Heavy-Duty Construction – High Performance in Tough Operating Conditions

Provides Strength, Moisture Resistance
The frame is made with a 2-piece die-cut constructed from high wet-strength beverage carrier board.

Indoor Air Quality

VariCel II filters with antimicrobial are designed specifically to improve Indoor Air Quality (IAQ). Air filters are created to trap and concentrate particulate air contaminants, including fungal and bacterial spores. The presence of antimicrobial in the filter media is intended to preserve the integrity of the media through the useful life of the filter. Antimicrobial preservatives are not meant to increase the efficiency of the filter, or to kill microorganisms “on the fly” as they pass through a filter. Antimicrobial is EPA-registered and environmentally safe.

Unitized Construction Adds Strength, Prevents Leakage

Two mating die-cut boxes are bonded together, forming a double wall around the perimeter of the filter. The mini-pleat media pack is bonded inside the double wall. The double-walled frame prevents leakage and increases rigidity.

Easy Disposal

The thinner depth and fiberboard frame make disposal easy. VariCel II filters are only one-third the volume of other high-efficiency filters, significantly reducing the contribution to landfills. With no metal components, they are also suitable for incineration.

High Efficiency and Low Resistance Reduce Operating Costs

Slim-Line Design

The slim-line design provides minimum resistance with maximum dust loading capacity, lowering operating costs.

Rows of adhesive beads are applied 1¼″ apart on both sides of the media to separate the pleats and allow maximum airflow with minimum resistance. Beads on adjacent pleats bond to form a rigid media pack that maintains even pleat spacing as the dirt load builds, even during turbulent airflow. Media pack support retainers, built into the die-cut frame, are bonded to the pleat tips to further secure pleat spacing. Consistent pleat spacing provides even distribution of airflow throughout the entire face of the filter, resulting in lower resistance, full use of the entire depth of the media, and higher dust loading capacity.

With this design, VariCel II filters have the capacity to retain the same amount of media area, in a filter only one-third as deep, as filters using traditional corrugated aluminum separators. VariCel II filters have twice the media area of 12″-deep competitive cartridge-type, extended surface filters using high-loft, fine glass fiber media.

Compact, Space-Saving Packaging

The Slim-Line, mini-pleat design enables four VariCel II filters to be shipped in a carton only 16 inches high, compared to most competitive filters, which are shipped only one per carton. Shipping costs and storage space are significantly reduced.

Dual Density Media Increases Dust Holding Capacity

VariCel II filter media is made of microglass paper with a water repellent binder. The fibers are formed with dual density construction, consisting of coarser fibers on the air-entering side and finer fibers on the air-leaving side. This allows particles to be collected throughout the full thickness of the media, substantially increasing dust holding capacity. The media can withstand intermittent exposure to water without affecting filter performance.