The V4-bank filter, manufactured by Engineered Filtration Systems (EFS), is made of synthetic material. Designed to withstand high velocities and turbulence, the filter can be used for all types of air-handling systems. It has a unique handling bar, which prevents damage to media, the company states. The nonshedding fibers are specifically designed to resist moisture and chemicals, and thus resist all types of bacterial growth, says the company.

Advanced Filtration Concepts Inc., 4625 District Blvd., Vernon, CA 90058; 323-277-0288;

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