Designed for energy-efficient, mid-rise and low-rise commercial buildings’ between-slab window wall applications, Tubelite Therml=Block® 900SG Series Window Wall four-side, structural silicone-glazed (SSG) systems feature:Thermally broken aluminum framing with dual polyamide strut barriers2″ by 6″ or 7-3/4″ framing profilesAllowance for 1″ to 1-1/8″ glazing or infill panelsInterior and exterior glazingScrew-spline constructionOptional 3″ sightline head starter accommodates vertical interstory movement Providing high thermal performance and condensation resistance, Tubelite 900SG Series Window Wall has no exterior exposed metal. Its framing can be shop-glazed to save time and labor in the field. A vertical silicone diverter replaces the need for an exterior-applied seal. Head, sill and jamb starters enable complete installation from the inside of the building. A single piece anti-buckling clip simplifies installation with fewer parts and steps.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. Enhancing a variety of design styles, different color finishes can be specified on the aluminum framing’s room-side and outside surfaces. Durable anodized and painted finishes provide long-lasting protection and color options.This high thermal performance window wall system is ideal for office, healthcare, education and other commercial buildings.