24x24x12 MERV 14 ASHRAE Cell, Single Header, Fiberglass, HT: 500°, GDS, Double Face Grill21674 $493.72 SKU: 21674 Back $493.72 Quantity -+ Add to Cart Details 24x24x12 MERV 14 ASHRAE Cell, Single Header, Fiberglass, HT: 500°, GDS, Double Face Grill DetailsBackDetails24x24x12 MERV 14 ASHRAE Cell, Single Header, Fiberglass, HT: 500°, GDS, Double Face GrillSee MoreSee Less