Syntheon Inc.’s Accel-E Steel Thermal Efficient Panel wall system combines cold-formed steel framing with expanded polystyrene insulation to create a lightweight, thermally resistant, high-performance building system. Each 4-ft.-wide panel comprises two cold-formed steel framing studs. EPS insulation is factory formed and mechanically fused through steel studs, slotted to eliminate thermal bridging. The insulation is available in 2 3/4-, 3 1/4- and 4 3/8-in. thicknesses.