VOCs When unpleasant odors occur in a factory, or a process requires the control of gaseous molecular contaminants (AMC), procurement specifications often simply state “activated carbon filters.” However, odors can originate from different gases, and the properties of acid gases, ammonia, and various volatile organic compounds (VOCs) differ significantly. Selecting a filter based solely on the presence of activated carbon may result in a filter with suitable

When purchasing industrial air filters, specifications may state “MERV 13,” while product information may indicate “ISO ePM1.” Since both figures appear to be related to filtration efficiency, can they be directly treated as equivalent? For procurement and engineering personnel, this is not simply a matter of translating terminology. The real question is whether the proposed product can meet the original specification, required airflow, and HVAC equipment conditions. Hencolin’s medium-efficiency synthetic-fiber box filter product page provides classification information based on the

Factory air intake rooms, general ventilation systems, and air handling units (AHUs) commonly use pre-filters to capture larger dust particles. If washable metal filters are used, regular maintenance can help restore airflow through the filter media. However, “washable” does not mean that every filter with a metal frame can be washed as a complete unit, nor does it mean that a deformed or damaged filter can be used indefinitely. Hencolin’s Economy Metal Pre-Filter product page introduces all-aluminum, all-stainless-steel, and detachable