The 400SS series thermal, screw spline, aluminum-framed curtainwall has a thermally broken system to deliver high thermal performance and condensation resistance. The 2 1/2-in.-wide system is available in 6-, 7 1/2-, and 10-in. depths and with an aluminum pressure plate. An optional polyamide pressure plate meets or exceeds stringent energy codes. The product tests to AAMA 501 standards.