Designed for energy-efficient, mid-rise and low-rise commercial buildings’ slab-to-slab window wall applications, Tubelite Therml=Block® 900RW T and 900RW TU Series Ribbon Window systems feature:Thermally broken aluminum framing with single-cavity (900RW T) or dual-cavity (900RW TU) poured-and-debridged (P&D) thermal barriers2-1/4″ by 4-1/2″ or 6″ framing profilesAllowance for 1″ to 1-1/8″ glazing or infill panelsInterior and exterior glazingCaptured and silicone-glazed verticalsScrew-spline constructionTubelite 900RW Series Ribbon Window framing can be shop-glazed to save time and labor in the field. Head and sill starters enable complete installation from the inside of the building.Supporting energy-efficient buildings with a complete package that is easy to fabricate and install, our thermal performance window wall framing also is compatible with Tubelite Therml=Block curtain wall, storefront and entrances, as well as our operable vents and sun shade systems.Optional slab edge covers provide a neatly finished exterior appearance. Durable anodized and painted finishes provide long-lasting protection and color options.This thermal performance window wall system is ideal for retail, office, healthcare, education and other commercial buildings.