The SkyVault Series M74 DS by Tubular Daylight Device (TDD) manufacturer Solatube International, Inc., is the company’s largest daylighting device to date, serving as the daylighting “core” for high-bay commercial applications. The TDD features a 29-in. diameter opening to the sky, allowing more light to be distributed. A temperature control with insulated and sealed curb-mounted roof assemblies minimize heat gain/heat loss through the roof (dual dome option improves thermal efficiency even more) and are designed to easily integrate into a building’s vapor barrier.






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