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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. 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. Buy a case and be set for the year.
|Air Filter Size||20 in. x 20 in.||Air Filter Thickness||1 in.|
|Assembled Depth (in.)||1 in||Assembled Height (in.)||20 in|
|Assembled Width (in.)||20 in||Nominal Height||20.0 in|
|Nominal Width||20.0 in||Product Height (in.)||20.0|
|Product Thickness (in.)||1 in||Product Width (in.)||20|
|Air Filter Features||Filters Dust,Filters Pollen||Filter Frame Material||Cardboard|
|Filter Material||Fiberglass||Filter Performance Rating (FPR)||Not Rated|
|Longevity (months)||1||MERV Rating (Minimum Efficiency Reporting Value)||4|
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