Products
Series K-40
Extended Surface Air Filters
  • Designed for value and economy
  • Ideal for filter service programs and preventive maintenance plans
  • Moisture resistant beverage-board frame
  • Sturdy double-wall design
  • Completely disposable


Series K-40 Filters are engineered to provide an excellent combination of rugged construction, high quality performance, and low initial cost.

The filter is a medium efficiency, extended surface pleated panel designed for use in all types of residential, commercial, and industrial air filtration systems.
The value-oriented design of the Series K-40 makes it the air filter of choice in applications where filters are changed according to predetermined maintenance schedules, instead of pressure gauge readings. Series K-40 filters are offered in a wide range of popular sizes, and in thickness of 2" and 4".

The K-40 carries a MERV 8 and MERV-A 8 performance rating in accordance with ASHRAE Test Standard 52.2-2012.
In addition to the Series K-40, Koch Filter corporation manufactures a complete line of pleated panels and other air filtration products. Please consult your Koch representative for specific recommendations on the right filters for your system.