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21x23.25x4 (Actual Size) Accumulair® Emerald 4-Inch Filter (MERV 6)
Economical, high-capacity media makes this filter an ideal upgrade from standard fiberglass throwaways.
- MERV 6 Rating
- Each filter lasts up to 3 months.
- Captures a wide variety of airborne allergens including dust, mold, pet dander, and dust mites.
Rugged and durable. Will not warp or leak under normal operating conditions.
Excellent for high-velocity systems and maximum air flow.
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