The Koch Multi-Pleat XL8 MERV 8 furnace filter is a high performance disposable replacement air filter for all gas and oil furnaces, heat pump and AC air handlers that use a 20 x 25 x 4 air filter.
Commonly used in Air-Vac Fume Exhaust Systems Furnaces.
This filter should have the same if not higher efficiency rating as the original equipment manufacturers air filter media.
It is also unaffected by high humidity and is hydrophobic (non-moisture absorbing). Koch Multi-Pleat XL13 air filters can upgrade existing flat panels.
The Koch air filter media should be checked every month. Adjust the schedule to your needs, but at least replace the filter every three months.
This package ships with 6 filters.