PS LINEA 137 TH, a highly insulated series, is the top evolution of the minimal frame system. The system meets global design, thermal, and acoustic requirements with the help of exceptional bonding polyamides and high-energy-performance glass. PS LINEA 137 TH is available in double- or triple-glazed windows with a surface area of up to 18 sqm and can accommodate glass units up to 42 mm.