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For several decades, UL has provided a testing service to assess the operating characteristics of fire sprinklers sampled from sprinkler systems in existing buildings. UL’s online tool that makes it easy for the user of these services to request testing. Sprinkler System Inspection, Testing and Maintenance

Millions of fenestration products including windows, doors, curtain walls and storefronts are installed every year in commercial, industrial and residential buildings. Building owners, including home owners, expect that each window, door and curtain wall type has been rigorously tested for functionality, performance and safety. The