Disposable furnace Filter, flat panel, no metal media retainers, up to MERV rating 4, effective against dust/lint.

• Lasts Up to 30 days
• Low airflow resistance
• Keeps equipment clean for efficient operation

This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners. The filtering medium is continuous filament spun glass. The frame is made with one continuous piece of chipboard to guard against corner separation. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use.