Door Systems is a specialist fire door company that supplies, installs and services gravity fail-safe fire and smoke protective curtains and integrated fire door systems for commercial buildings. Its systems protect elevator openings, atriums, stairwells and other openings, and the company is also a distributor and service provider for Won-Door accordion fire doors. Its curtain products are listed to UL 10D and UL 10B. The firm holds contractor licences in California (865455), Nevada, Oregon and Washington, and it offers IFDIA fire door inspection.