Airguard Duraflow XL-90 filter

Duraflow
Duraflow filters are engineered to provide rated efficiency and maintain structural integrity under the extreme operating conditions experienced by turbo-machinery applicationsLegacy Rigid Filters
​All Legacy 4" MERV 14 filters are now better than ever! Still manufactured with our proprietary E-pleat® Technology, these filters now have new and improved media!Vari-Pad
​The Vari-Pad is a pocket style prefilter designed exclusively to be installed onto the air entering side of Vari+Plus GT barrier filters operating in the reverse flow orientation. The pockets on the Vari-Pad fit over the four V-bank mini-pleat media packs on the Vari+Plus filter.Vari+Plus
​Vari+Plus offers a wide range of dirt removal efficiencies coupled with extremely low resistance to air flow. The combination of these two values offers high performance filtration, long service life and low operating costs. ​Vari-Pak and Vari-Pak Model S Filters
​Vari-Pak 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.