VARI-PAK® S - High and Medium Efficiency Extended Surface Air Filters with Synthetic Media

VARI-PAK® S filters are designed for reliability and long service life under difficult operating conditions including high velocity and turbulence. The rigid media pack is not affected by changes in air flow or repeated fan shutdown.

•High loft microfine synthetic media
•Four efficiencies: MERV 14, MERV 13, MERV 11 AND MERV 10
•Available in I” and 12” depths
•Low resistance
•Unaffected by high humidity or moisture
•Ideal for VAV (Variable Air Volume) systems
•Available with box style construction or with header (model PH)

High Loft Ultrafine Media Holds More Dirt

Vari-Pak Model S filters made with dual layer synthetic media offer superior performance in high
humidity conditions. The media is protected on the air leaving side by a high strength, spun bond synthetic scrim backing.

Controlled Pleat Spacing Maintains Shape in all Operating Conditions

The high loft media is pleated to create a large surface area (58 ft. in a 24" x 24" x 12" size) in a highly rigid, stable configuration. An expanded metal support grid is laminated to the air leaving side to form the pleats. The support grid also prevents the media from fluttering in operation which could cause collected dirt to shake loose and blow downstream. The shape of the pleats has been designed to achieve uniform dirt loading over the entire media surface area even at the back of the pleats. Full
utilization of the media increases dust holding capacity and extends service life. Pleat stabilizers inserted from both sides of the filter reinforce the media pack and retain pleat shape. The fingers hold the pleats apart under all types of operating conditions enabling air to flow smoothly through the filter at low resistance.

Rugged, All Metal Construction

The media pack is contained in corrosion resistant, galvanized steel cell sides forming a totally rigid element. Adhesive applied to the entire inside surface of the cell sides completely seals the media pack to prevent bypass. Additional structural reinforcement is supplied by diagonal cross members riveted to both sides of the filter.

VARI-PAK S Model PH with Header

The Vari-Pak S Model PH has a 13?16" header on the air entering side. This model is used for side access housings with a 1" track for the final filter. It is also a direct replacement for pocket filters or other rigid cell filters with a header.