Koch Filter 102-499-028 MULTI-PLEAT XL11-SC 4" Standard Capacity MERV 11 Pleated Panel Filter Size 20x20x4 25x25x2 Minimum Order 12 EA =

Minimum Order 12 EA = $41

Price 1 ea : $0

Size : 24"x30"x2"

but normally this is not a problem unless  the concentration exceed the TLVs

with Stainless Steel Lens frame and Triplex Glass Lens

Koch Filter 102-499-028 MULTI-PLEAT XL11-SC 4" Standard Capacity MERV 11 Pleated Panel Filter Size 20x20x4 25x25x2 Minimum Order 12 EA =Koch Filter 102 499 028 MULTI PLEAT XL11 SC 4" Standard Capacity MERV 11 Pleated Panel Filter Size 20x20x4 Part Number : 102 499 028 Size : 20x20x4 Depth : 4 in Packaging : 6 ea case Multi Pleat XL11 The Koch Multi Pleat XL11 is a medium efficiency extended surface pleated panel filter, engineered to provide higher initial efficiencies and better overall performance than standard pleated filters. The Multi Pleat XL11 carries a MERV 11 fractional