This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50 years

The filtering medium is continuous filament spun glass

The frame is made with 1 continuous piece of chipboard to guard against corner separation

Maximum air flow

Alleviates strain on equipment

Filters pollen, pet dander, dust/lint, dust mites

For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use

UL 900