14x30x1 (13.5 x 29.5) Accumulair Emerald Filter (MERV 6) (4 Pack)
Up to 8-times more effective at capturing micro particles than ordinary fiberglass filters. Economical, high-capacity media makes this filter an ideal upgrade from standard fiberglass throwaways. Rugged and durable. Will not warp or leak under normal operating conditions. Excellent for high-velocity systems and maximum air flow.