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20x20x4
MERV 10 -
$65/Box of 6
($10.83/ea) -
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- MERV 10 Air Filter
- Glasfloss ZL Series
- 20x20x4 (19-1/2 x 19-1/2 x 3-3/4)
- Standard Allergen Removal
- Up to 180 Day Filter
- (More Information)
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20x20x4
MERV 11 -
$87/Box of 6
($14.50/ea) -
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- MERV 11 Air Filter
- Glasfloss MR-11 Series
- 20x20x4 (19-1/2 x 19-1/2 x 3-3/4)
- Superior Allergen Removal
- Up to 180 Day Filter
- (More Information)
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20x20x4
MERV 13 -
$195/Box of 6
($32.50/ea) -
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- MERV 13 Air Filter
- Glasfloss MR-13 Series
- 20x20x4 (19-1/2 x 19-1/2 x 3-3/4)
- Best Allergen Removal
- Up to 180 Day Filter
- (More Information)
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20x20x4 Air Filters
