- Economically and environmentally friendly frame has a one-piece design
- No media retainer
- Designed for protection of furnace and central air units in residential and light commercial applications
- UL classified
- 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 one continuous