This range of high quality HS-Bag filters serve mostly as pre-filters in HVAC units. They arefitted with parallel seams sewn in the individual bag filters, ensuring even air flow through the unit at the same time guaranteeing the efficient use of the filter by evenly distributing the stored dust. The high lofty media of the HS-Pak 55 guarantees a long service lifetime while serving as pre-filterstage. HS-Pak 65 Filters are relying in micro-fibre meltblowns for low initial pressure drop.

All standard sizes are fitted with air aerodynamically shaped entry guides to optimize the energy efficiency.