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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. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use.
MERV Rating: MERV 4
Nominal Size: 20x20x1
Actual Size: 19-7/8 x 19-7/8 x 3/4
Media: Spun Fiberglass
Frame: 1-piece heavy chipboard
Support Grid: No media retainer
Replace: Recommended 30 day changeout
Removes: MERV 4 rated filters are a great choice if you need high airflow and to protect your HVAC system. Removes larger particles like dust and lint.
Quantity: 12 Filters
Part Number: 10059-012020
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