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20x25x4
MERV 10
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$72/Box of 6
($12.00/ea)
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- MERV 10 Air Filter
- Glasfloss ZL Series
- 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
- Standard Allergen Removal
- Up to 180 Day Filter
- (More Information)
- Add to Cart
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20x25x4
MERV 11
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$97/Box of 6
($16.17/ea)
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- MERV 11 Air Filter
- Glasfloss MR-11 Series
- 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
- Superior Allergen Removal
- Up to 180 Day Filter
- (More Information)
- Add to Cart
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20x25x4
MERV 13
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$223/Box of 6
($37.17/ea)
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- MERV 13 Air Filter
- Glasfloss MR-13 Series
- 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
- Best Allergen Removal
- Up to 180 Day Filter
- (More Information)
- Add to Cart

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