24x24x12 MERV 11 ASHRAE Cell, Single Header, Fiberglass, HT: 900°, GDS, Double Face Grill21665 $518.20 SKU: 21665 Back $518.20 Quantity -+ Add to Cart Details 24x24x12 MERV 11 ASHRAE Cell, Single Header, Fiberglass, HT: 900°, GDS, Double Face Grill DetailsBackDetails24x24x12 MERV 11 ASHRAE Cell, Single Header, Fiberglass, HT: 900°, GDS, Double Face GrillSee MoreSee Less