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Multi-Sak Extended Surface Air Filters

Medium and High Efficiency Extended Surface Air Filters

The Koch Multi-Sak is an extended surface air filter designed for most medium and high efficiency air filtration systems.

The Multi-Sakis capable of operating in systems with rated face velocities of 500 CFM to 3000 CFM. Available efficiencies range from 20% to 95%, and seven standard face sizes are offered.

This broad spectrum of styles and models makes the Multi-Sak extremely versatile and suitable for almost any commercial or industrial air handling system. Multi-Sak filters are presently in use in over 20,000 applications, including hospitals, automotive plants, office buildings, universities, pharmaceutical facilities, and sports arenas around the world.

Two Media Options

In order to meet the strict Indoor Air Quality specifications found in today’s complex air filtration systems, Koch offers the MultiSak with two distinct types of air filter media. With two media choices, the enduser is assured of finding the correct product for every type of air handling system.

Series S Synthetic Media

  • 100% dual-layered synthetic fibers.
  • Low pressure drop
  • Unaffected by moisture or humidity
  • Available in 5 efficiency ranges
  • 90-95% (MERV 14)
  • 80-85% (MERV 13)
  • 60-65% (MERV 12)
  • 40-50% (MERV 11)
  • 25-35% (MERV8)
  • Media colorcoded by efficiency

Series G Microfiberglass Media

  • Progressively dense microfiberglass media
  • Long record of proven reliability
  • Unaffected by moisture and humidity
  • Available in 4 efficiency ranges
  • 90-95% (MERV 14)
  • 80-85% (MERV 13)
  • 60-65% (MERV 12)
  • 40-50% (MERV 1 0)
  • Media color-coded by efficiency


  • Synthetic or Microfiberglass Media
  • Low Pressure Drop/Extended Service Life
  • Five Efficiency Ranges

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